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《Journal of Changshu Institute of Technology》 2008-02
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A Study on Al_2TiO_5-Al_2O_3 Composite Ceramics

CHEN Jian-hua1,LU Hong-bin2,FENG Chun-xia2,LI Wen-dan3,SHAN Yue-yuan2 (1.Key Lab for New Functional Materials of Jiangsu,Changshu Institute of Technology,Changshu 215500,China 2.School of Material Engineering,Yancheng Institute of Technology,Yancheng 224003,China;3.College of Material Science and Engineering,Nanjing University of Technology,Nanjing 210009,China)  
Al2TiO5-Al2O3 composite ceramics were prepared by one step firing and two steps firing.The effects of sintering process and raw material composition of Al2TiO5-Al2O3 composite ceramics on the performances were studied.The results indicate that the composition and sintering process of the Al2TiO5-A12O3 composite ceramics have an important influence on the performances.The combination properties of the Al2TiO5-Al2O3 composite ceramics those prepared by one step firing are better than those prepared by two steps firing.When the composite ceramics with the composition of 80wt% alumina and 20wt% aluminium titanate are prepared by one step firing,the water absorptivity of the Al2TiO5-Al2O3 composite ceramics is only 0.11%,the open porosity is 0.32%,the bulk density is 3.00 g·cm-3,the bending strength reaches 152.88 MPa,and the thermal-expansion coefficient is 7.5×10-6/℃.
【Fund】: 江苏省自然科学基金(BK2002044)资助项目
【CateGory Index】: TQ174.1
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