基本信息:
- 专利标题： ELECTRON-TUBE CATHODE
- 专利标题（中）：阴极的电子管
- 申请号：EP96904298 申请日：1996-02-29
- 公开(公告)号：EP0847071A4 公开(公告)日：2000-03-01
- 发明人： SAKURAI HIROSHI , HAYASHIDA YOSHIKI , KUBO MASAYUKI , YAMASHITA KATSUYUKI
- 申请人： MATSUSHITA ELECTRONICS CORP
- 专利权人： MATSUSHITA ELECTRONICS CORP
- 当前专利权人： MATSUSHITA ELECTRONICS CORP
- 优先权： JP9600493 1996-02-29
- 主分类号： H01J1/142
- IPC分类号： H01J1/142
摘要：
An electron-tube cathode made by forming on the base material an emitter mainly comprising alkaline earth metal oxides prepared by depositing carbonates of alkaline earth metals including at least barium on the base material and pyrolyzing the carbonates in a vacuum, wherein the carbonates comprise a mixture of at least two kinds of alkaline earth metal carbonate crystal grains having different configurations. The cathode is improved in both cut-off variation and emission characteristics and is useful as a cathode of CRTs and a cathode of electron tubes used as electron guns of electron microscopes.