Journal of Inorganic Materials ›› 2022, Vol. 37 ›› Issue (12): 1351-1357.DOI: 10.15541/jim20220179

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Crystallization Kinetics, Properties of α-cordierite Based Glass-ceramics Prepared by Glass Powder Sintering

SUN Yangshan1,3(), YANG Zhihua2, CAI Delong2, ZHANG Zhengyi1,3, LIU Qi1,3, FANG Shuqing1,3, FENG Liang1,3, SHI Lifen1,3, WANG Youle1,3, JIA Dechang2   

  1. 1. State Key Laboratory of Advanced Technology for Float Glass, CNBM Research Institute for Advanced Glass Materials Group Co., Ltd, Bengbu 233000, China
    2. Key Laboratory of Advanced Structrual-Functional Integration Materials & Green Manufacturing Technology, Harbin Institute of Technology, Harbin 150001, China
    3. Silica-based Materials Laboratory of Anhui Province, Bengbu 233000, China
  • Received:2022-03-30 Revised:2022-05-25 Published:2022-12-20 Online:2022-06-03
  • About author:SUN Yangshan (1989-), male, senior engineer. E-mail:
  • Supported by:
    Anhui Provincial Natural Science Foundation (Youth Project)(2008085QE248);Key Research and Development Projects of Anhui Province(202004a05020061);Key Research and Development Projects of Anhui Province(202004a05020036);The 6th China Association for Science and Technology “Young Talent Support Project”


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 (ɛ as low as 3.5) with a low CTE of 4.22 × 10-6 K-1.

Key words: α-cordierite, glass-ceramics, powder sintering, crystallization kinetics, mechanical property, dielectric property

CLC Number: