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Title: Solutions for resistance-after-fire problems in an electric match

Abstract

Current leakage in an electric match after firing is a problem if it drains power that can be used elsewhere or if it induces unwanted fluctuations in other electrical circuits. Two novel techniques are described that significantly reduce the RAF sensitivity of a Ti/KClO/sub 4/-loaded electric match used to ignite the pyrotechnic materials in a thermal battery. In the first technique, a thin (less than 10 ..mu..m thick) film insulator, such as Parylene or SiO/sub 2/, is vapor deposited within the match cavity prior to the loading of the pyrotechnic. The insulator tends to smooth the cavity surface as an aid to ejection of firing residues and to decrease the exposed metal surface area to prevent pin-to-pin short circuits. The second technique involves placing a length of heat-shrinkable tubing on the match extending from the output end so that the shrink tubing is activated by the heat of the match and the thermal battery when fired. The shrinkage of the tubing effectively decreases the cross-sectional area for mass and heat transfer from the battery back into the match. 5 figures, 2 tables.

Authors:
;
Publication Date:
Research Org.:
Sandia National Labs., Albuquerque, NM (USA)
OSTI Identifier:
5284166
Report Number(s):
SAND-80-0269C; CONF-800713-13
DOE Contract Number:  
AC04-76DP00789
Resource Type:
Conference
Resource Relation:
Conference: 7. international pyrotechnics seminar, Vail, CO, USA, 14 Jul 1980
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; THERMAL BATTERIES; IGNITION; PYROTECHNIC DEVICES; ELECTRIC CONDUCTIVITY; EXPERIMENTAL DATA; THERMAL CONDUCTIVITY; DATA; ELECTRIC BATTERIES; ELECTRICAL PROPERTIES; ELECTROCHEMICAL CELLS; ENERGY STORAGE SYSTEMS; INFORMATION; NUMERICAL DATA; PHYSICAL PROPERTIES; THERMODYNAMIC PROPERTIES; 250903* - Energy Storage- Batteries- Materials, Components, & Auxiliaries

Citation Formats

Heckes, A. A., and Montoya, A. P. Solutions for resistance-after-fire problems in an electric match. United States: N. p., 1980. Web.
Heckes, A. A., & Montoya, A. P. Solutions for resistance-after-fire problems in an electric match. United States.
Heckes, A. A., and Montoya, A. P. Tue . "Solutions for resistance-after-fire problems in an electric match". United States. https://www.osti.gov/servlets/purl/5284166.
@article{osti_5284166,
title = {Solutions for resistance-after-fire problems in an electric match},
author = {Heckes, A. A. and Montoya, A. P.},
abstractNote = {Current leakage in an electric match after firing is a problem if it drains power that can be used elsewhere or if it induces unwanted fluctuations in other electrical circuits. Two novel techniques are described that significantly reduce the RAF sensitivity of a Ti/KClO/sub 4/-loaded electric match used to ignite the pyrotechnic materials in a thermal battery. In the first technique, a thin (less than 10 ..mu..m thick) film insulator, such as Parylene or SiO/sub 2/, is vapor deposited within the match cavity prior to the loading of the pyrotechnic. The insulator tends to smooth the cavity surface as an aid to ejection of firing residues and to decrease the exposed metal surface area to prevent pin-to-pin short circuits. The second technique involves placing a length of heat-shrinkable tubing on the match extending from the output end so that the shrink tubing is activated by the heat of the match and the thermal battery when fired. The shrinkage of the tubing effectively decreases the cross-sectional area for mass and heat transfer from the battery back into the match. 5 figures, 2 tables.},
doi = {},
url = {https://www.osti.gov/biblio/5284166}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1980},
month = {1}
}

Conference:
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