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bo dao du yin fa lan duan mian du zuo gong yi yan jiu
Author(s): 
Pages: 26-29
Year: Issue:  2
Journal: Electroplating & Finishing

Keyword:  工艺研究法兰过渡电阻活泼性孔隙率化学浸蚀电化学钝化化学抛光绝缘物钝化液;
Abstract: <正> 波导常用紫铜、黄铜普通或精密拉制,管内光洁度较高((?)8以上),要求在微波传导中衰减低。为此,必须选用孔隙率低、光洁度高、导电性好的镀层保护波导基体。镀银具有低的电阻率和化学的不活泼性,所以一般国内波导大多数采用镀银、镀钯来满足高频电气要求,保证波导在较高的频率下工作,微波损耗低。同时法兰端面镀银后镀钯,过渡电阻可降低到最大限度。因为钯在高温、高湿或硫化氢含量较高的空气中性能稳定,而且镀钯层的硬
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