Influence of Reoxidation Time on Electrical Properties of Y2O3-doped BaTiO3 Ceramics Sintered in a Reducing Atmosphere

1st International Conference on Frontiers of Materials Synthesis and Processing

材料科学;化学

Cheng, Xuxin^1 ; Li, Xiaoxia^1 ; Zhao, Zhaoxiong^1

College of Electronic Information and Mechatronic Engineering, Zhaoqing University, Zhaoqing Road, Zhaoqing

526061, China^1

关键词: BaTiO3 ceramics;    Orders of magnitude;    PTCR effects;    Re-oxidation;    Reducing atmosphere;    Sintering temperatures;    Temperature coefficient of resistance;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/274/1/012124/pdf
DOI  :  10.1088/1757-899X/274/1/012124

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The influence of the reoxidation time on electrical properties and the positive temperature coefficient of resistance (PTCR) effect in multilayer Y2O3-doped BaTiO3(BTO) ceramics were investigated. The BTO ceramics were sintered at 1160°C-1270°C for 2 h in a reducing atmosphere and then reoxidized at 500 °C-900 °C for 0 h-4 h. Results indicated that the roomerature resistance of BTO ceramics reoxidized at 750°C for 2 h after sintering at 1160°C-1270°C for 2 h decreased with the increasing of the sintering temperature. As the reoxidation time increased, the roomerature resistance of the BTO samples slightly increased. In addition, the effect of the reoxidation time on the PTCR effect of the ceramics was also studied. The BTO ceramics had a low roomerature resistance of 0.3 and a resistance jump greater than 3.0 orders of magnitude.