Copper-Base Clad Metal for Receiving Tube Anodes

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  • 受信管陽極用銅基体合板金属
  • ジュシンカン ヨウキョクヨウ ドウ キタイ ゴウハン キンゾク

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The materials for anodes of miniaturized electron tubes, especially htgh power receiving tubes, must be proof enough against great anode loss. And in many cases, aluminium-clad iron does not meet the requirement enough. Therefore, a five-layer clad metal, the base being very good heat-conductive pure copper with both sides coated with iron first and with aluminium next, has been examined and the following results have been obtained. (1) The optimum conditions of heat treatment are as follows: 10 min heating at 450°, 500°C or 550°C in the air and then 5 min hydrogen treatment at 700°C, or 10 min heating at 450°C or 500°C in the air and then 5 min hydrogen treatment at 800°C. It tends to evolve less quantity of gas than aluminium-clad iron. (2) In the range of anode loss from approximately 1 watt/cm2 to 4′ watr/cm2, the metal concerned has been clearly found to be proof against anode loss more than aluminium-clad iron and to be, therfore, very suitable for an anode material for high-power tubes. Moreover, it showed satisfactory results in practical test. (3) It has sufficient workability for forming anode.

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