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

Journal of Chemical Sciences

Ashok K Ganguli1¹  Pika Jha¹ 

[1] Department of Chemistry, Indian Institute of Technology, Hauz Khas, New Delhi 110 016, India$$

关键词: Perovskite structure;    oxides;    dielectric material.;   

DOI  :  

来源: Indian Academy of Sciences

【 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 La2Ba2CaZn2Ti)3O14 and Pr2Ba2CaZn2Ti3O14 respectively. The dielectric constant is highly stable with frequency and temperature.

【 授权许可】

Unknown