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Method for improving low-temperature mechanical properties of composite solid propellant

A solid propellant and mechanics technology, applied in the production of compressed gas, attacking equipment, etc., can solve the problems of high test cost, increase low temperature mechanical properties, complex screening process, etc., to enhance physical adsorption force, improve low temperature mechanics performance, the effect of optimizing the loading structure

Active Publication Date: 2013-09-11
HUBEI SANJIANG AEROSPACE JIANGHE CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention provides a method for improving the low-temperature mechanical properties of a composite solid propellant, which is used to increase the improvement range of the low-temperature mechanical properties and solve the problems of complicated screening process, high test cost, compatibility and aging performance, etc.

Method used

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  • Method for improving low-temperature mechanical properties of composite solid propellant

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Effect test

Embodiment 1

[0013] The oxidant content in a certain composite solid propellant material formula is 70%, adding ultra-fine ammonium perchlorate, particle size d 4，3 The mass percentage of ultra-fine ammonium perchlorate in the composite solid propellant material formulation is 0.7 μm, and 69% is ammonium perchlorate of other specifications, and its low-temperature mechanical properties have increased by 21%.

Embodiment 2

[0015] The oxidant content in a certain composite solid propellant material formula is 70%, adding ultra-fine ammonium perchlorate, particle size d 4，3 The mass percentage of ultra-fine ammonium perchlorate in the composite solid propellant material formulation is 2.8 μm, and 62% is ammonium perchlorate of other specifications, and its low-temperature mechanical properties have increased by 19%.

Embodiment 3

[0017] The oxidant content in a certain composite solid propellant material formula is 70%, adding ultra-fine ammonium perchlorate, particle size d 4，3 The mass percentage of ultra-fine ammonium perchlorate in the composite solid propellant material formula is 4%, and 66% is ammonium perchlorate of other specifications, and its low-temperature mechanical properties have increased by 31.5%.

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Abstract

The invention discloses a method for improving low-temperature mechanical properties of a composite solid propellant, and belongs to the field of composite solid propellant manufacture. The method is characterized in that a composite solid propellant material formula adopts ultra-fine ammonium perchlorate to replace conventional ammonium perchlorate; a grain size (d4, 3) of the ultra-fine ammonium perchlorate is controlled in a range of 0.7 to 2.8 micrometers; and a mass percent of the ultra-fine ammonium perchlorate in the composite solid propellant material formula is in a range of 1 to 8%. The method can improve an increase range of low-temperature mechanical properties, and solve the problems of complex screening process, high testing cost, poor compatibility, easy aging and the like.

Description

technical field [0001] The invention belongs to the field of composite solid propellant manufacture, and in particular relates to a method for improving the low-temperature mechanical properties of composite solid propellant. Background technique [0002] Composite solid propellant material is composed of binder system, plasticizer, metal powder (such as aluminum powder, magnesium powder, etc.), oxidizer powder (such as ammonium perchlorate, potassium perchlorate, etc.), catalyst and related additives Solid energetic materials with high solid content. At present, ammonium perchlorate is mainly used as the oxidant. Conventional ammonium perchlorate can be divided into four specifications according to its particle size: 40-60 mesh, 60-80 mesh, 100-140 mesh, and 4-8 μm. Use the above two or three specifications at the same time. Since the solid content of the formula usually reaches more than 87% (mass percentage), the mechanical properties of the material decrease, especiall...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C06D5/06
Inventor 何宜丰崔瑞禧牛草坪杨香萍段军鸿宋怀兵
Owner HUBEI SANJIANG AEROSPACE JIANGHE CHEM TECH
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