发明授权
- 专利标题： Hexaboride electron emissive material
- 专利标题（中）： 六硼化物电子发射材料
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申请号： US503471申请日： 1974-09-05
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公开(公告)号： US3932314A公开(公告)日： 1976-01-13
- 发明人: Ushio Kawabe , Shigehiko Yamamoto , Toshiyuki Aita , Yukio Honda
- 申请人： Ushio Kawabe , Shigehiko Yamamoto , Toshiyuki Aita , Yukio Honda
- 申请人地址： JA
- 专利权人： Hitachi, Ltd.
- 当前专利权人： Hitachi, Ltd.
- 当前专利权人地址： JA
- 优先权： JA48-99231 19730905
- 主分类号： H01J1/30
- IPC分类号： H01J1/30 ; C01B35/04 ; C04B35/58 ; H01J1/14 ; H01J1/148 ; H01J1/304 ; H01B1/06
摘要：
An electron emissive material of the formula (Y.sub.1.sub.-x EU.sub.x)B.sub.6 having the calcium hexaboride type crystal structure can easily produce hexaborides of the single phase. These borides have a number of merits such as small work function, high mechanical properties and low vapor pressure, and they are far more excellent than prior-art materials when used in a thermionic emission cathode and a field emission type cold cathode.
公开/授权文献
- US5134750A Cleaner with conversion valve arrangement 公开/授权日：1992-08-04