Sintering,crystallization and dielectric properties of CaO-B_2O_3-SiO_2 system glass ceramics

作     者：戴斌 朱海奎 周洪庆 许贵军 岳振星 

作者机构：State Key Laboratory of Materials-Oriented Chemical Engineering(Nanjing University of Technology) College of Materials Science and EngineeringNanjing University of Technology State Key Laboratory of New Ceramic and Fine Processing(Tsinghua University) 

出 版 物：《Journal of Central South University》 (中南大学学报（英文版）)

年 卷 期：2012年第19卷第8期

页      面：2101-2106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] 

基　　金：Project(2007AA03Z0455) supported by the National High Technology Research and Development Program of China Project(BE2010194) supported by Science&Technology Pillar Program of Jiangsu Province, China Project(KF201103) supported by the State Key Laboratory of New Ceramic and Fine Processing, Tsinghua University, China Project supported by the Priority Academic Development of Jiangsu Higher Education Institutions, China 

主　　题：glass ceramics CaO-B2O3-SiO2 sintering dielectric properties microstructure 

摘      要：CaO-B203-SiO2 （CBS） glass powders are prepared by conventional glass melting method at different melting temperatures whose properties and microstructures are characterized by X-ray diffraction （XRD） and scanning electron microscopy （SEM）. It is found that there are SiO2 and some unknown phases in CBS glass melting liquid from 1 300 ℃ to 1 500 ℃ and the amount of these phases decreases with the increase of the melting temperature. The CBS glass melted at 1 450 ℃ could be sintered from 830 ℃ to 930 ℃ and the bulk densities of the samples are all higher than 2.4 g/cm^3. From the points of the properties and energy conservation, the melting temperature of 1 450 ℃ is the optimal melting temperature. The glass ceramic sintered at 850 ℃ exhibits better dielectric properties： er=6.33, tan6=2.2×10^-3 at 10 GHz, and the major phases of the samples are CaSiO3, CaB2O4 and SiO2.