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美国Dow Corning公司研究了1种新型的氮化硅陶瓷纤维X9-6371HPZ,其高温力学性能比其它陶瓷纤维高,例如,它的室温拉伸强度为250～280kSi,而其它陶瓷纤维如Tyranno TRN-M-1601(日本)为9kSi、Nicalon(日本)为125～205kSi、Nextel 480(美国)为125kSi,在1000℃的大气中加热100小时后,其强度仍保持室温拉伸强度的85％左右。在1400℃的氩气中加热2小时后,其拉伸强度为215kSi,而Nextel 480为180kSi、Nicalon和Tyranno TRN-M-1601为60～65kSi。
Dow Corning US company studied a new type of silicon nitride ceramic fiber X9-6371HPZ high temperature mechanical properties higher than other ceramic fibers, for example, its tensile strength at room temperature 250 ~ 280kSi, and other ceramic fibers such as Tyranno TRN- M-1601 (Japan) is 9kSi, Nicalon (Japan) is 125 to 205kSi and Nextel 480 (USA) is 125kSi. After heating at 1000 ° C for 100 hours in the atmosphere, the strength remains about 85% of the room temperature tensile strength. Tensile strength was 215 kSi after heating in argon at 1400 ° C for 2 hours whereas Nextel 480 was 180 ksi and Nicalon and Tyranno TRN-M-1601 were 60-65 kSi.