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《Journal of South China University of Technology(Natural Science Edition)》 2006-01
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Strengthening and Toughening of Dental Porcelain Fused to Metal by Nano-Sized Al_2O_3

Yang Jin-ping~1 Lü Ming~1 Xin Chong-fei~1 Peng Cheng~2 Rao Ping-gen~1 Wu Jian-qing~1(1.Key Laboratory of Specially Functional Materials and Advanced Manufacturing Tech.,the Ministry of Education,South China Univ.of Tech.,Guangzhou 510640,Guangdong,China;2.Shanghai Institute of Ceramics,the Chinese Academy of Sciences,Shanghai 200050,China)  
Nano-sized Al_2O_3 powders were used as dispersed particles to improve the toughness and strength of low-temperature dental porcelain fused to metal,and XRD was used to determine the phase composition of nano-sized Al_2O_3 in the sintered specimen.The effects of Al_2O_3 content on the strength,hardness and toughness of the sintered specimen were also investigated.Results show that the bending strength,hardness and toughness increase with the content of nano-sized Al_2O_3,and that adding 1.5%(mass fraction) of nano-sized Al_2O_3 into the dental porcelain may remarkably enhance the strength and toughness when the sintering temperature is not higher than 900℃.
【Fund】: 国家“863”计划资助项目(2002AA302204);; 广东省科技计划资助项目(2001A1070102)
【CateGory Index】: TQ174.15
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