Study on electrical properties of Ni-doped SrTiO3 ceramics using impedance spectroscopy

Bulletin of materials science

S K Rout²  J Bera¹  S Panigrahi² 

[1]Department of Ceramic Engineering, National Institute of Technology, Rourkela 769 008, India$$Department of Ceramic Engineering, National Institute of Technology, Rourkela 769 008, IndiaDepartment of Ceramic Engineering, National Institute of Technology, Rourkela 769 008, India$$

[2]Department of Physics, National Institute of Technology, Rourkela 769 008, India$$Department of Physics, National Institute of Technology, Rourkela 769 008, IndiaDepartment of Physics, National Institute of Technology, Rourkela 769 008, India$$

关键词: Ni doped SrTiO3;    impedance spectroscopy;    grain;    grain boundary;    acceptor.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

The ceramics, SrTiO₃ (ST) and 0.4, 0.8 atom% Ni doped SrTiO₃, were prepared by solid state reaction route. The average grain size of undoped and doped samples was measured and found to be 1.2, 1.9 and 3.7 𝜇m, respectively. The impedance measurements were conducted at 400â€�??600°C to separate grain and grain boundary contributions. The grain and grain boundaries relaxation frequencies were shifted to higher frequency with temperature. Bulk resistance of doped and undoped ST ceramics was more or less the same. Single grain boundary resistance of doped sample was higher than that of undoped one, indicating that GB resistance increases with acceptor doping. Activation energies were calculated to confirm the same.

【 授权许可】

Unknown