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碳化硅棒加热的高温箱式电炉常因接线卡子打火而烧坏,有时还使碳化硅棒报废,为此对卡子的改进十分重视。原来用耐热不锈钢制作,它强度高、弹性小,与碳化硅棒硬碰硬,往往因怕松动而把碳化硅棒夹碎;后又改为铜、铝制作,虽质地较软、导电率高,但膨胀系数大、易氧化、强度差。后来,我们发现卡子与碳化硅棒接触不好的主要原因是碳化硅棒表面粗糙,卡子再紧接触也不好。针对这一问题我们采用3毫米厚低碳钢板制作卡子,
Silicon carbide rods heated by high temperature box-type furnace often because of wiring clamps burn and burn, and sometimes make silicon carbide rods scrapped, for the improvement of the clamp attaches great importance. Originally made of heat-resistant stainless steel, it is high strength, low elasticity, rigid with silicon carbide rods, often because of fear of loose and silicon carbide rods broken; later changed to copper, aluminum production, although the texture is soft, high conductivity, However, the expansion coefficient, easy oxidation, poor strength. Later, we found that the main reason for poor contact between the clip and the silicon carbide stick is that the silicon carbide stick has a rough surface and the clip is not in good contact with the silicon carbide stick. In response to this problem we use 3 mm thick carbon steel plate clip,