Microstructure and transport properties of multiwall carbon nanotube-reinforced barium zirconium titanate ceramics

Bulletin of Materials Science

R L RAIBAGKAR^3¹  RAGHAVENDRA SAGAR^1,2³ 

[1] Department of Physics, Mangalore Institute of Technology & Engineering, Badaga Mijar, Moodabidre, Dakshina Kannada 574 225, Karnataka, India^2;Department of Post Graduate Studies and Research in Applied Electronics, Gulbarga University, Gulbarga 585 106, Karnataka, India^3;Department of Post Graduate Studies and Research in Materials Science, Gulbarga University, Gulbarga 585 106, Karnataka, India^1

关键词: Multiwall carbon nanotubes;    barium zirconium titanate;    microstructure;    dc-conductivity;    Seebeck coefficient.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

The influence of multiwall carbon nanotubes (MWCNTs) reinforced on microstructures and their transport properties on pure and cerium-substituted barium zirconium titanate (BZT) ceramics are reported in this study. The MWCNTswere prepared by a low-temperature sonochemical/hydrothermal method using dichloromethane as a carbon source. These MWCNTs were mixed with the as-prepared ceramic powders before heat treatment to obtain a reinforced product. The scanning electron micrographs reveal the successful incorporation of carbon nanotubes in BZT ceramics. The temperature dependent direct current (dc)-resistivity was less for MWCNT-reinforced ceramics in contrast to that of pure ceramics. The decrease in the dc resistivity was due to the superior electrical behaviour of MWCNTs, which act as a connector between ceramic grains. The Seebeck coefficient of cerium-substituted-BZT improved after reinforcing the MWCNTs.

【 授权许可】

CC BY