Effect of different nucleating agent ratios on the crystallization and properties of MAS glass ceramics |
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| Affiliation: | 1. State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, 122 Luoshi Road, 430070 Wuhan, Hubei, PR China;2. Glass and Technology Research Institute of Shahe, 054100 Shahe, Hebei, PR China;3. The Center for Materials Research and Analysis, Wuhan University of Technology, 430070 Wuhan, Hubei, PR China;1. College of Material Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, PR China;2. Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin 541004, PR China;3. School of Mechanical and Electrical Engineering, Guilin University of Electronic Technology, Guilin 541004, PR China |
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| Abstract: | The effects of different kinds of nucleating agents on crystallization, microstructure and performances of Magnesium Aluminosilicate (MgO-Al2O3-SiO2, MAS) glass-ceramics which were fabricated by melting method in this study. Also, this paper systematically investigated the mechanism of glass stability, crystallization kinetics and element distribution of MAS glass-ceramics. Herein, we used three kinds of nucleating agents, which was TiO2, ZrO2 and composite nucleating agent (TiO2/ZrO2). The results showed after the doping of nucleating agent, the content of α-cordierite was increased, the stability and crystallization kinetics of glass was changed, the precipitated crystal phase was finer and more compact. Wherein, the sample with composite nucleating agents (TiO2, ZrO2) has the best performance due to the highest contents of α - cordierite, uniform distribution of elements without agglomeration in the crystal phase and the most compact structure, whose Vickers hardness and bending strength can reach 9.70 GPa and 312 MPa, respectively. |
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| Keywords: | Glass ceramics Magnesium aluminosilicate Crystallization kinetics Nucleating agent |
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