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《Ordnance Material Science and Engineering》 2008-03
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Effect of magnesia and silica additives on properties of aluminium titanate ceramic

LU Hong-bin1,CHEN Jian-hua2,FENG Chun-xia1,LI Wen-dan3,JIAO Bao-xiang1 (1. College of Material Engineering,Yancheng Institute of Technology,Yancheng 224003,China;2. Key Laboratory for New Functional Materials of Jiangsu Province,Changshu Institute of Technology,Changshu 215500,China;3. College of Material Science and Engineering,Nanjing University of Technology,Nanjing 210009,China)  
Effects and mechanisms of magnesia and silica additives on restraining thermal decomposition of aluminium titanate were studied by double-firing process. The results show that stability and flexural strength can be remarkably improved by adding composite additives of magnesia and silica. The flexural strength of the aluminium titanate prepared by adding 10 mol% magnesia and 15 mol% silica increases by 56% and the average thermal expansion coefficient is only 0.2×10-6/℃(RT~1 000 ℃). And when holding at 1 100 ℃ for 50 h, the aluminium titanate has no decomposition, even holding for 150 h, the decomposition ratio is only 9.5%.
【Fund】: 江苏省自然科学基金资助(资助号:BK2002044);; 江苏省生态环境材料重点实验室开放基金资助(资助号:XKY2006014)
【CateGory Index】: TQ174.1
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