Effect of TiO2 on crystallization and microwave dielectric properties of MgO-Al2O3-SiO2-TiO2-La2O3 glass-ceramics

被引：0

作者：

Wang, Huijuan ^{[1
]}

Li, Botao ^{[1
]}

Lin, Huixing ^{[1
]}

Chen, Wei ^{[1
]}

Luo, Lan ^{[1
]}

机构：

[1] Key Laboratory of Inorganic Function Material and Device, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai

来源：

Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society | 2015年 / 43卷 / 04期

关键词：

Crystallization; Glass-ceramic; Magnesium-aluminum-silicon-titanium lanthanide system glass; Microwave dielectric properties; Phase transition;

D O I：

10.14062/j.issn.0454-5648.2015.04.21

中图分类号：

学科分类号：

摘要：

Glass-ceramics were fabricated from MgO-Al2O3-SiO2-TiO2-La2O3 (MASTL) system by a molten method and subsequent one-step crystallization heat-treatment. The effect of TiO2 on the crystallization, microstructure and dielectric properties of the glass-ceramic material was investigated by differential scanning calorimetry, X-ray diffraction, scanning electron microscopy, energy dispersive X-ray spectroscopy and network analysis, respectively. The results show that the glass-ceramic consists of multi-crystalline phases, i.e., perrierite, cordierite, magnesium aluminotitanate (MAT), rutile and spinel (MgAl2O4). Among them, the content of MAT is low and spinel belongs to metastable intermediate. The crystallization tendency of the original glass becomes stronger when TiO2 content increases. Moreover, the crystallization temperature of perrierite and rutile descends significantly, while the crystallization temperature of spinel increases. The increase of dielectric constant and temperature coefficient of resonant frequency (τf) of the glass-ceramic is mainly due to the presence of more rutile with greatεr and tremendous positive τf, and the slight decrease of quality factor (Q×f) is correlated to the decrease of cordierite with great Q×f. ©, 2015, Chinese Ceramic Society. All right reserved.

引用

页码：498 / 503

页数：5

共 12 条

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