Effects of Crystal Structure on Microwave Dielectric Properties of Ceramics
Effects of Crystal Structure on Microwave Dielectric Properties of Ceramics
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DOI：
10.4191/kcers.2008.45.5.251
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发表时间：
2008-05
影响因子：
2.5
通讯作者：
E. Kim;C. Jeon;Sung Joo Kim;Su Jung Kim
中科院分区：
文献类型：
--
作者：
E. Kim;C. Jeon;Sung Joo Kim;Su Jung Kim
MgTiO₃、MgWO₄、MgNb₂O？MgTa₂O？对其结构特性进行了研究。样品的介电常数(K)与样品的介电极化率有关，随着mg位点键价的增加，介电极化率（α obs.）与理论介电极化率（α theo.）的偏差减小。质量因子（Qf）受MgO？和波?正八面体。谐振频率温度系数（TCF）随平均八面体畸变的增大而减小。
Microwave dielectric properties of MgTiO₃, MgWO₄, MgNb₂O?, and MgTa₂O? were investigated based on the structural characteristics. The dielectric constant (K) was dependent on the dielectric polarizabilities of the specimens, and the deviation of the observed dielectric polarizabilities (α obs. ) from the theoretical dielectric polarizabilities (α theo. ) were decreased with increasing of Mg-site bond valence. Quality factors (Qf) were affected by the sharing type of MgO? and BO? octahedra. Temperature coefficient of resonant frequency (TCF) was decreased with increasing of average octahedral distortion.