Microwave Dielectric Properties of Li2WO4 Ceramic with Ultra‐Low Sintering Temperature
Microwave Dielectric Properties of Li2WO4 Ceramic with Ultra‐Low Sintering Temperature
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DOI：
10.1111/j.1551-2916.2010.04312.x
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发表时间：
2011-02
影响因子：
3.9
通讯作者：
Di Zhou;C. Randall;L. Pang;Hong Wang;Jing Guo;Gao-qun Zhang;Xinguang Wu;L. Shui;X. Yao
中科院分区：
文献类型：
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作者：
Di Zhou;C. Randall;L. Pang;Hong Wang;Jing Guo;Gao-qun Zhang;Xinguang Wu;L. Shui;X. Yao
采用固相反应法制备了一种新型超低温烧结非晶石结构微波介质陶瓷Li2WO4。Li2WO4陶瓷在640~660℃范围内烧成良好，微波相对介电常数∼为5.5，Q×f值约为62000 GHz，在15.7GHz处的负温度系数为−146ppm/°C。X射线衍射分析表明，Li2WO4陶瓷在640℃时与银粉和铝粉在化学上是相容的。这些结果表明，Li2WO4陶瓷是一种很有前途的超低温共烧陶瓷技术，特别是在介质衬底上的应用。
A new ultra-low-temperature firing microwave dielectric ceramic, Li2WO4 with the phenacite structure, was prepared via solid-state reaction method. The Li2WO4 ceramic can be well sintered at 640°–660°C, with a microwave relative permittivity ∼5.5, a Q×f value about 62 000 GHz, and a negative temperature coefficient of −146 ppm/°C at 15.7 GHz. From an X-ray diffraction analysis, the Li2WO4 ceramic was found to be chemically compatible with both silver and aluminum powders at 640°C. All the results indicate that the Li2WO4 ceramic is a promising candidate for ultra-low temperature cofired ceramic technology, especially for dielectric substrate application.