Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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

A solid propellant and mechanical technology, applied in the direction of compressed gas generation, attack equipment, etc., can solve the problems of high test costs, increase low-temperature mechanical properties, and complicated screening process, so as to enhance physical adsorption force and improve low-temperature mechanical properties. Performance, the effect of optimizing the filling structure

Active Publication Date: 2012-01-18
HUBEI SANJIANG AEROSPACE JIANGHE CHEM TECH
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for improving low-temperature mechanical properties of composite solid propellant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] The oxidant content in the formula of a composite solid propellant material is 70%, adding ultrafine ammonium perchlorate, the particle size is d 4，3 It is 0.7μm, the mass percentage of ultra-fine ammonium perchlorate in the composite solid propellant material formula is 1%, and 69% is ammonium perchlorate of other specifications, and its low-temperature mechanical properties are improved by 21%.

Embodiment 2

[0015] The oxidant content in the formula of a composite solid propellant material is 70%, adding ultrafine ammonium perchlorate, the particle size is d 4，3 It is 2.8μm, the mass percentage of ultra-fine ammonium perchlorate in the composite solid propellant material formula is 8%, and 62% is ammonium perchlorate of other specifications, and its low-temperature mechanical properties are improved by 19%.

Embodiment 3

[0017] The oxidant content in the formula of a composite solid propellant material is 70%, adding ultrafine ammonium perchlorate, the particle size is d 4，3 It is 1.3 μm, 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 are improved by 31.5%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

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 manufacturing, in particular to a method for improving the low-temperature mechanical properties of the composite solid propellant. Background technique [0002] The composite solid propellant material is composed of binder system, plasticizer, metal micropowder (such as aluminum powder, magnesium powder, etc.), oxidant micropowder (such as ammonium perchlorate, potassium perchlorate, etc.), catalyst and related additives. Solid energetic materials with high solids content. At present, the oxidant mainly uses ammonium perchlorate. 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 two or three of the above specifications at the same time. Since the solid content of the formula usually reaches more than 87% (mass percent), the mechanical properties of the material decrease, especi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com