Preparation of porous Al₂TiO₅-Mullite ceramic by starch consolidation casting and its corrosion resistance characterization

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• 作者：Guogang Xu ; ^{xgg_79@163.com" class="auth_mail" title="E-mail the corresponding author} ; ^{xgg_79@sdust.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Zhiwei Chen ; Xueying Zhang ; Hongzhi Cui ; Zhihui Zhang ; Xiaoyuan Zhan
• 关键词：Porous ceramic ; Mechanical properties ; Microstructure ; Chemical stability
• 刊名：Ceramics International
• 出版年：2016
• 出版时间：September 2016
• 年：2016
• 卷：42
• 期：12
• 页码：14107-14112
• 全文大小：2610 K

文摘

Stabilized Al₂TiO₅ (AT)-mullite (M) porous ceramics were fabricated by starch consolidation casting using corn starch as curing agent and their microstructure, mechanical properties, pore size distribution and corrosion resistance were examined. Results showed that AT-M porous ceramic with the flexural strength of 11.5 MPa, apparent porosity of about 54.7% and pore size distribution in the range of 1–15 µm could be obtained with 10 wt% corn starch addition. Corrosion resistance results showed mass losses in hot H₂SO₄ solution and NaOH solution for 10 h to decreased from 1.03% to 0.36% and 4.39–2% when the calcination temperature increased from 1400 °C to 1450 °C, which proved these AT-M porous ceramics to possess an excellent corrosion resistance in acidic condition when calcined at 1450 °C.