This paper has been mentioned blacking of ceramic glaze of Vacuum interrupter by carbon element, It points out Blacking is affected by several technology parameters and blacking problem is settled.

• 叙述了金属化后碳元素引起真空开关管管壳瓷釉发黑的机理,指出了各种工艺参数对釉面发黑的影响及其解决办法。