Journal of South China University of Technology (Natural Science Edition) ›› 2006, Vol. 34 ›› Issue (1): 101-104.

• Materials Science & Technology • Previous Articles     Next Articles

Strengthening and Toughening of Dental Porcelain Fused to M etal by Nano-Sized AI2O3

Yang Jin-ping1  Lü Ming1  Xin Chong-fei1  Peng Cheng2  Rao Ping-gen1  Wu Jian-qing1   

  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
  • Received:2005-03-14 Online:2006-01-25 Published:2006-01-25
  • Contact: 吴建青，教授，E-mail：imjqwu@scut．edu．en E-mail:imjp_yang@163.com
  • About author:杨金萍(1973-)，女，博士生，主要从事材料学方面的研究．
  • Supported by:

    国家“863”计划资助项目(2002AA302204 )；广东省科技计划资助项目(2001A1070102)

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Abstract:

Nano sized AI2O3powders 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 AI2O3in the sintered specimen．The effects of AI2O3content 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 AI2O3,and that adding 1. 5%(mass fraction)of nano-sized AI2O3 into the dental porcelain may remarkably enhance the strength and toughness when the sintering temperature is not higher than 900℃.

Key words: nano-sized AI2O3, dental porcelain fused to metal, mechanical propertv