电瓷避雷器Issue(5)：77-82,6.DOI:10.16188/j.isa.1003-8337.2025.05.010
硝酸铝掺杂氧化锌压敏电阻的制备及性能研究
Preparation and Properties of Aluminium Nitrate Doped Zinc Oxide Varistor
王国群 1涂远生 1黄俊逸 1时天竣 1吴桐 1武东辉 2桂阳海 2黄海1
作者信息
- 1. 南阳金牛电气有限公司 河南南阳 473000
- 2. 郑州轻工业大学材料与化学工程学院,郑州 450000
- 折叠
摘要
Abstract
ZnO-Bi2O3-based varistor ceramics were prepared by solid-phase sintering method to study the effect of the doping amount of Al(NO3)·9H2O on the microstructure and electrical properties of ZnO varistor.The physical phase,micro-morphology and electrical properties of the samples were character-ised by X-ray diffractometer(XRD),field emission scanning electron microscope(FESEM)and elec-trochemical workstation,respectively.The results show that the addition of Al(NO3)·9H2O not only has the effect of promoting the growth of ZnO grains and enhancing the uniform distribution of grains,but also significantly reduces the resistance of ZnO grains,which in turn reduces the residual voltage ratio.In the range of(0～0.015)％(molar fraction,the same below)of Al(NO3)·9H2O addition,the voltage gradient of the varistor gradually decreased with the increase of the addition amount,and the residual volt-age ratio firstly decreased and then remained unchanged.While the doping amount of Al(NO3)·9H2O is 0.01％,the ZnO varistor has excellent electrical properties:potential gradient E1 mA=298 V·mm-1,leakage current JL=0.3 μA·cm-2,nonlinear coefficient α=32,and residual voltage ratio K=1.75.关键词
硝酸铝/氧化锌/压敏电阻/微观结构/电气性能Key words
Aluminium nitrate/ZnO/varistor/micro-morphology/electrical properties引用本文复制引用
王国群,涂远生,黄俊逸,时天竣,吴桐,武东辉,桂阳海,黄海..硝酸铝掺杂氧化锌压敏电阻的制备及性能研究[J].电瓷避雷器,2025,(5):77-82,6.
