Thermionic Electron Emission from a Mayenite Electride--Metallic Titanium Composite Cathode

スポンサーリンク

概要

• 論文の詳細を見る

• A composite thermionic cathode consisting of 12CaO\Cdot7Al2O3 (C12A7) electride and metallic Ti (70:30 vol %) was fabricated as an electron emitter, and the thermionic electron emission properties were evaluated. A high emission current density of {\sim}1.4 mA cm-2 was achieved at 700 °C with an electric field of 4.0\times 10^{4} V cm-1. The work function evaluated from the Richardson--Dushman equation was 2.1\pm 0.3 eV, which coincides with the value for pure C12A7 electride and is lower than that for LaB6. Unlike the pure material, the composite has ohmic contact with metallic materials, and can be heated directly by electrical current.

• 2013-01-25

著者

• Hayashi Katsuro

  Secure Materials Center, Materials and Structures Laboratory, Tokyo Institute of Technology, Yokohama 226-8503, Japan

• Yoshizumi Toshihiro

  Secure Materials Center, Materials and Structures Laboratory, Tokyo Institute of Technology, Yokohama 226-8503, Japan

• HAYASHI Katsuro

  Secure Materials Center, Materials and Structures Laboratory, Tokyo Institute of Technology

関連論文

• Thermionic Electron Emission from a Mayenite Electride--Metallic Titanium Composite Cathode

スポンサーリンク