以碳化硅、硅粉为原料,添加不同烧结助剂,采用常压烧结法,制备氮化硅结合碳化硅陶瓷支撑体.研究不同烧结助剂(氧化铝、氧化钇、氧化铝和氧化钇)对氮化硅结合碳化硅陶瓷支撑体性能的影响.结果表明:样品孔隙率、纯水通量和孔径分布按Al2O3、Y2O3、Al2O3和Y2O3的顺序逐渐减小,抗折强度则逐渐增大.添加量为6%时,Al2O3为烧结助剂时具有最大的孔隙率和纯水通量,分别为5.1 m3/(m2·h),40.9%;添加Al2O3和Y2O3时有最高的抗折强度20.12 MPa,最窄的孔径分布0.4-1.2 μm.%As the raw materials, the silicon carbide and silicon, which added various sintering agents, were using to prepare the ceramics of silicon nitride combined silicon carbide (ceramic support) by atmospheric pressure sintering process. The impact of different sintering additives (Al2O3、Y2O3、Al2O3and Y2O3) on silicon nitride combined with silicon carbide ceramic support performance has been researched. Result shows the porosity, the pure water flux and pore size distribution of ceramic supports with Al2O3are the maximum values, while these values in ceramic support with Y2O3or Al2O3mixed Y2O3are relatively lower, among which the latter is the smaller value, whilst the bending strength of ceramic supports present opposite tendency. The ceramic support with Al2O3appears the greatest porosity and pure water flux at the addictive amount of 6 wt.%, which is 5.1 m3/ (m2·h) and 40.9% respectively, however the bending strength of ceramic support with Al2O3 mixed Y2O3is maximal, at 20.12 MPa, also the porosity of ceramic support with Al2O3mixed Y2O3is narrowest, at the range from 0.4 to 1.2 μm.
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