无机材料学报2022，Vol.37Issue(12)：1351-1357,7.DOI:10.15541/jim20220179
粉末烧结法制备α-堇青石基玻璃陶瓷的析晶动力学和性能
Crystallization Kinetics, Properties of α-cordierite Based Glass-ceramics Prepared by Glass Powder Sintering
摘要
Abstract
The resulting glass-ceramics were prepared by glass powder sintering using stoichiometric and non-stoichiometric cordierite components with addition of B2O3. Properties of the glass-ceramics, including the non- isothermal crystallization kinetics, thermal, mechanical and dielectric properties were investigated. The α-cordierite based glass-ceramics can be easily prepared by using non-stoichiometric cordierite components, and B2O3 addition can promote the precipitation of α-cordierite and improve the crystallization ability of the MgO-Al2O3-SiO2 glass. Moreover, rich MgO and SiO2 in the glass composition did not affect the crystallization ability of the glass, but affect the type of precipitated crystal phase. The increase of B2O3 addition can prepare α-cordierite based glass-ceramics with a low coefficient of thermal expansion (CTE), but it also lower its softening point. In addition, the increase of B2O3 addition can also improve the compactness and mechanical strength of the glass-ceramics. The maximum flexural strength, elastic moduli, fracture toughness and bulk density of α-cordierite based glass-ceramics are (42.4±3.0) MPa, (34.0±2.9) GPa, (0.7±0.15) MPa·m1/2, and 1.53 g/cm3, respectively. And the as-prepared α- cordierite based glass-ceramics show good dielectric properties (? as low as 3.5) with a low CTE of 4.22 × 10–6 K–1.关键词
α-堇青石/玻璃陶瓷/粉末烧结/析晶动力学/力学性能/介电性能Key words
α-cordierite/glass-ceramics/powder sintering/crystallization kinetics/mechanical property/dielectric property分类
化学化工引用本文复制引用
孙扬善,贾德昌,杨治华,蔡德龙,张正义,柳琪,房树清,冯良,石丽芬,王友乐..粉末烧结法制备α-堇青石基玻璃陶瓷的析晶动力学和性能[J].无机材料学报,2022,37(12):1351-1357,7.基金项目
Foundation item:Anhui Provincial Natural Science Foundation(Youth Project)(2008085QE248) （Youth Project）
Key Research and Development Projects of Anhui Province(202004a05020061,202004a05020036) （202004a05020061,202004a05020036）
The 6th China Association for Science and Technology"Young Talent Support Project" （）
