发明授权
US3970888A Tungsten-thorium dioxide-aluminum oxide mass for a high-temperature-resistant emission electrode and process for the production thereof 失效
用于耐高温发射电极的二氧化钨 - 二氧化铈 - 氧化铝质量及其制造方法

  • 专利标题: Tungsten-thorium dioxide-aluminum oxide mass for a high-temperature-resistant emission electrode and process for the production thereof
  • 专利标题(中): 用于耐高温发射电极的二氧化钨 - 二氧化铈 - 氧化铝质量及其制造方法
  • 申请号: US491040
    申请日: 1974-07-23
  • 公开(公告)号: US3970888A
    公开(公告)日: 1976-07-20
  • 发明人: Hermann Trattner
  • 申请人: Hermann Trattner
  • 申请人地址: DT Berlin & Munich
  • 专利权人: Siemens Aktiengesellschaft
  • 当前专利权人: Siemens Aktiengesellschaft
  • 当前专利权人地址: DT Berlin & Munich
  • 优先权: DT2337344 19730723
  • 主分类号: B23K35/32
  • IPC分类号: B23K35/32 H01J1/14 H01J1/15 H01J9/04 H01J19/06
Tungsten-thorium dioxide-aluminum oxide mass for a
high-temperature-resistant emission electrode and process for the
production thereof
摘要:
A mass for emission electrodes and the like operating at high temperatures, employing a mixture of thorium dioxide and aluminum oxide, which contains tungsten, the thorium dioxide being present from 33-50% by weight, and the aluminum oxide from 4-15%, to which mixture is added 63-35% of tungsten powder, the powdered tungsten preferably being imbedded in a crystalline melt of thorium dioxide and aluminum dioxide, and a method of producing the same.
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