Control of Pyrotechnic Burn Rate
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Thermal Analysis and Stability of Boron/Potassium Nitrate
applied sciences Article Thermal Analysis and Stability of Boron/Potassium ◦ Nitrate Pyrotechnic Composition at 180 C Chaozhen Li 1 , Nan Yan 1,*, Yaokun Ye 2, Zhixing Lv 3, Xiang He 1, Jinhong Huang 4 and Nan Zhang 4 1 State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China 2 Beijing Space Vehicle General Design Department, China Academy of Space Technology, Beijing 100094, China 3 Safety Technology Research Institute of Ordnance Industry, Beijing 100053, China 4 R & D Center, Liaoning North Huafeng Special Chemistry Co. Ltd., Fushun 113003, China * Correspondence: [email protected]; Tel.: +86-010-6891-2537 Received: 4 August 2019; Accepted: 29 August 2019; Published: 3 September 2019 Featured Application: This research aims to obtain the decomposition process of boron/potassium nitrate pyrotechnic composition, and verify its high temperature stability to meet the charge requirements of the separation device such as the cutter for the lunar probe. Abstract: Aerospace missions require that pyrotechnic compositions are able to withstand 180 ◦C. Therefore, this paper studies the thermal stability and output performance of boron/potassium nitrate (abbreviated BPN) used in pyrotechnic devices. Firstly, differential scanning calorimetry (DSC) and thermogravimetric (TG) tests are used to analyze the thermal reaction process of KNO3, boron, and BPN to qualitatively judge their thermal stability. Then, apparent morphology analysis, component analysis, and the p-t curve test, which is the closed bomb test to measure the output power of the pyrotechnic composition, are carried out with BPN samples before and after the high-temperature test to verify BPN stability at 180 ◦C. -
ENCYCLOPEDIA of CHEMISTRY & EXPLOSIVES MATERIALS Abelite
ENCYCLOPEDIA OF CHEMISTRY & EXPLOSIVES MATERIALS A Abelite An explosive, composed mainly of ammonium nitrate and trinitrotoluene. Absolute Zero The least possible temperature for all substances. Generally accepted as -273.15ÝC AC Alternating current. Acceptance Quality Level (AQL) A nominal value expressed in terms of percentage defective per hundred units, by which a group of sampling plans is identified. The sampling plans so identified have a high probability of accepting lots containing material with a process average not greater than the designed value of the AQL. Acetin [CH3COOC3H5(OH)2] also known as glyceryl monoacetate, a colourless hydroscopic liquid. Used as an intermediate for various explosives, and a solvent for various dyes. Acetone [CH3COCH3] colourless, flammable liquid. Acetone is widely used in industry as a solvent for many organic substances. It is used in making synthetic Resins and fillers, smokeless powders, and many other organic compounds. Boiling Point 56ÝC. Useful solvent for acetylene, also known as the simplest saturated ketone. Acetylene or ethyne, a colourless gas and the simplest alkyne Hydrocarbon. Explosive on contact with air, it is stored dissolved under pressure in Acetone. It is used to make neoprene rubber, plastics, and resins. The oxyacetylene torch mixes and burns oxygen and acetylene to produce a very hot flame-as high as 3480ÝC (6300ÝF)-that can cut steel and weld iron and other metals. Produced by the action of wateron calcium carbide and catalytically from naphtha. Acetylide A carbide formed by bubbling acetylene through a metallic salt solution, eg cuprous acetylide, Cu2C2. These are violently explosive compounds. Acid Any substance capable of giving up a proton; a substance that ionizes in solution to give the positive ion of the solvent; a solution with a pH measurement less than 7. -
(12) Patent Application Publication (10) Pub. No.: US 2007/0068610 A1 Nickel (43) Pub
US 2007.006861 OA1 (19) United States (12) Patent Application Publication (10) Pub. No.: US 2007/0068610 A1 Nickel (43) Pub. Date: Mar. 29, 2007 (54) MICROCRYSTALLINE NITROCELLULOSE Publication Classification PYROTECHNIC COMPOSITIONS (51) Int. Cl. (76) Inventor: Russell R. Nickel, Columbus, MT (US) C06B 45/10 (2006.01) (52) U.S. Cl. ............................................................ 149/19.8 Correspondence Address: PSERIEDER, WOODRUFF & (57) ABSTRACT 12412 POWERSCOURT DRIVE SUTE 200 ST. LOUIS, MO 63131-3615 (US) A. pyrotechnic composition comprising microcrystalline nitrocellulose which is characterized as an ultra low-smoke (21) Appl. No.: 11/469,936 composition. The pyrotechnic composition includes at least one flame coloring agent, and may be produced with or (22) Filed: Sep. 5, 2006 without an optional oxidizing agent, with or without an optional metal powder, with or without an optional chlorine Related U.S. Application Data donor. Upon combustion, the pyrotechnic composition pro duces illuminating emissions having desired colors and (63) Continuation-in-part of application No. 11/058,677, luminosity characteristics with significantly reduced or toxic filed on Feb. 15, 2005. combustion products and Smoke. US 2007/006861.0 A1 Mar. 29, 2007 MCROCRYSTALLINE NITROCELLULOSE may include at least one compound selected from a group PYROTECHNIC COMPOSITIONS consisting of ammonium perchlorate, alkali metal perchlo rates, alkali metal chlorates, alkali metal nitrates and alka CROSS-REFERENCE TO RELATED line earth metal nitrates. Additional fuels may include car APPLICATIONS bon, titanium, titanium alloys, Zirconium, Zirconium alloys, 0001. The present application is a continuation-in-part of iron, alloys of iron, magnesium, alloys of magnesium, U.S. patent application Ser. No. -
WPA Newsletter, Volume 25, Issue 1
WPA Newsletter, Volume 25, Issue 1 Table of Contents Corporate Members 4 Editorials 5 Passages 8 Winter Blast Round-Up 12 Burro Races 16 Guest photographer Kelly 18 Maker Faire 27 Cover Picture - “BANG! BANG!” News from Here and There 28 Photo by Kelly Dreller DO IT announcement 31 Elected Officers of the WPA New Rocket Policy 33 President: Steve Wilson Moapa 33 Vice President: Greg Dandurand Blackfinger’s Insert Workshop 34 VP Publications: Pete Hand Treasurer: Richard Haase Secretary: Dennis Miele THE SMALL PRINT The Western Pyrotechnic Association, Inc., also known as the WPA, is a non-profit group of fireworks professionals and their apprentices. This newsletter is a vehicle for their exchange of information in this craft and the right to publish this information is guaranteed by the Constitution of the United States of America. Nonetheless, readers are urged to learn and obey all laws and regulations of all federal, state, and local jurisdictions and of their agencies and representatives. Some information herein may contain incom- plete descriptions of fireworks techniques based on the experience of its author(s) in a controlled environment with circumstances, and conditions different from the reader. Readers must form their own opinion as to the application of this information. This information is considered documentary in nature and no opinion is given as to its suitability or use. No warranties are made either expressed or implied, including but not limited to warranties of the accuracy of the information herein. The WPA is not responsible for the opinions of authors or mistakes in printing. All information is intended solely for viewing by members of the Western Pyrotechnic Association, Inc. -
Black Match” …………………………………………… P
Selected Pyrotechnic Publications of K.L. and B.J. Kosanke Part 5 (1998 through 2000) This book contains 134 pages Development of a Video Spectrometer …………………………………………… P. 435-445. Measurements of Glitter Flash Delay, Size and Duration ……………………… P. 446-449. Lift Charge Loss for a Shell to Remain in Mortar ……………………………… P. 450-450. Configuration and “Over-Load” Studies of Concussion Mortars ……………… P. 451-463. Quick Match – A Review and Study ……………………………………………… P. 464-479. Pyrotechnic Primes and Priming ………………………………………………… P. 480-495. Dud Shell Risk Assessment: NFPA Distances …………………………………… P. 496-499. Dud Shell Risk Assessment: Mortar Placement ………………………………… P. 500-503. Performance Study of Civil War Vintage Black Powder ……………………… P. 504-509. CAUTION: Very Fast “Black Match” …………………………………………… P. 510-512. Peak In-Mortar Aerial Shell Accelerations ……………………………………… P. 513-516. Firing Precision for Choreographed Displays …………………………………… P. 517-518. Sticky Match and Quick Match: Temperature Dependent Burn Times ……… P. 519-523. Mortar Separations in Troughs and Drums …………………………………… P. 524-530. Preliminary Study of the Effect of Ignition Stimulus on Aerial Shell Lift Performance …………………………………………………… P. 531-535. Pyrotechnic Particle Morphologies – Metal Fuels ……………………………… P. 536-542. Peak Mortar Pressures When Firing Spherical Aerial Shells …………………… P. 543-544. Indoor Pyrotechnic Electrostatic Discharge Hazard …………………………… P. 545-545. Pyrotechnic Particle Morphology – Low Melting Point Oxidizers ……………… P. 546-556. An earlier version -
Rushlight Index 1980-2006
Rushlight Cumulative Index, 1980 – 2006 Vol. 46 – 72 (Pages 2305 – 3951) Part 1: Subject Index Page 2 Part 2: Author Index Page 21 Part 3: Illustration Index Page 25 Notes: The following conventions are used in this index: a slash (/) after the page number indicates the item is an illustration with little or no text. MA before an entry indicates a notice of a magazine article; BR indicates a book review. Please note that if issues were mispaginated, the corrected page numbers are used in this index. The following chart lists the range of pages in each volume of the Rushlight covered by this index. Volume Range of Pages Volume Range of Pages 46 (1980) 2305-2355 60 (1994) 3139-3202 47 (1981) 2356-2406a 61 (1995) 3203-3261 48 (1982) 2406b-2465 62 (1996) 3262-3312 49 (1983) 2465a-2524 63 (1997) 3313-3386 50 (1984) 2524a-2592 64 (1998) 3387-3434 51 (1985) 2593-2679 65 (1999) 3435-3512 52 (1986) 2680-2752 66 (2000) 3513-3569 53 (1987) 2753-2803 67 (2001) 3570-3620 54 (1988) 2804-2851 68 (2002) 3621-3687 55 (1989) 2852-2909 69 (2003) 3688-3745 56 (1990) 2910-2974 70 (2004) 3746-3815 57 (1991) 2974a-3032 71 (2005) 3816-3893 58 (1992) 3033-3083 72 (2006) 3894-3951 59 (1993) 3084-3138 1 Rushlight Subject Index Subject Page Andrews' burning fluid vapor lamps 3400-05 Abraham Gesner: Father of Kerosene 2543-47 Andrews patent vapor burner 3359/ Accessories for decorating lamps 2924 Andrews safety lamp, award refused 3774 Acetylene bicycle lamps, sandwich style 3071-79 Andrews, Solomon, 1831 gas generator 3401 Acetylene bicycle lamps, Solar 2993-3004 -
United States P Patented July 18, 1972
3,677,840 United States P Patented July 18, 1972 iodide of the invention is obtained in a highly active form 3,677,840 ideally suited for nucleating purposes. PYROTECHNICS COMPRISING OXDE OF SILVER The metathesis reaction proceeds substantially accord FOR WEATHERMODIFICATION USE ing to the following equation: Graham C. Shaw, Garland, and Russell Reed, Jr. Brigham City, Utah, assignors to Thiokol Chemical Corporation, Bristol, Pa. No Drawing. Filed Sept. 18, 1969, Ser. No. 859,165 In accordance with the invention, the pyrotechnic com int, C. C06d 3/00 o position comprises, by weight, the cured product produced U.S. C. 149-19 5 Claims by mixing and curing together from about 0.5% to about 10 20% of oxide of silver; from about 2% to about 45% of an alkali iodate present in about a stoichiometric amount ABSTRACT OF THE DISCLOSURE relative to the amount of oxide of silver present in the A pyrotechnic composition which upon combustion composition; from about 25% to about 75% of a solid in produces mixed silver halide nuclei for use in influencing organic oxidizer selected from the perchlorates and the weather comprises a composition made by curing a mix 5 nitrates of ammonium and of Group I-A and Group II-A ture comprising silver oxide, an alkali iodate, an alkali metals of the Periodic Table; and from about 10% to perchlorate and a curable oxygenated or fluorinated or about 20% of a curable, fluid polymer binder for pyro ganic liquid polymer binder. The composition burns technic compositions, especially a combined-halogen-rich smoothly to provide by metathesis a mixture of silver or combined-oxygen-rich polymer binder, preferably a halides as substantially the only solid or condensed phase 20 polyester-urethane terminated with amine or hydroxyl reaction products, and leaves substantially no residue. -
Manganese As Fuel in Slow-Burning Pyrotechnic Time Delay Compositions
Manganese as Fuel in Slow-Burning Pyrotechnic Time Delay Compositions 1 1 1∗ Darren Swanepoel , Olinto Del Fabbro and Walter W. Focke 1Institute of Applied Materials, Department of Chemical Engineering, University of Pretoria, Lynnwood Road, Pretoria, South Africa 2 † Corrie Conradie 2Research and Technology, African Explosives Limited, PO Modderfontein, 1645, South Africa Abstract Manganese metal was evaluated as a fuel for slow-burning delay compositions press- filled in aluminium or compaction-rolled in lead tubes. Oxides of antimony, bismuth, copper, manganese and vanadium were considered as oxidants. Measured burn rates for binary mixtures varied between 5 and 22 mm/s but slower burning ternary and quaternary compositions were also found. The addition of fumed silica to the Mn/MnO2 system had little effect on the propagation rate but a low level addition of hollow glass sphere significantly reduced the burn rate. Mn – MnO2 mixtures showed reliable burning over a wide stoichiometric range. In this system the fuel and the oxidant share a common metal. They combine to form the more stable intermediate oxide (MnO) releasing considerable quantities of heat in the process. Keywords: Pyrotechnics, Time delay, Manganese, Antimony oxide, Fumed silica 1 Introduction Commercial detonator delay element assemblies comprise an ignition source, a small- diameter tube containing a compacted pyrotechnic composition and an ignition transfer system [1, 2]. The pyrotechnic composition is a mixture of an oxidising agent and a fuel capable of an exothermic redox reaction. Following ignition, a combustion wave travels down along the tube at a constant velocity. This ensures the transmission of the initiation impulse to the detonator in a precisely adjustable time interval. -
Safety Guidelines of the PGI Official Fireworks Safety Guidelines in Effect at PGI Conventions Pyrotechnics Guild International, Inc
Safety Guidelines of the PGI Official Fireworks Safety Guidelines in effect at PGI Conventions Pyrotechnics Guild International, Inc. 2019 TABLE OF CONTENTS 1. Authority and Scope . 2 2. Safety Committee . 2 3. General Requirements . 3 4. Class B/1.3G Testing . 6 5. Competition . 7 6. Public Display Area . 8 7. Class C/1.4G Sales . 19 8. Class C/1.4G Shooting . 21 9. Auction . 23 10. Assembly of Pyrotechnic Devices . 23 11. Educational Workshops and Demonstrations . 24 12. Trade Show Sales . 24-25 13. Storage . 25 14. Minimum Distance From Spectators . 26 15. Anvil Firing . 28 16. Manufacturing . 28 2019 Committee for Safety Guideline Revision John Steinberg, Chairman Paul Smith Carol Hostetter Jim Beardmore Ruth Newhouse Beardmore 1. AUTHORITY AND SCOPE 1. These guidelines shall be known as the Official Fireworks Safety Guidelines and be cited as such. They shall be referred to herein as “The Guidelines.” 2. Authority: These guidelines were adopted by the Pyrotechnics Guild International, Inc. (PGI) in July 1983; revised July 1987, revised July 1990 [to incorporate changes to NFPA 1123 (1990)], revised June 1994 [to cover the rapid growth of PGI membership]; revised in April 2000 ; revised in May 2001; revised in November of 2008; and revised again in the spring of 2019 and shall remain an official document of the PGI until amended or discontinued. As NFPA codes are continually revised, NFPA-1123, NFPA-1126, and NFPA-160 in their current editions should serve to guide future revisions of these Safety Guidelines. 3. Scope: These Guidelines apply to the handling, storage, sale, discharge or other use of all kinds of fireworks and pyrotechnic or explosive devices during any official PGI convention. -
Pyrotechnic Serpents
Edited by Jack & Dorothy Drewes American Fireworks News THE BEST OF AFN III Edited by Jack & Dorothy Drewes Copyright ©1995 by Rex E. & S. P., Inc. Published by American Fireworks News HC67 - Box 30 Dingmans Ferry, PA 18328 All rights reserved. ISBN 0-929931-11-4 Printed in The United States of America 1st printing, April, 1995. 2nd printing, March, 1996 3rd printing, March, 1998 Warning: This publication contains descriptions and pictures of fireworks. The information contained herein is based on the authors' experiences using specific tools and ingredients under specific conditions not necessarily described in the articles. No warranties are made, given or implied. Readers are cautioned that they must form their own opinion as to the application of any information contained herein. 2 CONTENTS BASICS, SMALL DEVICES DISPLAY GOODS & OPERATIONS Getting a Pyro Education 7 The Basic Technician, #1, 2, 3 62 Fireworks and Me 8 Unexplained Explosion & Probability Lightning & Thunder Fountain 9 Theory 66 Construction Techniques of %" Roman Pyro Emitting Device 67 Candle Using Round Stars 10 Fireworks on a Budget 68 Bigger & Better Breaks with Small Ball Vis-A-Vis Fountains 70 Shells 11 Neon Blue & Recumbent Lances 71 Designing Portfires 12 Molecular Sieves as Cores 72 Fun with Jumping Jacks 14 Lance Development 73 Tischfeuerwerk 15 Illumination Breaks & Shimmering Bike Wheel Pyro 16 Curtains 73 Ground Bloom Flower Wheel 16 Pyro Surprises 74 Easy Sun 18 Push Sticks Aid Low Breaks 75 Class C Repeaters 19 Eight Experiments in Non-Commercial Exploding -
Innovation Infosheet Thermite Torch Composition
Innovation Infosheet Downloaded October 2, 2021 Thermite Torch Composition Track Code: CRANE-97179 Categories: - Chemistry and Chemical Analysis - NSWC Crane Keywords: - Chemistry and Chemical Analysis - Crane - Demolition - Law Enforcement - Military - Welding Naval Surface Warfare Center, Crane Division (NSWC Crane) has developed and patented a series of compositions for thermite pyrotechnics which offer enhanced material perforation, increased reaction temperatures, and decreased toxicity. Thermite is a pyrotechnic composition of a metal powder and a metal oxide. When ignited, thermite produces an exothermic reaction with extremely high temperatures. These compositions are composed of magnalium, copper oxide, molybdenum, and a binder material. These three patents represent the optimal combination of components to enhance material perforation, improved gas production, temperature stability, heat transfer, shelf life, and low toxicity. Advantages: - Enhanced material perforation - Improved gas production - Temperature stability - Heat transfer - Longer shelf life - Decreased toxicity Potential Applications: - Disaster Clean-up - Law Enforcement - Mining - Metal Cutting and Welding - Demolition Downloaded October 2, 2021 Page 1 / 2 People: - D'Arche, Steve (Project leader) - Melof, Brian - Swanson, Travis Intellectual Property: Application Date: (None) Type: CON-Patent Country of Filing: United States Patent Number: 7,998,291 Issue Date: August 16, 2011 Application Date: (None) Type: CON-Patent Country of Filing: United States Patent Number: 7,988,802 Issue Date: August 2, 2011 Application Date: (None) Type: Utility Patent Country of Filing: United States Patent Number: 7,632,365 Issue Date: December 15, 2009 Contact OTC: Purdue Office of Technology Commercialization The Convergence Center 101 Foundry Drive, Suite 2500 West Lafayette, IN 47906 Phone: (765) 588-3475 Fax: (765) 463-3486 Email: [email protected] Downloaded October 2, 2021 Page 2 / 2. -
CHAPTER 5 Department of Agriculture
CHAPTER 5 Department of Agriculture Statutory Authority: 1976 Code §§ 23-39-90, 39-9-70, 39-9-80, 39-9-160, 39-11-20, 39-21-40, 39-27-60, 39-29-80, 39-31-100, 39-33-1230, 39-37-120, 39-39-40, 39-39-160, 39-41-80, 39-41-150, 46-15-20, 46-15-30, 46-21-20, 46-23-50 and 46-27-60; Chapters 11 and 25 of Title 39; Chapters 17, 19 (Article 5), 23 and 41 of Title 46; and Chapter 11 (Article 5) of Title 47 ARTICLE 1 AGRICULTURAL COMMODITIES MARKETING ACT SUBARTICLE 1 SOYBEANS A. MARKETING ORDER NO. 1 FOR SOUTH CAROLINA SOYBEANS 5–1. Definition of Terms. Terms used in this Marketing Order shall be as defined in the Act with the following additions: a. ‘‘Act’’ means the South Carolina Agricultural Commodities Marketing Act of 1968 and as amended in 1970. b. ‘‘Affected area’’ and ‘‘production area’’ are synonymous and mean the entire area of South Carolina. c. ‘‘Board’’ means the South Carolina Soybean Board established pursuant to the provisions of § 46-17-190 and 5-2 of this Marketing Order. d. ‘‘Bushel,’’ ‘‘Unit,’’ and ‘‘Affected unit’’ are synonymous and mean and include one (1) standard U. S. bushel of 60 pounds by weight of soybeans. e. ‘‘Commission’’ means the Agriculture Commission of South Carolina. f. ‘‘District’’ means the geographical divisions of the area of soybean production established pursuant to the provisions of 5-2 of this Marketing Order. g. ‘‘First buyer’’ means the person to whom soybeans are sold by the affected producer of said soybeans.