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A kind of composite gas generating agent with Maisa combustion effect and its preparation method

A gas generating agent and combustion effect technology, which is applied in the generation of compressed gas, attack equipment, explosives, etc., can solve the problems of high combustion temperature, poor thermal stability, high burning rate and pressure index, and achieve good application prospects and stable thrust performance , The effect of chemical combustion stability

Active Publication Date: 2020-08-28
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The NaN3 / oxidant system was the first gas generating agent formula to be used, but due to the strong toxicity of the components, there were great safety hazards, and it was gradually replaced by the ammonium nitrate / oxidant system
However, the ammonium nitrate / oxidant system generally has the problems of poor thermal stability and high sensitivity.
Therefore, the azole / oxidant system with high nitrogen content, strong thermal stability, and insensitivity has been more and more researched. The main problems of this system are that the combustion temperature is too high and the burning rate pressure index is too high.

Method used

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  • A kind of composite gas generating agent with Maisa combustion effect and its preparation method

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preparation example Construction

[0036]

[0037] (1) 17.1 grams of 5-aminotetrazole and 18.02 grams of guanidine carbonate were placed in an incubator at 80°C for drying for 8 hours; (2) after drying, 5-aminotetrazole was added to 500ml of ethanol solution and stirred slowly Slowly add guanidine carbonate simultaneously; (3) place on the constant temperature magnetic stirrer after putting into magnetic stirrer, temperature is set to 50 ℃, and rotating speed is set to 500rpm, and stirring time is set to 12 hours; (4) stops after stirring After 3 hours, the product with reaction gas escapes completely, and the reaction solution is added to a suction filtration device for suction filtration; (5) collect the solid matter obtained after suction filtration, and place it in a constant temperature drying oven at 80° C. for drying for 24 hours to obtain Pentaaminotetrazolium guanidine salt.

Embodiment 1

[0039] A composite gas generating agent, based on the mass of the gas generating agent as 100%, its composition and mass fraction are 24.9% of 5-aminotetrazole, 20.1% of strontium nitrate, 2% of copper oxide, and 1% of zinc oxide %, calcium carbonate 30%, magnesium carbonate 20%, epoxy resin 2%;

[0040] A kind of preparation method of above-mentioned composite type gas generant composition is as follows:

[0041] (1) 5-aminotetrazole and strontium nitrate were ball milled in a ball mill at 100rpm for 1.5 hours respectively, and repeatedly passed through a 200 mesh sieve for 2 times to obtain 5-aminotetrazole and strontium nitrate with a particle diameter≤75 μm; (2) Place calcium carbonate and magnesium carbonate in an incubator at 80°C to dry for 12 hours, repeat passing through a 200-mesh sieve 4 times to obtain calcium carbonate and magnesium carbonate with a particle size of ≤75 μm; (3) mix 24.9g of 5-aminotetrazole, 20.1g of strontium nitrate, 30g of calcium carbonate an...

Embodiment 2

[0043] A composite gas generating agent, based on the mass of the gas generating agent as 100%, its composition and mass fraction are 25.8% of 5-aminotetrazole, 21.5% of nitroguanidine, 26.7% of strontium nitrate, copper oxide 2%, zinc oxide 2%, calcium carbonate 20%, epoxy resin 2%;

[0044](1) 5-aminotetrazole, nitroguanidine and strontium nitrate were ball milled in a ball mill at 100rpm for 1.5 hours respectively, and passed through a 200 mesh sieve twice to obtain 5-aminotetrazole and nitroguanidine with a particle size≤75 μm. Guanidine and strontium nitrate; (2) place calcium carbonate in an incubator at 80°C to dry for 12 hours, repeat passing through a 200-mesh sieve 4 times to obtain calcium carbonate with a particle size of ≤75 μm; (3) mix 25.8g of 5-aminotetrazole , 21.5g nitroguanidine, 26.7g strontium nitrate and 20g calcium carbonate were mixed, after adding 2g copper oxide, 2g zinc oxide, ball milled again in the ball mill of 100rpm for 0.5 hour to obtain a unif...

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Abstract

The invention relates to a composite gas generating agent with a mesa combustion effect and a preparation method thereof. The gas generating agent can generate or obtain a gas product suitable for being used as a pushing source during the combustion, and is suitable for being applied to the field of a fire extinguishing device. The composite gas generating agent is prepared from the ingredients of5-amino-1h-tetrazol, nitroguanidine, aminotetrazolidine salt, copper oxide, zinc oxide, oxidizing agents, cooling agents and bonding agents, wherein the oxidizing agents include strontium nitrate andpotassium nitrate; the cooling agents include calcium carbonate and magnesium carbonate. The method is characterized in that the 5-amino-1h-tetrazol, the nitroguanidine, the aminotetrazolidine salt,the copper oxide, the zinc oxide, the oxidizing agents and the cooling agents are uniformly mixed; then, ethyl alcohol is added for dissolution; the mixture is charged into a planetary ball milling instrument; full grinding is performed for 12h; after the drying crushing, the mixture passes through a 100-mesh sieve; uniformly mixed powder is obtained; the corresponding proportion of bonding agentsare added into the power; the mixture is uniformly mixed and is then charged into a mold; an automatic punching machine is used for completing the tableting at the specified pressure; the gas generating agent is obtained.

Description

technical field [0001] The invention belongs to the technical field of gas generating agents, and in particular relates to a composite gas generating agent with Maisa combustion effect and a preparation method thereof. Background technique [0002] A pyrotechnic gas generating agent is a pyrotechnic agent that can generate a large amount of gas in a rapid chemical reaction (combustion), referred to as a gas generating agent. In recent years, due to its fast and efficient gas production characteristics, gas generating agents have been more and more used in fire extinguishing devices to replace pressurized nitrogen as a power source. [0003] The NaN3 / oxidant system was the first gas generating agent formula to be used, but due to the strong toxicity of the components, there were great safety hazards, and it was gradually replaced by the ammonium nitrate / oxidant system. However, the ammonium nitrate / oxidant system generally has the problems of poor thermal stability and high ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C06D5/06C06B31/12
CPCC06B31/12C06D5/06
Inventor 张和平曹承阳陆松张丹
Owner UNIV OF SCI & TECH OF CHINA
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