Microstructure and mechanical performance of porous mullite ceramics added with TiO2

被引：25
|
作者：
Deng, Xiangong [1 ,2 ]
Zhang, Wanchun [2 ]
Yin, Jiaqiang [2 ]
Deng, Chaoheng [2 ]
Zhang, Shaowei [3 ]
Zhang, Haijun [3 ]
Ran, Songlin [1 ]
机构：
[1] Anhui Univ Technol, Minist Educ, Key Lab Met Emiss Reduct & Resources Recycling An, Maanshan 243002, Peoples R China
[2] Anhui Univ Technol, Sch Mat Sci & Engn, Key Lab Green Fabricat & Surface Technol Adv Met, Maanshan 243002, Peoples R China
[3] Wuhan Univ Sci & Technol, State Key Lab Refractories & Met, Wuhan 430081, Peoples R China
来源：
CERAMICS INTERNATIONAL | 2020年 / 46卷 / 06期
基金：
中国国家自然科学基金;
关键词：
Porous mullite ceramics; Columnar mullite; TiO2; additive; Mechanical performance; COAL FLY-ASH; HIGH-STRENGTH; FABRICATION; POROSITY; FOAMS;
D O I：
10.1016/j.ceramint.2019.12.078
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 mullite samples were manufactured using granular mullite powders as major materials, and TiO2 as the additive agent. Influences of TiO2 contents on rheological characteristics of slurries, and microstructure and bending strength at 25-1400 degrees C of final porous mullite products were investigated. Adding appropriate content of TiO2, a large amount of columnar mullite with mean length of 23.7 mu m and the length-to-diameter ratio of 6.7 was in-situ formed, which could improve the mechanical performance of the resultant porous samples. The bending strength at 25 degrees C of porous products containing 67% porosity fabricated by using 7 wt% TiO2 reached 12.5 MPa, and its bending strength at 1200 degrees C remained as high as 6.1 MPa.
引用
收藏
页码：8438 / 8443
页数：6
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