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Preparation of Mullite Ceramics with Fly Ash and Clay by Pickling Process
Author(s) -
Li Ye,
Feng Junjie,
Wang Yonghong,
Cheng Xudong
Publication year - 2014
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.12258
Subject(s) - mullite , materials science , sintering , anorthite , corundum , metallurgy , pickling , ceramic , raw material , calcination , microstructure , phase (matter) , fly ash , lime , mineralogy , composite material , biochemistry , chemistry , organic chemistry , catalysis
Mullite ceramics were fabricated with fly ash, clay, and Al 2 O 3 as raw materials. The effects of Al 2 O 3 content, the sintering temperature and the pickling process on the crystalline phases, sintering characteristics and microstructures were studied. With more addition amount of Al 2 O 3 and higher sintering temperature, the peak intensity of the mullite crystalline phase increased. By pickling process, mullite instead of anorthite became the main phase with little corundum. Moreover, the required sintering temperature had reduced to 1300°C and the Al 2 O 3 content also decreased to 30 wt%. The pickling process also enlarged the sintering range of the green bodies.