Effect of Cristobalite and Quartz on the Properties of Gypsum Bonded Investment

作     者：Yun-Jong Kim Sang-Bae Kim Hyun-Hye Park Myeong-Deok Seo Byoung-Cheon Lee Man-So Han Taik-Nam Kim Sung-Baek Cho 

作者机构：Korea Institute of Geoscience and Mineral Resources (KIGAM) Gajeong-dong 30Yuseong-kuDaejeon 305-350Korea Department of Materials Engineering Graduate SchoolPaichai UniversityDaejeon 302-735Korea Dept.of Dental Laboratory Technology Daejeon Health Science CollegeKorea 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2008年第24卷第1期

页      面：143-144页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

主　　题：Investment Cristobalite Quartz Thermal expansion coefficient Compressivestrength 

摘      要：Generally the gold investment material consists of cristobalite,quartz and *** physical property of gold investment materials depends on its thermal expansion coefficients,compressive strength,and particles size *** the thermal expansion coefficient of cristobalite and quartz are 2.6×10^-6/℃and 2.32×10^-6/℃respectively,the composition ratio of each components influence the thermal and physical properties of gold investment *** the clinical applications,it is necessary to improve the properties of gold investment materials such as homogeneous size distribution and thermal expansion *** the present study,effect of inorganic fillers such as cristobalite and quartz on gold alloy investment was investigated to improve the properties of *** compressive strength and thermal expansion coefficients of the specimens were *** results showed that cristobalite and quartz were homogeneously distributed by milling. The optimum compressive strength was obtained at the ratio of 42：22 cristobalite and quartz,respectively.