Fabrication, microstructural characterization and gas permeability behavior of porous silicon nitride ceramics with controllable pore structures

被引：48
作者：
Li, Xueqing [1 ,2 ]
Yao, Dongxu [1 ]
Zuo, Kaihui [1 ]
Xia, Yongfeng [1 ]
Yin, Jinwei [1 ]
Liang, Hanqin [1 ]
Zeng, Yu-Ping [1 ]
机构：
[1] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China
[2] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China
来源：
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2019年 / 39卷 / 09期
基金：
国家重点研发计划;
关键词：
Porous silicon nitride ceramics; Pore structure; Gas permeability; Cold isostatic pressing; Freeze-casting; SI3N4; CERAMICS; PERMEATION PERFORMANCE; DIELECTRIC-PROPERTIES; HIGH-STRENGTH; POROSITY; FILTERS;
D O I：
10.1016/j.jeurceramsoc.2019.03.011
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Porous Si3N4 ceramics with monomodal and bimodal pore structure were prepared by cold isostatic pressing and freeze-casting, respectively. Both the pore structure and permeability behavior of the porous Si3N4 ceramics were tailored by altering the pressure of cold isostatic pressing and the composition and content of solvent during freeze-casting. The specimens obtained by cold isostatic pressing exhibited smaller Darcian and non-Darcian permeability than those of freeze-casted samples due to their lower open porosity, smaller pore size and higher tortuosity. On the other hand, compared with the ice-templated specimens having the same solvent volume in the ceramic slurries as them during freeze-casting, the emulsion-ice templated samples showed smaller open porosity, macropore size and Dacian permeability, but the similar non-Darcian permeability because of their larger micropores and better pore interconnectivity.
引用
收藏
页码：2855 / 2861
页数：7
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