The paper discussed that Silicon-nitride based porous ceramic was prepared by reaction-sintering and pressless-sintering with the powder of Si as raw material, Al2O3 and Y2O3 as sintering aids, carbon and carbamide as pore-forming agent.

• 本课题以Si粉为原料，以Al_2O_3、Y_2O_3、Al_2O_3+Y_2O_3等为烧结助剂，以C粉、尿素和碳酸氨为造孔剂，采用反应和常压烧结，同时结合造孔剂法制备氮化硅基多孔陶瓷。