New perovskite-related oxides having high dielectric constant: Ln2Ba2CaZn2Ti3O14 (Ln = La and Pr)

被引：16
作者：
Pika Jha
Ashok K. Ganguli
机构：
[1] Indian Institute of Technology,Department of Chemistry
来源：
Journal of Chemical Sciences | 2003年 / 115卷 / 5-6期
关键词：
Perovskite structure; oxides; dielectric material;
D O I：
10.1007/BF02708234
中图分类号：
学科分类号：
摘要：
Two new oxides, La2Ba2CaZn2Ti3O14 and Pr2Ba2CaZn2Ti3O14, have been synthesized by the ceramic route at 1100°C. These oxides crystallize in the disordered cubic structure with an ‘a’ lattice parameter of 3.9728 (2) and 3.9448 (5) respectively. These oxides show high dielectric constant (70 and 57) and low loss (0.003 and 0.013 at 100 kHz) for La2Ba2CaZn2Ti3O14 and Pr2Ba2CaZn2Ti3O14 respectively. The dielectric constant is highly stable with frequency and temperature.
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页码：431 / 438
页数：7
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