RO98546B1

RO98546B1 - Thermogene elements for starting primary thermal piles and process for obtaining the same

Info

Publication number: RO98546B1
Application number: RO129493A
Authority: RO
Inventors: Radu Chivu; Ioan Pana; Alexandru Milcoveanu; Aurelian Burmaz
Priority date: 1987-08-19
Filing date: 1987-08-19
Publication date: 1990-03-30

Abstract

Prezenta inventie se refera la elemente termogene pentru amorsarea bateriilor termice primare, care sunt sonstituite dintr-un amestec de 20...30% pulberi metalice de Mg, Al, Fe, Ni, Zr cu granulatia de 50...80 miu m, 60...70% cromat de bariu, 5...7% diatomita tehnica cu granulatia 60...70 miu m si împâslitura de fibre de azbest, care reprezinta 4...5% din greutatea amestecului, cantitatile fiind exprimate în procente în greutate. Procedeul conform inventiei, executa mai întâi obtinerea unei suspensii de amestec pirotehnic, prin omogenizarea a 80 parti în greutate cromat de bariu, pulbere metalica de Mg, Fe, Al, Ni, Zr, diatomita cu 80 parti în greutate apa timp de 2...3 h pâna la consistenta unei creme, peste care se introduce o suspensie de fulgi de azbest, care contine 2...3 parti în greutate substanta uscata, se completeaza cu apa pentru omogenizare perfecta, se filtreaza sub vid, dupa care percipitatul umed se lamineaza la grosimea corespunzatoare, ese usuca între doua platane, încalzite la 80 degree C si apoi în etuva la 100+/-5 degree C, timp de 3 h, si, în final, din foaia obtinuta se decupeaza prin stantare elemente de amestec termogen de dimensiuni impuse de structura bateriei electrice în care se utilizeaza.The present invention relates to thermogenic elements for priming primary thermal batteries, which are formed from a mixture of 20 ... 30% of Mg, Al, Fe, Ni, Zr metal powders with a granulation of 50 ... 80 mi. 60 ... 70% barium chromate, 5 ... 7% technical diatomite with a grain size of 60 ... 70 mi and moss of asbestos fiber, which represents 4 ... 5% of the weight of the mixture, the quantities being expressed in percent by weight. According to the invention, the first process involves the production of a pyrotechnic mixing slurry by homogenizing 80 parts by weight of barium chromate, Mg metal, Fe, Al, Ni, Zr, diatomite with 80 parts by weight water for 2 hours. .3 h to the consistency of a cream over which a slurry of asbestos flakes containing 2 to 3 parts by weight of the dry substance is added, filled with water for perfect homogenization, filtered under vacuum, then wet precipitation is laminated to the appropriate thickness, it is dried between two plates, heated to 80 ° C and then in the oven at 100 +/- 5 ° C, for 3 hours, and finally, the obtained sheet is cut out by punching mixing elements thermogenic dimensions imposed by the structure of the electrical battery in which it is used.