Paper Title:
Research on Mechanism of Improving Electrical Properties of ZnO Varistor Ceramics by Laser Shock Processing
  Abstract

In order to improve electrical properties, annealed ZnO varistor ceramics have been treated by laser shock processing (LSP). Electrical parameters of the annealed ZnO varistor ceramics were measured by CJ1001 Varistor Tester. Morphology and microstructure of the annealed ZnO varistor ceramics were gained by XRD and SEM. The results indicate that compared with the electrical properties of the annealed ZnO varistor ceramics, the voltage gradient of the ZnO varistor ceramics treated by LSP remains the same, the nonlinear coefficient substantially increases by 31.6%, and the leakage current reduces by 33.3%. Meanwhile, the phase composition of the annealed ZnO varistor ceramics is mainly composed of ZnO main phase, Zn2.33Sb0.67O4, β-Bi2O3, and δ-Bi2O3 phase; while the phase composition of the ZnO varistor ceramics remains the above four phases in the compound state (anneal and then LSP), but the content of δ-Bi2O3 phase increases. The increase of δ-Bi2O3 phase content is the main reason for improving the electrical properties of the annealed ZnO varistor ceramics.

  Info
Periodical
Edited by
Yi-Min Deng, Aibing Yu, Weihua Li and Di Zheng
Pages
1045-1049
DOI
10.4028/www.scientific.net/AMM.37-38.1045
Citation
R. F. Chen, Y. Q. Hua, G. Ji, Z. Z. Sun, "Research on Mechanism of Improving Electrical Properties of ZnO Varistor Ceramics by Laser Shock Processing", Applied Mechanics and Materials, Vols. 37-38, pp. 1045-1049, 2010
Online since
November 2010
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Akimasa Kinoshita, Takashi Nishi, Takasumi Ohyanagi, Tsutomu Yatsuo, Kenji Fukuda, Hajime Okumura, Kazuo Arai
Abstract:The reaction and phase formation of the Ti/SiC Schottky contact as a function of the annealing temperature (400~700oC) were investigated....
643
Authors: Wen Jun He, Guang Hui Min, Oleg V. Tolochko
Abstract:Crystal structures and shape memory properties of Ti-rich Ti52Ni23Cu25 (at.%) ribbon annealed at 450°C for 10 min and 1 h were investigated...
2259
Authors: Jie Shi, Wen Quan Cao, Han Dong
Abstract:In this study a C-Mn High Strength Low Alloy steel (HSLAs) was processed by quenching and austenite reverted transformation during annealing...
238
Authors: Subramani Shanmugan, Mutharasu Devarajan, Kamarulazizi Ibrahim
Chapter 1: Materials Behavior
Abstract:Sb layered Te/Cd thin films have been prepared by using Stacked Elemental Layer (SEL) method. The presence of mixed phases (CdTe and Sb2Te3)...
76
Authors: Xiao Hua Sun, Shuang Hou, Zhi Meng Luo, Cai Hua Huang, Zong Zhi Hu
Chapter 1: Engineering Science for Manufacturing
Abstract:Bismuth zinc niobate titanium (Bi1.5Zn0.5 Nb0.5Ti1.5O7) (BZNT) thin films were deposited on PtTiSiO2Si substrates by radio frequency (rf)...
211