3D Manufacturing of Glass Microstructures Using Femtosecond Laser
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Thermal Shock
TEACHER INSTRUCTIONS Thermal Shock Objective: To illustrate thermal expansion and thermal shock. Background Information: In physics, thermal expansion is the tendency of matter to increase in volume or pressure when heated. For liquids and solids, the amount of expansion will normally vary depending on the material’s coefficient of thermal expansion. When materials contract, tensile forces are created. When things expand, compressive forces are created. Thermal shock is the name given to cracking as a result of rapid temperature change. From the laboratory standpoint, there are three main types of glass used today: borosilicate, quartz, and soda lime or flint glass. Borosilicate glass is made to withstand thermal shock better than most other glass through a combination of reduced expansion coefficient and greater strength, though fused quartz outperforms it in both respects. Some glass-ceramic materials include a controlled proportion of material with a negative expansion coefficient, so that the overall coefficient can be reduced to almost exactly zero over a reasonably wide range of temperatures. Improving the shock resistance of glass and ceramics can be achieved by improving the strength of the materials or by reducing its tendency to uneven expansion. One example of success in this area is Pyrex, the brand name that is well known to most consumers as cookware, but which is also used to manufacture laboratory glassware. Pyrex traditionally is made with a borosilicate glass with the addition of boron, which prevents shock by reducing the tendency of glass to expand. Demo description: Three different types of glass rods will be heated so that students can observe the amount of thermal shock that occurs. -
Thermal Behaviour and Excess Entropy of Bioactive Glasses and Zn-Doped Glasses
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by HAL-Rennes 1 Thermal behaviour and excess entropy of bioactive glasses and Zn-doped glasses. Eric Wers, Hassane Oudadesse To cite this version: Eric Wers, Hassane Oudadesse. Thermal behaviour and excess entropy of bioactive glasses and Zn-doped glasses.. Journal of Thermal Analysis and Calorimetry, Springer Verlag (Germany), 2013, pp.1-8. <10.1007/s10973-013-3280-3>. <hal-00914284> HAL Id: hal-00914284 https://hal.archives-ouvertes.fr/hal-00914284 Submitted on 5 Dec 2013 HAL is a multi-disciplinary open access L'archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destin´eeau d´ep^otet `ala diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publi´esou non, lished or not. The documents may come from ´emanant des ´etablissements d'enseignement et de teaching and research institutions in France or recherche fran¸caisou ´etrangers,des laboratoires abroad, or from public or private research centers. publics ou priv´es. J Therm Anal Calorim (2013) p: 1–8 DOI 10.1007/s10973-013-3280-3 Thermal behaviour and excess entropy of bioactive glasses and Zn-doped glasses E. Wers, H. Oudadesse ( ✉) Received: 22 March 2013 / Accepted: 4 June 2013 E. Wers, H. Oudadesse ( ✉) SCR, UMR CNRS 6226, University of Rennes 1, 263 av. du Général Leclerc, 35042 Rennes Cedex, France Abstract Bioactive glasses prepared in SiO 2–CaO–Na 2O and P 2O5 system are used as biomaterials in orthopaedic and maxillofacial surgery. -
Transport-Of-Intensity-Based Phase Imaging to Quantify the Refractive Index Response of 3D Direct- Write Lithography
University of Colorado, Boulder CU Scholar Electrical, Computer & Energy Engineering Faculty Electrical, Computer & Energy Engineering Contributions 1-22-2018 Transport-of-intensity-based phase imaging to quantify the refractive index response of 3D direct- write lithography. David J Glugla Madeline B Chosy Marvin D Alim Amy C Sullivan Robert R McLeod Follow this and additional works at: https://scholar.colorado.edu/ecen_facpapers This Article is brought to you for free and open access by Electrical, Computer & Energy Engineering at CU Scholar. It has been accepted for inclusion in Electrical, Computer & Energy Engineering Faculty Contributions by an authorized administrator of CU Scholar. For more information, please contact [email protected]. Vol. 26, No. 2 | 22 Jan 2018 | OPTICS EXPRESS 1851 Transport-of-intensity-based phase imaging to quantify the refractive index response of 3D direct-write lithography 1,* 2 3 DAVID J. GLUGLA, MADELINE B. CHOSY, MARVIN D. ALIM, AMY C. 1 1,3 SULLIVAN, AND ROBERT R. MCLEOD 1Department of Electrical, Computer, and Energy Engineering, University of Colorado Boulder, Boulder, CO 80309, USA 2Department of Chemistry, Carleton College, Northfield, MN 55057, USA 3Materials Science and Engineering Program, University of Colorado Boulder, Boulder, CO 80309, USA *[email protected] Abstract: Precise direct-write lithography of 3D waveguides or diffractive structures within the volume of a photosensitive material is hindered by the lack of metrology that can yield predictive models for the micron-scale refractive index profile in response to a range of exposure conditions. We apply the transport of intensity equation in conjunction with confocal reflection microscopy to capture the complete spatial frequency spectrum of isolated 10 μm-scale gradient-refractive index structures written by single-photon direct-write laser lithography. -
Journal of Orthodontics and Craniofacial Research
Journal of Orthodontics and Craniofacial Research Masood H. J Orthod Craniofac Res 2: 109. Research Article DOI: 10.29011/JOCR-109.100109 The Effect of Bioactive Glasses in Air Abrasion Procedures Masood H, Gillam D*, Hill RG Oral Bioengineering, Institute of Dentistry, Barts and the London School of Medicine and Dentistry, Queen Mary University, London, UK *Corresponding author: David Gillam, Oral Bioengineering, Institute of Dentistry, Bart’s and the London School of Medicine and Dentistry, Queen Mary University, London, UK Citation: Masood H, Gillam D, Hill RG. (2020) The Effect of Bioactive Glasses in Air Abrasion Procedures. J Orthod Craniofac Res 2: 109. DOI: 10.29011/JOCR-109.100109 Received Date: 14 July 2020; Accepted Date: 24 July 2020; Published Date: 31 July 2020 Abstract Objective: To analyse the effect of particle size and shape of a new bioactive glass BioMinF on air abrasion compared to an air polishing powder (Sylc) using an enamel substitute material (Macor®). Method: The materials used in the study were: 1) Macor, (Precision Ceramics UK) 2) BioMinF: 500gm of glass frit (Cera Dynamics Ltd, UK) and 3) Sylc: Sylc 45S5 glass (Velopex International, UK). An AquaCare Air Abrasion & Polishing System (Velopex) with a hand piece with a 0.8 mm diameter tip was used with a 2mm thick Macor sheet with a feed rate of 1 and an air pressure of 2 bar. The BioMinF glass was milled for 45 seconds in five batches each containing 100 gm of BioMinF frit using a milling machine (Gy-Ro Mill, Glen Creston, and London). The angular particles produced were separated using different sieves to produce <38 micron, 38-63 microns, 63-80 microns, 80-125 microns and 125-250 microns particle size(s) respectively. -
Fabrication of Integrated Optofluidic Circuits in Chalcogenide Glass Using Femtosecond Laser Direct Writing
University of Central Florida STARS Electronic Theses and Dissertations, 2004-2019 2010 Fabrication Of Integrated Optofluidic Circuits In Chalcogenide Glass Using Femtosecond Laser Direct Writing Troy P. Anderson University of Central Florida Part of the Electromagnetics and Photonics Commons, and the Optics Commons Find similar works at: https://stars.library.ucf.edu/etd University of Central Florida Libraries http://library.ucf.edu This Doctoral Dissertation (Open Access) is brought to you for free and open access by STARS. It has been accepted for inclusion in Electronic Theses and Dissertations, 2004-2019 by an authorized administrator of STARS. For more information, please contact [email protected]. STARS Citation Anderson, Troy P., "Fabrication Of Integrated Optofluidic Circuits In Chalcogenide Glass Using Femtosecond Laser Direct Writing" (2010). Electronic Theses and Dissertations, 2004-2019. 1518. https://stars.library.ucf.edu/etd/1518 FABRICATION OF INTEGRATED OPTOFLUIDIC CIRCUITS IN CHALCOGENIDE GLASS USING FEMTOSECOND LASER DIRECT WRITING by TROY P. ANDERSON B.S. University of Nebraska – Lincoln, 2004 M.S. University of Central Florida, 2007 A dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the College of Optics at the University of Central Florida Orlando, Florida Spring Term 2010 Major Professor: Martin Richardson © 2010 Troy Anderson ii ABSTRACT Femtosecond laser direct writing (FLDW) is a versatile process that uses focused femtosecond pulses to modify the physical structure of a material, which can result in a shift of optical properties such as the linear and nonlinear refractive index. If the photon energy of the femtosecond pulses lies below the material bandgap, nonlinear absorption rather than linear absorption becomes the dominant mechanism of energy transfer to the material. -
Glass Ionomer Bone Cements Based on Magnesium-Containing Bioactive
Biomed. Glasses 2019; 5:1–12 Research Article Roland Wetzel, Leena Hupa, and Delia S. Brauer* Glass ionomer bone cements based on magnesium-containing bioactive glasses https://doi.org/10.1515/bglass-2019-0001 Received Sep 25, 2018; revised Dec 16, 2018; accepted Jan 14, 2019 1 Introduction Abstract: Glass ionomer cements (GIC) are used in restora- Cements for prosthetic stabilisation or spinal corrective tive dentistry and their properties (low heat during setting, surgeries (vertebroplasty, kyphoplasty) typically consist adhesion to mineralised tissue and surgical metals) make of polymethylmethacrylate [1, 2]. They exhibit a number them of great interest for bone applications. However, den- of drawbacks which include high curing temperatures tal GIC are based on aluminium-containing glasses, and or the presence of unreacted and toxic methacrylic acid the resulting release of aluminium ions from the cements monomers. They also do not bind to bone and are held in needs to be avoided for applications as bone cements. Re- place by mechanical interlocking only [2–6]. As a result, placing aluminium ions in glasses for use in glass ionomer there is a demand for alternative non-toxic cements with cements is challenging, as aluminium ions play a critical bone bonding capability. role in the required glass degradation by acid attack as Glass ionomer cements (GIC) have been used in well as in GIC mechanical stability. Magnesium ions have restorative dentistry as filler or luting materials for been used as an alternative for aluminium in the glass decades [7, 8]. They are formed by an acid-base reaction component, but so far no systematic study has looked into between a polymeric acid and an acid-degradable fluoro- the actual role of magnesium ions. -
Elaboration and Optimization of Tellurite-Based Materials for Raman Gain Application Guillaume Guéry
Elaboration and Optimization of Tellurite-based Materials for Raman Gain Application Guillaume Guéry To cite this version: Guillaume Guéry. Elaboration and Optimization of Tellurite-based Materials for Raman Gain Ap- plication. Other. Université Sciences et Technologies - Bordeaux I; Clemson University. Materials science and engineering, 2013. English. NNT : 2013BOR14808. tel-00868798 HAL Id: tel-00868798 https://tel.archives-ouvertes.fr/tel-00868798 Submitted on 2 Oct 2013 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. THÈSE PRÉSENTÉE A L’UNIVERSITÉ BORDEAUX 1 ÉCOLE DOCTORALE DES SCIENCES CHIMIQUES Par Guillaume GUERY POUR OBTENIR LE GRADE DE DOCTEUR SPÉCIALITÉ : Physique et Chimie de la Matière Condensée Elaboration and Optimization of Tellurite-based Materials for Raman Gain Application Directeurs de recherche: M. Thierry CARDINAL, M. Vincent RODRIGUEZ, Mme Kathleen RICHARDSON Soutenue le: 28 Juin 2013 Devant la commission d’examen formée de: M. SIMON, Patrick Directeur de recherche – CEMHTI - CNRS Rapporteur M. MAGLIONE, Mario Directeur de recherche- ICMCB – CNRS Président Mme. RIVERO, Clara Chargée de recherche - Lockheed Examinateur M. SUNDARAM, S.K Professeur – Alfred University Examinateur Mme. RICHARDSON, Kathleen Professeur – University of Central Florida Examinateur M. RODRIGUEZ, Vincent Professeur - ISM - Université Bordeaux 1 Examinateur M. -
The American Ceramic Society 25Th International Congress On
The American Ceramic Society 25th International Congress on Glass (ICG 2019) ABSTRACT BOOK June 9–14, 2019 Boston, Massachusetts USA Introduction This volume contains abstracts for over 900 presentations during the 2019 Conference on International Commission on Glass Meeting (ICG 2019) in Boston, Massachusetts. The abstracts are reproduced as submitted by authors, a format that provides for longer, more detailed descriptions of papers. The American Ceramic Society accepts no responsibility for the content or quality of the abstract content. Abstracts are arranged by day, then by symposium and session title. An Author Index appears at the back of this book. The Meeting Guide contains locations of sessions with times, titles and authors of papers, but not presentation abstracts. How to Use the Abstract Book Refer to the Table of Contents to determine page numbers on which specific session abstracts begin. At the beginning of each session are headings that list session title, location and session chair. Starting times for presentations and paper numbers precede each paper title. The Author Index lists each author and the page number on which their abstract can be found. Copyright © 2019 The American Ceramic Society (www.ceramics.org). All rights reserved. MEETING REGULATIONS The American Ceramic Society is a nonprofit scientific organization that facilitates whether in print, electronic or other media, including The American Ceramic Society’s the exchange of knowledge meetings and publication of papers for future reference. website. By participating in the conference, you grant The American Ceramic Society The Society owns and retains full right to control its publications and its meetings. -
Celebrating 100 Years
AMERICANa CERAMICting SOCIETY ars Celebr 100 ye bullemerginge ceramicstin & glass technology SEPTEMBER 2021 Laser-driven chemical vapor deposition for high-performance fibers and powders New issue inside: SEPTEMBER 2021 • VOLUME 2 • ISSUE 3 www.ceramics.org/ceramicandglassmanufacturing THE VALUE OF COLLABORATION: PARTNERSHIPS ARE A PATH TO SUCCESS ABET ENSURES QUALITY IN UNIVERSITY ENGINEERING EDUCATION ACerS Awards of 2021 | Coe College glass research | Big science in aerospace When it Comes to Heat, We Sweat the Details! Your firing needs are unique. Our laboratory can run tests to So why use an “off the shelf” help identify your process kiln in your process? boundaries. Through our toll firing facility, we can At Harrop, we get it. help to further define That’s why, for over a the equipment/ century, we’ve been processing putting in the hard work combination that to design and service works best for your custom kilns. Is it harder material. And if you to do things this way? are not ready for a Yes. Is the extra effort new kiln, we can toll worth it? You bet! fire your material to help meet your At Harrop, we don’t production needs. stop there. If you aren’t sure what you Does your current need, we can help. kiln company sweat the details? www.harropusa.com 1.614.231.3621 Harrop Ad Sweat the Details ACerS Full Size w 100 logo.indd 1 5/21/20 9:33 AM contents September 2021 • Vol. 100 No.7 feature articles department Announcing ACerS Awards of 2021 News & Trends . 3 29 The Society will honor members and corporations at the Spotlight . -
Spectroscopic Properties of Erbium-Doped Oxyfluoride Phospho-Tellurite Glass and Transparent Glass-Ceramic Containing Baf2 Nanoc
materials Article Spectroscopic Properties of Erbium-Doped Oxyfluoride Phospho-Tellurite Glass and Transparent Glass-Ceramic Containing BaF2 Nanocrystals Magdalena Lesniak 1,* , Jacek Zmojda 2, Marcin Kochanowicz 2 , Piotr Miluski 2 , Agata Baranowska 3 , Gabriela Mach 1, Marta Kuwik 4, Joanna Pisarska 4, Wojciech A. Pisarski 4 and Dominik Dorosz 1 1 Faculty of Materials Science and Ceramics, AGH University of Science and Technology, Av. Mickiewicza 30, 30059 Krakow, Poland; [email protected] (G.M.); [email protected] (D.D.) 2 Faculty of Electrical Engineering, Bialystok University of Technology, Wiejska Street 45D, 15351 Bialystok, Poland; [email protected] (J.Z.); [email protected] (M.K.); [email protected] (P.M.) 3 Faculty of Mechanical Engineering, Bialystok University of Technology, Wiejska Street 45C, 15351 Bialystok, Poland; [email protected] 4 Institute of Chemistry, University of Silesia, Szkolna 9, 40007 Katowice, Poland; [email protected] (M.K.); [email protected] (J.P.); [email protected] (W.A.P.) * Correspondence: [email protected] Received: 21 August 2019; Accepted: 17 October 2019; Published: 20 October 2019 Abstract: The ErF3-doped oxyfluoride phospho-tellurite glasses in the (40-x) TeO2-10P2O5-45 (BaF2-ZnF2) -5Na2O-xErF3 system (where x = 0.25, 0.50, 0.75, 1.00, and 1.25 mol%) have been prepared by the conventional melt-quenching method. The effect of erbium trifluoride addition on thermal, structure, and spectroscopic properties of oxyfluoride phospho-tellurite precursor glass was studied by differential scanning calorimetry (DSC), Fourier-transform infrared (FTIR), and Raman spectroscopy as well as emission measurements, respectively. -
The Beneficial Mechanical and Biological Outcomes of Thin Copper-Gallium Doped Silica-Rich Bio-Active Glass Implant-Type Coatings
coatings Article The Beneficial Mechanical and Biological Outcomes of Thin Copper-Gallium Doped Silica-Rich Bio-Active Glass Implant-Type Coatings George E. Stan 1,* , Teddy Tite 1, Adrian-Claudiu Popa 1, Iuliana Maria Chirica 1, Catalin C. Negrila 1, Cristina Besleaga 1 , Irina Zgura 1, Any Cristina Sergentu 1, Gianina Popescu-Pelin 2 , Daniel Cristea 3, Lucia E. Ionescu 4, Marius Necsulescu 4 , Hugo R. Fernandes 5 and José M. F. Ferreira 5 1 National Institute for Materials Physics, RO-077125 Magurele, Romania; teddy.tite@infim.ro (T.T.); [email protected] (A.-C.P.); iuliana.bogdan@infim.ro (I.M.C.); catalin.negrila@infim.ro (C.C.N.); cristina.besleaga@infim.ro (C.B.); irina.zgura@infim.ro (I.Z.); [email protected] (A.C.S.) 2 National Institute for Lasers, Plasma and Radiation Physics, RO-077125 Magurele, Romania; gianina.popescu@inflpr.ro 3 Faculty of Materials Science and Engineering, Transilvania University of Brasov, 500068 Brasov, Romania; [email protected] 4 Army Centre for Medical Research, RO-020012 Bucharest, Romania; [email protected] (L.E.I.); [email protected] (M.N.) 5 Department of Materials and Ceramics Engineering, CICECO, University of Aveiro, 3810-193 Aveiro, Portugal; [email protected] (H.R.F.); [email protected] (J.M.F.F.) * Correspondence: george_stan@infim.ro; Tel.: +40-21-241-8128 Received: 12 October 2020; Accepted: 18 November 2020; Published: 20 November 2020 Abstract: Silica-based bioactive glasses (SBG) hold great promise as bio-functional coatings of metallic endo-osseous implants, due to their osteoproductive potential, and, in the case of designed formulations, suitable mechanical properties and antibacterial efficacy. -
The Effects of Copper Addition on the Structure and Antibacterial
bioRxiv preprint doi: https://doi.org/10.1101/2020.01.24.918524; this version posted January 25, 2020. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under aCC-BY 4.0 International license. The Effects of Copper Addition on The Structure and Antibacterial Properties of Biomedical Glasses Leyla Mojtabavi1, Amir Razavi1* 1University of Tehran, Department of Engineering Science, Enghelab Ave, Tehran, Iran 111554563 Address for Correspondence: Department of Engineering Science, University of Tehran, Enghelab Ave, Tehran, Iran 111554563 Tel: +989147560142 Email: [email protected] This study was conducted to determine the effects that copper (Cu) has on the glass structure and antibacterial efficacy of a SiO2- CaO-Na2O-P2O5 bioactive glass composition. Copper is known to be an antibacterial agent, which could potentially be a safer alternative to doping materials with antibiotics. Additionally, the structural effects of copper in the glass were studied, as the glass structure plays an important role in its bioactivity in the physiological solutions. This leads to the possibility of achieving antibacterial glass that can serve as a bioactive glass for skeletal tissue. bioRxiv preprint doi: https://doi.org/10.1101/2020.01.24.918524; this version posted January 25, 2020. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under aCC-BY 4.0 International license.