DOCSLIB.ORG

Oxygen Permeable Membrane

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text

Load more

Europaisches Patentamt 0154 468 J European Patent Office Publication number: B1 Office europeen des brevets EUROPEAN PATENT SPECIFICATION M 12/06 Date of publication of patent specification: 04.10.89 intci.4: H 01 M 4/86, H 01 Application number: 85301213.6 Date of filing: 22.02.85 Oxygen permeable membrane. Priority: 24.02.84 JP 33589/84 Proprietor: KABUSHIKI KAISHA TOSHIBA 24.02.84 JP 33593/84 72, Horikawa-cho Saiwai-ku Kawasaki-shi Kanagawa-ken 210 (JP) Date of publication of application: 11.09.85 Bulletin 85/37 Inventor: Susuki, Nobukazu c/o Patent Division Kabushiki Kaisha Toshiba 1-1 Shibaura 1-chome Minato-ku Tokyo (JP) Publication of the grant of the patent: Inventor: Tsuruta, Shinji c/o Patent Division 04.10.89 Bulletin 89/40 Kabushiki Kaisha Toshiba 1-1 Shibaura 1-chome Minato-ku Tokyo (JP) Designated Contracting States: DEFRGB Representative: Eyles, Christopher Thomas et al BATCHELLOR, KIRK & EYLES 2 Pear Tree Court Farringdon Road References cited: London, EC1R0DS(GB) EP-A-0097 770 US-A-3972 732 US-A-4018943 CD GO <O in Note: Within nine months from the publication of the mention of the grant of the European patent, any person may shall give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition been filed until the opposition fee has been 0. be filed in a written reasoned statement. It shall not be deemed to have ) convention). UJ paid. (Art. 99(1 European patent Courier Press, Leamington Spa, England. EP 0 154 468 B1 Description This invention relates to an oxygen permeable membrane which permits oxygen gas to pass through while substantially blocking other gases. The present invention has application in hydrogen-oxygen 5 electric fuel cells, metal-air battery cells and oxygen sensing devices. In the prior art, gas diffusion electrodes have been used for air electrodes in various fuel cells, air-metal cells, such as air-zinc cells, and Galvanic oxygen sensors. Thick porous electrodes having distributed pores with a uniform diameter were used as the gas diffusion electrode. In recent years, however, electrodes having a two-layer structure have been used. The electrode comprised a porous electrode body with an 10 electrochemical reduction function for oxygen gas (a function for ionising oxygen) and a current collector function. The electrode also had a thin water repellent layer deposited integrally on the gas-side surface of the electrode body. In such electrodes, the electrode body may be formed by a conductive powder, a porous metallic body, a porous carbon body or a non-woven carbon fabric material. This may be accomplished by the use of a 15 binder such as polytetrafluoroethylene. Such conductive powders may be selected from among active carbon powders carrying a nickel tungstate with a low reduction overvoltage to oxygen gas, a tungsten carbide coated with palladium, cobalt, nickel, silver, platinum or palladium. US — A — 3972732 describes a catalytic electrode which comprises a metallic oxide and a carbonaceous material. 20 The aforementioned water repellent layer, which is deposited integrally on the gas-side surface of the electrode body, is a porous thin membrane which comprises a fluorine-containing resin such as polytetrafluoroethylene, tetrafluoroethylene-hexafluoropropylene copolymer or ethylene-tetrafluoro- ethylene copolymer. The membrane may also be comprised of a resin, such as polypropylene, in the form of a porous material including, for example, a sintered powder material having a particle size of from 0.2 to 25 40 urn; a paper-like non-woven fabric material prepared by heat treatment of fibres comprising polypropylene resin or a similar woven fabric material; a powder material wherein the polypropylene resin is partially replaced by a fluorinated graphite; a film material prepared by rolling fine powder together with a pore-increasing agent or a lubricant oil followed by heat treatment or a film material prepared by rolling without being followed by heat treatment. Such materials are disclosed in Japanese Patent Publication No. 30 44978/1973. In an air electrode having the structure as described above, however, the water repellent layer deposited on the gas-side surface of the electrode body is impervious to electrolyte but is not impervious to air and water vapour in the air. For this reaosn, water vapour in the air may penetrate the electrode body through the water repellent layer and dilute the electrolyte or the water in the electrode may otherwise 35 dissipate through the water repellent layer, therby increasing electrolyte concentration. As a result, the concentration of the electrolyte will fluctuate and it will thus be impossible to maintain stable discharge characteristics over a long period of time. When carbon dioxide gas in the air penetrates the electrode body through the water repellent layer and is absorbed by an active site (a porous portion of the electrode body), the electrochemical reducing 40 function of the active site to oxygen gas is reduced at the point of absorption. Thus, the heavy-load discharge capability of the cell is adversely affected. Moreover, when an alkaline electrolyte is used, there will be a change in the properties of the electrolyte, a reduction in the concentration of the electrolyte and, if the cathode is zinc, passivation of the zinc cathode. Furthermore, heavy-load discharge may be hindered because the area of electrochemical reduction is reduced by the production of carbonate in the active site 45 which blocks the pores. These factors lead to a decline in the performance of the cell from its design rating after the cell is stored or used for a long period of time. In order to overcome the aforementioned disadvantages, there has been proposed a cell in which a water repellent layer for the air electrode is provided on the gas side (air side) thereof with a layer comprising a water-absorbing agent, such as calcium chloride, or a carbon dioxide gas-absorbing gent, so such as a hydroxide of an alkaline earth metal. Such a cell is disclosed in Japanese Patent Publication No. 841 1/1 973. This type of cell can prevent the above-mentioned problems to some extent. However, when the absorbing agent has been saturated with water or carbon dioxide gas, it becomes wholly ineffective. There have also been attempts to laminate an oxygen permeable membrane on the above-mentioned water repellent layer. Such a membrane is disclosed in Japanese Patent Publication No. 26896/1973. 55 However, a sufficiently effective oxygen gas permeable membrane has not been developed thus far. The present invention accordingly seeks to provide a selectively permeable composite membrane, and an air electrode being made therefrom, which is permeable to oxygen gas while at the same time being impervious to water vapour in air. It also seeks to provide an air electrode comprising an oxygen gas permeable membrane which eo enables a heavy-load discharge to be maintained over a long period of time. According to a first aspect of this invention, there is provided a composite membrane for passing oxygen gas, said membrane comprising a metallic oxide and and a carbonaceous material characterised in that the membrane comprises: a porous membrane having micropores the diameter of which is equal to or less than 1 um; and 65 a thin layer affixed to at least one surface of said porous membrane and having a thickness in the range EP 0154 468 B1 said metallic oxide being of 0.01 to 1 |im, said thin layer containing a metallic oxide in a carbon matrix, barium oxide, selected from among the group consisting of tin dioxide, zinc oxide, strontium oxide, titanium dioxide, silicon dioxide, cuprous oxide, manganese monoxide, nickel oxide, tricobalt tetroxide, vanadium dioxide, molybdenum dioxide, tungsten dioxide, ruthenium dioxide, niobium dioxide, dioxide and platinum 5 chromium dioxide, rhenium dioxide, osmium dioxide, rhodium dioxide, iridium dioxide.. The invention thus provides a selectively permeable composite membrane having a two-layer construction. The membrane comprises a porous membrane layer having micropores and a thin layer the containing, in a carbon matrix, a water-containable or wettable metallic oxide, a metal oxide having The thin is 10 capability of absorbing oxygen or a metal oxide having a rutile-type crystal structure. layer laminated integrally on to one or both surfaces of the porous membrane layer. According to the second aspect of this invention, there is provided an air electrode for a cell comprising a metallic oxide and a carbonaceous material characterised in that it comprises: with a main electrode body having the capability of electro-chemical reduction of oxygen gas a is laminated 15 collector function; and the composite membrane according to the invention. The thin layer membrane integrally on the gas side surface of the main body of the electrode with a porous layer between. The metallic oxide which is contained in the carbon matrix is a water-containable or wettable metallic oxide or has the ability of absorbing oxygen or has a rutile-type crystal structure. The water- containable or wettable metallic oxide used in this invention is a material having the ability to absorb water absorbed 20 and having properties for permitting water absorbed to exist as chemically and physically water. The water-containable (wettable) properties means that a metallic oxide exists in combination with water molecules or in a state having an interaction with water molecules. Examples of the above mentioned metallic oxides include tin dioxide (SnO2), zinc oxide (ZnO), aluminium oxide (AI2O3), magnesium oxide silicon (MgO), calcium oxide (CaO), strontium oxide (SrO), barium oxide (BaO), titanium dioxide (TiO2) and of 25 dioxide (SiO2). These oxides may be used alone or in the form of a composite comprising a combination two or more types thereof.
Recommended publications
  • Hazardous Laboratory Chemicals Disposal Guide

    Hazardous Laboratory Chemicals Disposal Guide

    Third Edition HAZARDOUS LABORATORY CHEMICALS DISPOSAL GUIDE Third Edition HAZARDOUS LABORATORY CHEMICALS DISPOSAL GUIDE Margaret-Ann Armour LEWIS PUBLISHERS A CRC Press Company Boca Raton London New York Washington, D.C. This edition published in the Taylor & Francis e-Library, 2005. To purchase your own copy of this or any of Taylor & Francis or Routledge’s collection of thousands of eBooks please go to http://www.ebookstore.tandf.co.uk/. Library of Congress Cataloging-in-Publication Data Armour, M.A. (Margaret-Ann) Hazardous laboratory chemicals disposal guide/Margaret-Ann Armour.—3rd ed. p. cm. Includes bibliographical references. ISBN 1-56670-567-3 1. Chemical laboratories—Waste disposal. 2. Hazardous substances. I. Title. QD64.A76 2003 542′.89–dc21 2002043358 This book contains information obtained from authentic and highly regarded sources. Reprinted material is quoted with permission, and sources are indicated. A wide variety of references are listed. Reasonable efforts have been made to publish reliable data and information, but the authors and the publisher cannot assume responsibility for the validity of all materials or for the consequences of their use. Neither this book nor any part may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, microfilming, and recording, or by any information storage or retrieval system, without prior permission in writing from the publisher. The consent of CRC Press LLC does not extend to copying for general distribution, for promotion, for creating new works, or for resale. Specific permission must be obtained in writing from CRC Press LLC for such copying. Direct all inquiries to CRC Press LLC, 2000 N.W.
  • Theoretical and Experimental Aspects of Current and Future Research on Nbo2 Thin Film Devices

    Theoretical and Experimental Aspects of Current and Future Research on Nbo2 Thin Film Devices

    crystals Review Theoretical and Experimental Aspects of Current and Future Research on NbO2 Thin Film Devices Denis Music 1,* , Andreas M. Krause 1 and Pär A. T. Olsson 1,2 1 Department of Materials Science and Applied Mathematics, Malmö University, SE-205 06 Malmö, Sweden; [email protected] (A.M.K.); [email protected] (P.A.T.O.) 2 Division of Mechanics, Lund University, Box 118, SE-221 00 Lund, Sweden * Correspondence: [email protected]; Tel.: +46-40-6658709 Abstract: The present research front of NbO2 based memory, energy generation, and storage thin film devices is reviewed. Sputtering plasmas contain NbO, NbO2, and NbO3 clusters, affecting nucleation and growth of NbO2, often leading to a formation of nanorods and nanoslices. NbO2 (I41/a) undergoes the Mott topological transition at 1081 K to rutile (P42/mnm), yielding changes in the electronic structure, which is primarily utilized in memristors. The Seebeck coefficient is a key physical parameter governing the performance of thermoelectric devices, but its temperature behavior is still controversial. Nonetheless, they perform efficiently above 900 K. There is a great potential to improve NbO2 batteries since the theoretical capacity has not been reached, which may be addressed by future diffusion studies. Thermal management of functional materials, comprising thermal stress, thermal fatigue, and thermal shock, is often overlooked even though it can lead to failure. NbO2 exhibits relatively low thermal expansion and high elastic modulus. The future for NbO2 thin film devices looks promising, but there are issues that need to be tackled, such as dependence of properties on strain and grain size, multiple interfaces with point and extended defects, and interaction with various natural and artificial environments, enabling multifunctional Citation: Music, D.; Krause, A.M.; applications and durable performance.
  • Microbial Dissolution and Stabilization of Toxic Metals and Radionuclides In

    Microbial Dissolution and Stabilization of Toxic Metals and Radionuclides In

    840 Experientia 46 (1990), Birkh~iuser Verlag, CH-4010 Basel/Switzerland Reviews 34 Trevors, J. T., Stratton, G. W., and Gadd, G. M., Cadmium transport, 38 Tsezos, M., and Volesky, B., The mechanism of uranium biosorption resistance and toxicity in bacteria, algae and fungi. Can. J. Microbiol. by Rhizopus arrhizus. Biotechnol. Bioeng. 24 (1982) 385-401. 32 (1986) 447-464. 39 Wainwright, M., and Grayston, S. J., Accumulation and oxidation of 35 Tsezos, M., Recovery of uranium from biological adsorbents-desorp- metal sulphides by fungi, in: Metal-Microbe Interactions, pp. 119- tion equilibrium. Biotechnol. Bioeng. 26 (1984) 973-981. 130. IRL Press, Oxford 1989. 36 Tsezos, M., Absorption by microbial biomass as a process for removal of ions from process or waste solutions, in: Immobilization of Ions by Bio-sorption, pp. 201-218. Ellis Horwood, Chichester 1986. 37 Tsezos, M., and Volesky, B., Biosorption of uranium and thorium. 0014-4754/90/080834-0751.50 + 0.20/0 Biotechnol. Bioeng. 22 (1981) 583-604. Birkhfiuser Verlag Basel, 1990 Microbial dissolution and stabilization of toxic metals and radionucfides in mixed wastes A. J. Francis Department of Applied Science, Brookhaven National Laboratory, Upton (New York 11973, USA) Summary. Microbial activity in mixed wastes can have an appreciable effect on the dissolution or precipitation of toxic metals and radionuclides. Fundamental information on microbial dissolution and stabilization (immobilization) of toxic metals and radionuclides, in particular actinides and fission products, in nuclear wastes under various microbial process conditions, e.g., aerobic, denitrifying, iron-reducing, fermentative, sulfate-reducing, and methanogenic conditions is very limited. Microbial transformations of typical waste components such as metal oxides, metal coprecipitates, naturally occurring minerals, and metal organic complexes are reviewed.
  • Physical and Chemical Properties of Platinum Group Metals 2 Chapter 2 | Physical and Chemical Properties of Platinum Group Metals Contents

    Physical and Chemical Properties of Platinum Group Metals 2 Chapter 2 | Physical and Chemical Properties of Platinum Group Metals Contents

    PHYSICAL AND CHEMICAL PROPERTIES OF PLATINUM GROUP METALS 2 CHAPTER 2 | PHYSICAL AND CHEMICAL PROPERTIES OF PLATINUM GROUP METALS CONTENTS 2.1 OVERVIEW OF PGMS 04 2.2 METALLIC PGMS 05 2.3 COMPOUNDS OF PLATINUM GROUP METALS 06 SIMPLE COMPOUNDS 06 COMPLEX COMPOUNDS 07 REFERENCES 13 2 CHAPTER 2 | PHYSICAL AND CHEMICAL PROPERTIES OF PLATINUM GROUP METALS SUMMARY • Six elements of Groups 8, 9, and 10 in the periodic table constitute the platinum group metals (PGMs): platinum (Pt), palladium (Pd), rhodium (Rh), ruthenium (Ru), iridium (Ir), and osmium (Os). • The physical and mechanical properties of the PGMs and their compounds indicate a wide range of properties with widely varying densities and solubilities (see Table 2-1). • Metallic forms of PGMs are generally considered to be ‘inert’, i.e., not chemically reactive. However, this is dependent in part on dimensional characteristics. Thus, while massive metal forms have low chemical reactivity, fi nely-divided metal powders with high surface area show greater reactivity. • Simple binary compounds exist for each of the PGMs. They also form a vast array of complex coordination compounds in which the central metal atom is bound to a variety of ligands by coordinate bonding, including halides, sulphur, amines, and other atoms and groups. • This unique coordination chemistry has made PGM compounds of great industrial value, but also can have implications for the health of workers exposed to certain of these compounds due to the linkages with biological behaviour and toxicity (see Chapter 6). • The complex halogenated platinum compounds (CHPS) are among those which are industrially and toxicologically important.
  • Molecular Beam Epitaxy in the Lithium-Niobium-Oxygen System

    Molecular Beam Epitaxy in the Lithium-Niobium-Oxygen System

    MOLECULAR BEAM EPITAXY IN THE LITHIUM-NIOBIUM-OXYGEN SYSTEM by Mario Petrucci Department of Electrical and Electronic Engineering, University College London. A thesis submitted to University College, University of London for the degree of Doctor of Philosophy. October, 1989 1 ProQuest Number: 10610929 All rights reserved INFORMATION TO ALL USERS The quality of this reproduction is dependent upon the quality of the copy submitted. In the unlikely event that the author did not send a com plete manuscript and there are missing pages, these will be noted. Also, if material had to be removed, a note will indicate the deletion. uest ProQuest 10610929 Published by ProQuest LLC(2017). Copyright of the Dissertation is held by the Author. All rights reserved. This work is protected against unauthorized copying under Title 17, United States C ode Microform Edition © ProQuest LLC. ProQuest LLC. 789 East Eisenhower Parkway P.O. Box 1346 Ann Arbor, Ml 48106- 1346 To the memory of my father, Vincenzo Petrucci. 'We work not only to produce But to give value to time." Eugene Delacroix "Oh, Mr. Scientist: you take what you see And fashion a wondrous soliloquy; But greater magic is forged in what you write: Where night becomes day and day becomes night!" 2 ABSTRACT The N b -L i-0 materials system offers an extensive combination of properties useful to integrated optics. N b ^ and L iN b 03 already have applications in waveguiding devices, such as electro-optic modulators, Fresnel lenses, and SAW transducers. In several cases, however, it would be desirable to grow these oxides on lattice-matched substrates as epitaxial thin films of controlled composition, crystallinity, and thickness: this thesis describes work aimed at achieving this goal.
  • SYNTHESES Volume XIV Editors AARON WOLD JOHN K

    SYNTHESES Volume XIV Editors AARON WOLD JOHN K

    INORGANIC SYNTHESES Volume XIV Editors AARON WOLD JOHN K. RUFF Professor of Engineering Associate Professor of Chemistry and Chemistry University of Georgia Brown University, Providence, R.I. Athens, Ca. INORGANIC SYNTHESES Volume XIV McCRAW-HILL BOOK COMPANY New York St. Louis San Francisco Diisseldorf Johannesburg Kualo Lumpur London Mexico Montreal New Delhi Panama Rio de Janeiro Singapore Sydney Toronto INORGANIC SYNTHESES, VOLUME XIV Copyright 0 1973 by McGraw-Hill, Inc. All Rights Rewved. Printed in the United States of America. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise. without the prior written permission of the publisher. Library of Congress Catalog Card Number 39-23015 07-07 1320-0 1234567890 KPKP 76543 To RONALD NYHOLM and DAVID WADSLEY CONTENTS Reface ........................................... xi Notice to Contributors ................................... xiii Chapter One PHOSPHORUS COMPOUNDS ............... 1 1 . Phosphine ....................................... 1 2 . tert-Butyldichlorophosphineand Di-tert-butylchlorophosphinc......... 4 A . tert-Butyldichlorophosphinc ......................... 5 B . Di-tert-butylchlorophosphinc ......................... 6 3. 1.2-Bis(phosphino)ethane ............................. 10 4 . Tctramcthyldiphosphineand Flexible Aliphatic (Dimethylphosphino) Ligands ........................... 14 A . TetramethyldiphosFhine............................. 15 B .
  • Chemical Names and CAS Numbers Final

    Chemical Names and CAS Numbers Final

    Chemical Abstract Chemical Formula Chemical Name Service (CAS) Number C3H8O 1‐propanol C4H7BrO2 2‐bromobutyric acid 80‐58‐0 GeH3COOH 2‐germaacetic acid C4H10 2‐methylpropane 75‐28‐5 C3H8O 2‐propanol 67‐63‐0 C6H10O3 4‐acetylbutyric acid 448671 C4H7BrO2 4‐bromobutyric acid 2623‐87‐2 CH3CHO acetaldehyde CH3CONH2 acetamide C8H9NO2 acetaminophen 103‐90‐2 − C2H3O2 acetate ion − CH3COO acetate ion C2H4O2 acetic acid 64‐19‐7 CH3COOH acetic acid (CH3)2CO acetone CH3COCl acetyl chloride C2H2 acetylene 74‐86‐2 HCCH acetylene C9H8O4 acetylsalicylic acid 50‐78‐2 H2C(CH)CN acrylonitrile C3H7NO2 Ala C3H7NO2 alanine 56‐41‐7 NaAlSi3O3 albite AlSb aluminium antimonide 25152‐52‐7 AlAs aluminium arsenide 22831‐42‐1 AlBO2 aluminium borate 61279‐70‐7 AlBO aluminium boron oxide 12041‐48‐4 AlBr3 aluminium bromide 7727‐15‐3 AlBr3•6H2O aluminium bromide hexahydrate 2149397 AlCl4Cs aluminium caesium tetrachloride 17992‐03‐9 AlCl3 aluminium chloride (anhydrous) 7446‐70‐0 AlCl3•6H2O aluminium chloride hexahydrate 7784‐13‐6 AlClO aluminium chloride oxide 13596‐11‐7 AlB2 aluminium diboride 12041‐50‐8 AlF2 aluminium difluoride 13569‐23‐8 AlF2O aluminium difluoride oxide 38344‐66‐0 AlB12 aluminium dodecaboride 12041‐54‐2 Al2F6 aluminium fluoride 17949‐86‐9 AlF3 aluminium fluoride 7784‐18‐1 Al(CHO2)3 aluminium formate 7360‐53‐4 1 of 75 Chemical Abstract Chemical Formula Chemical Name Service (CAS) Number Al(OH)3 aluminium hydroxide 21645‐51‐2 Al2I6 aluminium iodide 18898‐35‐6 AlI3 aluminium iodide 7784‐23‐8 AlBr aluminium monobromide 22359‐97‐3 AlCl aluminium monochloride
  • Interagency Committee on Chemical Management

    Interagency Committee on Chemical Management

    DECEMBER 14, 2018 INTERAGENCY COMMITTEE ON CHEMICAL MANAGEMENT EXECUTIVE ORDER NO. 13-17 REPORT TO THE GOVERNOR WALKE, PETER Table of Contents Executive Summary ...................................................................................................................... 2 I. Introduction .......................................................................................................................... 3 II. Recommended Statutory Amendments or Regulatory Changes to Existing Recordkeeping and Reporting Requirements that are Required to Facilitate Assessment of Risks to Human Health and the Environment Posed by Chemical Use in the State ............................................................................................................................ 5 III. Summary of Chemical Use in the State Based on Reported Chemical Inventories....... 8 IV. Summary of Identified Risks to Human Health and the Environment from Reported Chemical Inventories ........................................................................................................... 9 V. Summary of any change under Federal Statute or Rule affecting the Regulation of Chemicals in the State ....................................................................................................... 12 VI. Recommended Legislative or Regulatory Action to Reduce Risks to Human Health and the Environment from Regulated and Unregulated Chemicals of Emerging Concern ..............................................................................................................................
  • Transition Metal Oxides

    Transition Metal Oxides

    . _ ^ ^ „ OCT 14 1975 175118 '-cy NSRDS-NBS 49 Transition Metal Oxides U.S. DEPARTMENT OF COMMERCE/National Bureau of Standards NSRDS Ice dat* Crystal Chemistry, Phase Transition and Related Aspects NATIONAL BUREAU OF STANDARDS The National Bureau of Standards 1 was established by an act of Congress March 3, 1901. The Bureau’s overall goal is to strengthen and advance the Nation’s science and technology and facilitate their effective application for public benefit. To this end, the Bureau conducts research and provides: (1) a basis for the Nation’s physical measurement system, (2) scientific and technological services for industry and government, (3) a technical basis for equity in trade, and (4) technical services to promote public safety. The Bureau consists of the Institute for Basic Standards, the Institute for Materials Research, the Institute for Applied Technology, the Institute for Computer Sciences and Technology, and the Office for Information Programs. THE INSTITUTE FOR BASIC STANDARDS provides the central basis within the United States of a complete and consistent system of physical measurement; coordinates that system with measurement systems of other nations; and furnishes essential services leading to accurate and uniform physical measurements throughout the Nation’s scientific community, industry, and commerce. The Institute consists of a Center for Radiation Research, an Office of Meas- urement Services and the following divisions: Applied Mathematics — Electricity — Mechanics — Heat — Optical Physics — Nuclear Sciences 2 — Applied Radiation 2 — Quantum Electronics 3 — Electromagnetics 3 — Time 3 3 3 and Frequency — Laboratory Astrophysics — Cryogenics . THE INSTITUTE FOR MATERIALS RESEARCH conducts materials research leading to improved methods of measurement, standards, and data on the properties of well-characterized materials needed by industry, commerce, educational institutions, and Government; provides advisory and research services to other Government agencies; and develops, produces, and distributes standard reference materials.
  • The Effect of Stress on the Low-Temperature Oxidation of Niobium Lawrence John Weirick Iowa State University

    The Effect of Stress on the Low-Temperature Oxidation of Niobium Lawrence John Weirick Iowa State University

    Iowa State University Capstones, Theses and Retrospective Theses and Dissertations Dissertations 1969 The effect of stress on the low-temperature oxidation of niobium Lawrence John Weirick Iowa State University Follow this and additional works at: https://lib.dr.iastate.edu/rtd Part of the Metallurgy Commons Recommended Citation Weirick, Lawrence John, "The effect of stress on the low-temperature oxidation of niobium " (1969). Retrospective Theses and Dissertations. 3617. https://lib.dr.iastate.edu/rtd/3617 This Dissertation is brought to you for free and open access by the Iowa State University Capstones, Theses and Dissertations at Iowa State University Digital Repository. It has been accepted for inclusion in Retrospective Theses and Dissertations by an authorized administrator of Iowa State University Digital Repository. For more information, please contact [email protected]. This dissertation has been microfihned exactly as received 69-20,683 WEIRICK, Lawrence John, 1941- THE EFFECT OF STRESS ON THE LOW- TEMPERATURE OXIDATION OF NIOBIUM. Iowa State University, Ph.D., 1969 Engineering, metallurgy University Microfilms, Inc., Ann Arbor, Michigan THE EFFECT OF STRESS ON THE LOW-TEMPERATURE OXIDATION OF NIOBIUM by Lawrence John Weirick A Dissertation Submitted to the Graduate Faculty in Partial Fulfillment of The Requirements for the Degree of DOCTOR OF PHILOSOPHY Major Subject: Metallurgy Approved: Signature was redacted for privacy. In Charge of Major Work Signature was redacted for privacy. Signature was redacted for privacy. uate
  • The Preparation and Characterization of Some Alkanethiolatoosmium Compounds Harold Harris Schobert Iowa State University

    The Preparation and Characterization of Some Alkanethiolatoosmium Compounds Harold Harris Schobert Iowa State University

    Iowa State University Capstones, Theses and Retrospective Theses and Dissertations Dissertations 1970 The preparation and characterization of some alkanethiolatoosmium compounds Harold Harris Schobert Iowa State University Follow this and additional works at: https://lib.dr.iastate.edu/rtd Part of the Inorganic Chemistry Commons Recommended Citation Schobert, Harold Harris, "The preparation and characterization of some alkanethiolatoosmium compounds " (1970). Retrospective Theses and Dissertations. 4357. https://lib.dr.iastate.edu/rtd/4357 This Dissertation is brought to you for free and open access by the Iowa State University Capstones, Theses and Dissertations at Iowa State University Digital Repository. It has been accepted for inclusion in Retrospective Theses and Dissertations by an authorized administrator of Iowa State University Digital Repository. For more information, please contact [email protected]. 71-14,258 SCHOBERT, Harold Harris, 1943- THE PREPARATION AND CHARACTERIZATION OF SOME ALKANETHIOLATOOSMIUM COMPOUNDS. Iowa State University, Ph.D., 1970 Chemistry, inorganic University Microfilms, A XEROX Company, Ann Arbor, Michigan THIS DISSERTATION HAS BEEH MICROFILMED EXACTLY AS RECEIVED THE PREPARATION AND CHARACTERIZATION OF SOME ALKANETHIOLATOOSMIUM COMPOUNDS by Harold Harris Schobert A Dissertation Submitted to the Graduate Faculty in Partial Fulfillment of The Requirements for the Degree of DOCTOR OF PHILOSOPHY Major Subject: Inorganic Chemistry Approved: Signature was redacted for privacy. Signature was redacted for
  • Hazardous Laboratory Chemicals Disposal Guide

    Hazardous Laboratory Chemicals Disposal Guide

    Third Edition HAZARDOUS LABORATORY CHEMICALS DISPOSAL GUIDE Third Edition HAZARDOUS LABORATORY CHEMICALS DISPOSAL GUIDE Margaret-Ann Armour LEWIS PUBLISHERS A CRC Press Company Boca Raton London New York Washington, D.C. This edition published in the Taylor & Francis e-Library, 2005. To purchase your own copy of this or any of Taylor & Francis or Routledge’s collection of thousands of eBooks please go to http://www.ebookstore.tandf.co.uk/. Library of Congress Cataloging-in-Publication Data Armour, M.A. (Margaret-Ann) Hazardous laboratory chemicals disposal guide/Margaret-Ann Armour.—3rd ed. p. cm. Includes bibliographical references. ISBN 1-56670-567-3 1. Chemical laboratories—Waste disposal. 2. Hazardous substances. I. Title. QD64.A76 2003 542′.89–dc21 2002043358 This book contains information obtained from authentic and highly regarded sources. Reprinted material is quoted with permission, and sources are indicated. A wide variety of references are listed. Reasonable efforts have been made to publish reliable data and information, but the authors and the publisher cannot assume responsibility for the validity of all materials or for the consequences of their use. Neither this book nor any part may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, microfilming, and recording, or by any information storage or retrieval system, without prior permission in writing from the publisher. The consent of CRC Press LLC does not extend to copying for general distribution, for promotion, for creating new works, or for resale. Specific permission must be obtained in writing from CRC Press LLC for such copying. Direct all inquiries to CRC Press LLC, 2000 N.W.