【作者】 王艳珍； 钟庆东； 施利毅； 徐东；

【Author】 Wang Yan-zhen~(1,2)Zhong Qing-dong~3 Shi Li-yi~1 Xu Dong~(1,3)(1.Research Center of Nano Science and Technology,Shanghai University,Shanghai 200444;2.School of Environmental and chemical Engineering;3.School of Materials Science and Engineering,Shanghai University,200072,China;)

【机构】 上海大学纳米科学与技术研究中心； 上海大学环境与化学工程学院； 上海大学材料科学与工程学院；

【摘要】 采用行星式高能球磨混合制备了不同混合时间的氧化锌阀片粉体,用单向压力机压成坯体做成研究电极。运用交流阻抗和电容测量电化学方法对上述电极进行了测试。结果表明,随着氧化锌与混合添加剂粉体混合时间的延长,其阻抗减小;Mott-Schottky分析表明,混合粉体为n型半导体,且随着混合时间的延长施主载流子浓度减小。更多还原

【Abstract】 These ZnO varistor powder were prepared by high-energy ball milling with different time,then these blend pow- der were compacted and made into electrodes.The electrochemical properties of different electrode were investigated in 0. 5 mol/L NaCl solution through electrochemical impedance spectroscopy and capacitance measurement.The result revealed that the whole powder behave as n-tape semiconductors and the donor density decreased by Mott-Schottky analysis ac- cording to the time of mixing in the ball-mill.更多还原