| With the rapid development of modem science and technology, there is a growing need for chip components. But the electrodes of chip components are more precious metals Pd that takes more than half of chip components' price. So it is a research hot spot home and abroad of that base metals Ni> Cu replace precious metals for reduce costs. This research adopted drop chemical treatment and vacuum heat treatment envelops a thin crust of protective Ag, and fabric coating Ag/Ni bimetallic powder, through microcosmic surface topography observe of SEM, XRD map analysis, granularity test and TG test research, and fabricate piezoelectricity used for electrodes, the results as follow:The best process of fabricate coating bimetallic powder: the ratio is 2:1; temperature of heat treatment is 500℃; time of heat treatment is 5h. the coating effect is largely responsible for ratio of Ag and Ni, but to the coating powder of same ratio of Ag and Ni, its coating effect has very big difference with difference heat treatment process. It showed that vacuum heat treatment can improve coating effect of coating powder.The coating powder fabricated in this experiment, its antioxidation temperature is above 850°C, and it can satisfy the requirements of high temperature sintering at standard atmospheric pressure. Compared with Ag -. Ag/Pd, the coating powder electrodes had the influence ranking just below Ag/Pd electrodes, but better than Ag> Ag/Cu electrodes. Ag/Ni coating powder can meet the performance request ofcomponents.The method of coating metal powder adopted drop chemical treatment, had better controllability, coating was better compact, had better inhibits oxidation. Diffuse speed of Ag/Ni in piezoelectricity ceramics was slower than Ag/Pd, faster than Ag/Cu-. Ag,and this is the essence that inhibits transfer ability.
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