针对压电陶瓷变压器 ( PECT)侧电极的连接问题 ,提出了激光钎焊的工艺方法 ,采用金属网辅助钎膏钎接片单元工艺 ,很好地解决了多层元件不同性质分割区域表面的连接问题 ,激光钎焊接头全连通率高 ,热影响小 ,质量好。建立了三维多层异质复合结构 PECT的激光钎焊温度场数学模型 ,通过数值模拟的方法计算了 PECT激光钎焊温度场的分布情况 ,取得了比较理想的结果 ,激光钎焊工艺及温度场的分析研究 ,将会推动压电陶瓷变压器的实用化进程 ,对类似问题的解决也会有一定的借鉴意义 Aiming at the problem of the connection of PECT side electrodes, a laser brazing process is proposed. The metal mesh is used to assist the process of solder paste brazing sheet unit, so that the connection of the surface of the multi-layer components with different properties is well solved The problem, the laser connected joints full connectivity rate, thermal effects, good quality. The mathematical model of laser brazing temperature field for three-dimensional multi-layer heterogeneous composite structure PECT has been established. The distribution of temperature field of PECT laser brazing has been calculated by numerical simulation. The ideal result has been obtained. The laser brazing process and temperature field Analysis and research, will promote the practical process of piezoelectric ceramic transformers, the resolution of similar problems will have some reference