Microwave dielectric properties of scheelite (A = Ca, Sr, Ba) and wolframite (A = Mg, Zn, Mn) AMoO4 compounds
Microwave dielectric properties of scheelite (A = Ca, Sr, Ba) and wolframite (A = Mg, Zn, Mn) AMoO4 compounds
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DOI：
10.1016/j.jeurceramsoc.2006.11.037
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发表时间：
2007
影响因子：
5.7
通讯作者：
Geun-Kyu Choi;Jeong-Ryeol Kim;S. Yoon;K. Hong
中科院分区：
文献类型：
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作者：
Geun-Kyu Choi;Jeong-Ryeol Kim;S. Yoon;K. Hong
用网络分析仪和X射线粉末衍射研究了白钨矿（A=Ca，Sr，Ba）和黑钨矿（A=Mg，Mn，Zn）AMoO_4化合物的微波介电性能及其与结构的关系。Mo离子的极化率也已从AMoO 4化合物使用最小二乘法结合Clausius-Mosotti方程的改进技术进行了研究。结果发现，介电性能，如介电常数，谐振频率的温度系数，和品质因数被发现与A-阳离子的大小和化合物的结构。烧结良好的样品（>理论密度的95%）的介电常数为7-11，品质因数为37，000 -90，000 GHz，谐振频率温度系数为−57-− 87 ppm/°C。研究结果表明，AMoO 4陶瓷具有较低的介电常数和较高的品质因数，可作为微波介质陶瓷的候选材料。
The microwave dielectric properties of scheelite (A=Ca, Sr, Ba) and wolframite (A=Mg, Mn, Zn) AMoO4compounds and their relations with structure have been examined using a network analyzer and X-ray powder diffraction. The Mo ion polarizability has been also investigated from AMoO4compounds using a least square refinement technique in conjunction with the Clausius–Mosotti equation. It was found that dielectric properties such as dielectric constant, temperature coefficient of resonant frequency, and quality factor were found to be correlated with the size of A-cations and the structure of compounds. The well sintered AMoO4samples (>95% of theoretical density) exhibited dielectric constant of 7–11, quality factor of 37,000–90,000GHz and temperature coefficient of resonant frequency of −57 to −87ppm/°C, respectively. These investigations showed that AMoO4ceramic could be selected as a possible candidate for microwave dielectric ceramics because of its low dielectric constant and high quality factor.