激光技术2011，Vol.35Issue(1)：133-136,4.DOI:10.3969/j.issn.1001-3806.2011.01.036
激光冲击波对ZnO压敏陶瓷电学性能的影响
Effect of laser shock wave on electrical property of ZnO varistor ceramics
摘要
Abstract
In order to study the influence of laser shock on the electrical property of ZnO varistor ceramics, ZnO varistor ceramics was shocked by an Nd: YAG laser. Electrical parameters of ZnO varistor ceramics were measured with a CJl001 varistor tester and morphology and microstructure of ZnO varistor ceramics was characterized by X-ray diffraction and scanning electron microscope. The experimental data of electrical property of ZnO varistor ceramics was obtained by laser shock process. The results indicate that after laser shock processing, the voltage gradient of ZnO varistor ceramics was reduced by 15.6％; its nonlinear coefficient substantially increased by 43.4％ and leakage current reduced by 50％. Phase composition of ZnO varistor ceramics includes mainly ZnO main phase, Zn2 33Sb0 67O4 phase and β-Bi2O3 phase in high-temperature sintering. However, it include not only the former three phases, but also the new phase δ-Bi2O3 phase after laser shock process. The emergence of the new phase is the main cause for change of the electrical property of ZnO varistor ceramics.关键词
激光技术/相变/激光冲击/电位梯度/非线性系数/漏电流Key words
laser technique/ phase transition/ laser shock/ voltage gradient/ nonlinear coefficient/ leakage current分类
通用工业技术引用本文复制引用
花银群,吉光,孙真真,陈瑞芳..激光冲击波对ZnO压敏陶瓷电学性能的影响[J].激光技术,2011,35(1):133-136,4.基金项目
国家自然科学基金资助项目(50451004) （50451004）
