Emission and Crystal Size of Oxide-Coated Cathodes.

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概要

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• The thermionic emission and the crystal size of several oxide cathodes, BaO, SrO, double and triple oxide which were converted from equal molar carbonate solid solutions, were studied. The thermionic emission of the oxides was measured by cathode ray tube and the crystal size were determined by the method of small angle x-ray scattering and the x-ray was measured by means of Geiger tube. For this purpose the oxide materials were stripped from the nickel sleeves and coated by a protective film. The crystal sire of ox-ides which were suitably converted from carbonates were found in the range from 200 to 300 angstroms except BaO. In the case of (BaSr)O, the emission and crystal size were measured at different stage of heat, treatment. Especially such an oxide that was exposed to air after decomposition of carbonate and showed a very poor thermionic emission exhibited a decided crystal growth.

• 一般社団法人日本物理学会の論文
• 1951-12-25

著者

• Shimazu Jitsuo

  Matsuda Research Laboratory Tokyo Shibaura Electric Co.

関連論文

• Emission and Crystal Size of Oxide-Coated Cathodes.

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