Method for the thermal treatment of tungsten electrodes free from thorium oxide for high-pressure discharge lamps

Method for the thermal treatment of tungsten electrodes free from thorium oxide for high-pressure discharge lamps

  • CN 1,942,999 A
  • Filed: 04/15/2005
  • Published: 04/04/2007
  • Est. Priority Date: 04/21/2004
  • Status: Active Grant
First Claim
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1. heat treatment method that is used for the tungsten electrode of the oxygen-free thorium of high-pressure discharge lamp, it is characterized in that, tungsten electrode by pure tungsten or the tungsten of mixing potassium at least form, described electrode has fibrous microstructure, the maximum temperature in the heat treatment is lower than the recrystallization temperature of the material of tungsten electrode.

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