Mineral-phase evolution and sintering behavior of MO-SiO2-Al2O3-B2O3 (M=Ca,Ba) glass-ceramics by low-temperature liquid-phase sintering |
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作者姓名: | Song Chen Zhen Sun De-gui Zhu |
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作者单位: | School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China |
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摘 要: | In this work, network former SiO2 and network intermediate Al2O3 were introduced into typical low-melting binary compositions CaO·B2O3, CaO·2B2O3, and BaO·B2O3 via an aqueous solid-state suspension milling route. Accordingly, multiple-phase aluminosilicate glass-ceramics were directly obtained via liquid-phase sintering at temperatures below 950℃. On the basis of liquid-phase sintering theory, mineral-phase evolutions and glass-phase formations were systematically investigated in a wide MO-SiO2-Al2O3-B2O3 (M=Ca, Ba) composition range. The results indicate that major mineral phases of the aluminosilicate glass-ceramics are Al20B4O36, CaAl2Si2O8, and BaAl2Si2O8 and that the glass-ceramic materials are characterized by dense microstructures and excellent dielectric properties.
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关 键 词: | glass-ceramics liquid-phase sintering aluminosilicate mineral phase microstructures |
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