Dielectric properties of lanthanum substituted barium titanate microwave ceramics
Dielectric properties of lanthanum substituted barium titanate microwave ceramics
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DOI：
10.1016/j.matlet.2006.02.079
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发表时间：
2006-11
影响因子：
3
通讯作者：
S. B. Narang;Dalveer Kaur;S. Bahel
中科院分区：
文献类型：
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作者：
S. B. Narang;Dalveer Kaur;S. Bahel
在这项研究中，我们报告了高介电常数镧取代钛酸钡陶瓷材料在微波频率下的可能应用。对传统混合氧化物路线法制备的0.0≤x≤0.7的Ba6−3xLa8+2xTi18O54固溶体进行了微波介电表征。晶格参数由X射线衍射图获得。据观察，晶格参数随着“La”含量的增加而增加。研究的晶体对称性为斜方晶系，空间群为Pbam。通过对掺镧钛酸钡陶瓷的微波介电性能的评估，观察到介电常数的最大值(ε')＝157和最小正切损耗(tanδ)＝0.0572。交流的最小值观察到电导率 (σa.c.) 为 1.76e−07 S/m。
In this study, we report the high dielectric constant lanthanum substituted barium titanate ceramic material for its possible applications at microwave frequencies. The microwave dielectric characterization of Ba6−3xLa8+2xTi18O54solid solutions with 0.0≤x≤0.7 prepared by conventional mixed oxide route method has been carried out. The lattice parameters were obtained from the X-ray diffraction patterns. It was observed that lattice parameters increased with respect to an increase in the ‘La’ content. The crystal symmetry investigated was orthorhombic with space group of Pbam. From the evaluation of microwave dielectric properties of lanthanum doped barium titanate ceramics, it was observed that a maximum value of dielectric constant (ε′)=157 and a minimum tangent loss (tanδ)=0.0572 was obtained. The minimum value of a.c. conductivity (σa.c.) was observed to be 1.76e−07 S/m.