4 2
• 2Mg + Si = Mg2Si 单一的酸不能与 Si 反应,钝化,Si 可溶于 HF-HNO3 混酸中
3 Si + 18 HF + 4 HNO3 ——— 3 H2SiF6 + 4 NO↑+ 8 H2O Si 和强碱的作用类似于砷,比砷更容易些
Si + 2 NaOH + H2O ——— Na2SiO3 + 2 H2↑
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• (1) SiCl4 + 2Zn = Si + 2ZnCl2 • (2) SiO2和C混合,在电炉中加热:
SiO2 + 2C = Si + 2CO↑ • (3) SiO2 + CaC2 = Si + Ca + 2CO • (4) 硅烷的分解: SiH4 = Si + 2H2
the main component in silicon nitride ceramics, which have relatively good
shock resistance compared to other ceramics.
Rollers made of silicon nitride ceramic are sometimes used in high-end skateboard bearings, due to the material's shock and heat-resistant characteristics. It is also used as an ignition source for domestic gas appliances, hot surface ignition.