摘要
β-Si Al ON reticular porous ceramics(Si_(6-Z)Al_(Z)O_(Z)N_(8-Z),Z=2)were prepared withα-Al_(2)O_(3),AlN and Si as raw materials and Y_(2)O_(3)as the sintering aid by the foam impregnation method.The influence of the Y_(2)O_(3)addition(0,3%,6%and 9%,by mass)on the microstructure and the properties of the samples was studied.The results show that the Y_(2)O_(3)addition is conductive to the sintering of samples and the growth of grains.The sample added with 6%Y_(2)O_(3)has the optimal properties:the apparent porosity of 82.9%,the bulk density of 0.53 g·cm^(-3),the cold compressive strength of 1.97 MPa,and the residual cold compressive strength of 1.68 MPa after oxidation,which can be used as porous ceramic filters.
