Graphite material has the characteristics of light weight, high temperature resistance and ablation resistance. It is the preferred material for the solid rocket motor (SRM) of small rocket, graphite nozzle. As early as 1947, the United States launched solid rocketsonde successfully using graphite throat liner, after gradually developed with ATJ as the representative of the first generation of high strength graphite throat liner material with high density and high strength graphite, G90 as the representative of the second generation of throat liner materials 1 - 2, with Graphnol of isotropic graphite as the representative of the third generation of throat liner material 3. At the beginning of 1960s, the research and development of SRM throat liner material with graphite and refractory metals was proposed. By the Chinese Academy of Sciences. T705 is now popular.
A, Jilin carbon factory, Xi'an Aerospace Composite Materials Institute developed the first generation of silicon zed KS8 high strength graphite throat liner. KS8 C17 8 graphite is imitation of the former Soviet Union, and in Jilin carbon factory batch production, to solve the problem for crack development process of silicon zed layer thickness and the heat generated by the. With four of the space science and technology based on SRM by steering model development and lay a solid foundation of throat liner material, has been successfully applied to the first artificial earth satellite in China -- the final SRM dong-fang-hong I on.
For the development of solid propellant can adapt to the demand, improve the ablation performance, resistance of graphite throat liner in mid 1960s by the Chinese Academy of Sciences, Shanxi Institute of coal chemistry, Harbin Institute of electrical carbon, Xi'an aerospace composite materials developed the second generation of high density and high strength graphite T704. At the beginning of 80s, the T705 graphite was developed by Harbin electric carbon and Xi'an aerospace composite materials, all of which were produced in Harbin electric carbon factory. The grain size in graphite by using ingredients, sulfur modified coal tar pitch binder, hot molding process and constraint roasting technology innovation, greatly improve the graphite material yield and erosion resistance, has been successfully applied to a variety of small tactical missile SRM throat in 4 - 6. The Jinji group by Ordnance Group Corporation Harbin electric carbon factory developed cold molded T707 and T715 graphite, Xingtai electric carbon factory developed cold molded T711 graphite, as a small rocket SRM throat materials, also belongs to the second generation of throat liner material. Chengdu carbon limited development of isostatic pressing isotropic
CDK20 graphite, as the third generation of the small rocket SRM throat lining material, is working with the aerospace technology group, the seven Institute of applied research.