The nitrogen silicon base pottery has high density,low proportion,high strog,high hard,high toughness,wear-resisting to decrease,corrosion-resistant,anti-oxidant,resistant heat shake,low expand,lubricate,insulate against heat,electricity insulating and so on,such as a series of fine performance being by oneself.It have extensive application prospects in such fields as the aviation,spaceflight,electron,metallurgy,machinery,petroleum,chemical industry,energy,traffic,electric apparatus,etc..