PECT激光钎焊技术的研究

针对复合结构压电陶瓷变压器 (PECT)叠片式发电元件的侧电极引出问题，对钎焊工艺进行了研究分析，并建立了激光钎焊系统。实践证明，激光钎焊技术应用于 PECT侧电极引出，连接可靠，全连通率高，热影响小；所建立的钎焊系统应用于生产，运行精确可靠，符合激光钎焊要求。

Numerical simulation of temperature field in multilayer heterogeneity lamination laser soldering

A temperature field numerical simulation is carried out using the finite element method for laser soldering on PECT (piezoelectric ceramics transformer). A three dimensional model of laser soldering temperature field of multilayer materials is established. Then, the model was simplified in order to perform an efficient finite element analysis. Moreover, the temperature distribution characteristic in the laser soldering is investigated and verified by experiments. In all cases, the numerical results are in good agreement with the experimental measurements.

良好的家教使孩子终生受益无穷

孔子说,少成若天性,习惯成自然。人小时候如果在家庭里接受了良好的家庭教育,形成了良好的处世、做人、学习习惯,将会终生受益无穷,给人一生的发展打下良好的基础。著名爱国将领朱庆澜说得好:“小孩子生下来好像雪白的丝,在家里养活了六年,好似第一道染缸;六岁进了学堂,好似第二道染缸;二十岁以后出了学堂到世上同人办事,好似第三道染缸。”