Cov tshuaj thiab lub cev qauv ntawm silicon nitride yog nyob ntawm qhov piv ntawm silicon rau nitrogen. Cov qauv siv lead ua ntawm qhov sib xyaw no feem ntau yog tetrahedral. Txhua lub atom nitrogen txuas nrog peb silicon atoms, yog li tsim kom muaj kev sib koom ua ke ntawm covalent bonds muaj zog. Cov txheej txheem microstructure tuaj yeem hloov kho los ntawm kev siv cov txheej txheem sib txawv ntawm cov txheej txheem sib xyaw ua ke, yog li yielding ntau yam morphologies, suav nrog granules, hmoov, thiab blocks. Txhua tus qauv tsim nyog rau kev lag luam tshwj xeeb.
Silicon nitride yog tus cwj pwm los ntawm qib siab ntawm hardness. Silicon nitride yog ib qho nyuaj tshaj li feem ntau ntawm cov hlau thiab ceramics, yog li conferring rau nws ib tug high degree ntawm tsis kam hnav.
- Tsom pom kev ruaj ntseg ntawm qhov kub siab: Silicon nitride muaj peev xwm tiv taus qhov kub thiab txias tshaj 1700 degree, ua rau nws cov khoom zoo rau kev siv kub.
- Resistant corrosion: Silicon nitride tiv taus rau feem ntau cov tshuaj, nrog rau cov kua qaub thiab alkalis.
- Insulates hluav taws xob: Txawm tias nws muaj peev xwm ua kom sov, silicon nitride yog ib qho zoo insulator. Qhov no ua rau nws yog qhov kev xaiv zoo tshaj plaws rau kev siv high-voltage.
- Thaum tshav kub kub conductivity: Nws muaj peev xwm ua kom sov ua rau nws muaj txiaj ntsig zoo hauv kev tswj xyuas thermal.
Silicon nitride tuaj yeem ua rau ntau txoj hauv kev, suav nrog cov hauv qab no:
- Los ntawm kev muab nws mus rau qhov kub siab kom txog thaum nws decomposes. Thaum kub siab, silicon reacts nrog ammonia los ua silicon nitride.
- Tshuaj vapor deposition (CVD): Cov tshuaj tiv thaiv ntawm silicon thiab ammonia tshwm sim hauv kev tsim cov yeeb yaj kiab nyias ntawm silicon nitride.
Cov tshuaj tiv thaiv sintering yog txheej txheem uas tsim cov khoom tiav los ntawm cov tshuaj tiv thaiv ntawm ob lossis ntau dua cov tshuaj. Ntawm qhov kub siab, cov tshuaj tiv thaiv ntawm silicon hmoov thiab ammonia tshwm sim hauv kev tsim cov qauv ntawm silicon nitride ntau.
