Porosity and microstructure control of porous ceramics by partial hot pressing
Porosity and microstructure control of porous ceramics by partial hot pressing
复制标题
DOI：
10.1557/jmr.2001.0262
复制
发表时间：
2001-07
影响因子：
2.7
通讯作者：
Jianfeng Yang;Guo‐Jun Zhang;T. Ohji
中科院分区：
文献类型：
--
作者：
Jianfeng Yang;Guo‐Jun Zhang;T. Ohji
多孔陶瓷的孔隙率和微观结构的精确控制至关重要。本文介绍了一种制备孔隙度为0.0 ~ 0.4的多孔陶瓷的方法。采用热压法制备了一定尺寸的粉末混合物，孔隙率随粉末量的变化而变化。例如，将Si_3N_4或SiC的粉末混合物与氧化物烧结添加剂混合制成多孔Si_3N_4或SiC陶瓷。结果表明，该方法有利于制备孔隙率和微观结构可控的陶瓷。
Precise control of porosity and microstructure of porous ceramics is essential. This paper describes a method for the preparation of porous ceramics with porosity from 0.0 to 0.4. The ceramics were prepared via hot pressing a powder mixture to a definite dimension, and the porosity was easily adjusted by the powder amount. As examples, porous Si_3N_4 or SiC ceramics were produced by powder mixtures that contained Si_3N_4 or SiC and a sintering additive of oxide. It was demonstrated that the present method is advantageous for producing ceramics with controllable porosity and microstructure.