Characterization and dielectric properties of Ba5LnNiTa9O30 (Ln = La, Nd and Sm) ceramics

被引：0
作者：
L. Fang
H. Zhang
T. H. Huang
F. C. Meng
J. F. Yang
机构：
[1] Wuhan University of Technology,State Key Lab. of Advanced Technology for Materials Synthesis and Processing
来源：
Journal of Electroceramics | 2006年 / 16卷
关键词：
Tungsten bronze structure; Dielectric properties; Ba; LnNiTa; O; X-ray diffraction;
D O I：
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学科分类号：
摘要：
Three novel Ba5LnNiTa9O30 (Ln = La, Nd and Sm) ceramics were prepared and characterized in the BaO-Ln2O3-NiO-Ta2O5 system. All three compounds adopted the filled tetragonal tungsten bronze (TB) structure at room temperature. The present ceramics exhibited relaxor behavior, and the Curie temperature (at 10kHz) were −130, −80 and −45°C for Ba5LaNiTa9O30, Ba5NdNiTa9O30, and Ba5SmNiTa9O30 respectively. At room temperature, Ba5LnNiTa9O30 ceramics have a high dielectric constants in the range 102∼118, a low dielectric loss in range 0.0019∼0.0036, and the temperature coefficients of the dielectric constant (τɛ) in the range −320∼−460 ppm°C−1 (at 1 MHz).
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页码：135 / 139
页数：4
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