摘要
采用固相球磨和冷冻干燥法制备了AgCl粉体,按一定比例将AgCl和Ag粉均匀混合压片成型,然后烧结。运用XRD、SEM、eDAQ电化学工作站和超低噪声放大器,对样品的相组成、显微形貌及电化学性能进行表征。结果表明:所制备的Ag/AgCl电极外观形貌好,表面缺陷少,AgCl和Ag粉混合均匀。电极实测极差电位稳定性良好,24小时波动仍在0.1mV以内,经过15天后,其极差电位波动在0.1mV内,低频段下自噪声性能良好,达到nV级水平,满足海洋大地电磁勘探检测电场的要求。
AgCl powder was synthesized via a simple solid ball-milling and freeze-dried method,and then mixed with Ag powder by a certain percentage and finally was pressure formed and sintered.XRD,SEM and eDAQ electrochemical analyzers and Ultra-low-noise amplifiers were used as detection means for the phase composition of the samples,microscopic morphology and electrochemical properties.The results show that the prepared Ag/AgCl electrodes have good surface shape and few surface defects and that AgCl and Ag powders are well-distributed.The electrodes have good stability.Their fluctuation is within 0.1 mV or less in 24 hours.In 15 days,the fluctuation still stays within 0.1 mV.The electrode noise in the low-frequency performs well,achieving the nV level,and can be used to detect the weak electrical signals in the ocean.
出处
《电子科技》
2010年第6期29-31,34,共4页
Electronic Science and Technology
