公开(公告)号：WO1997032330A1

公开(公告)日：1997-09-04

申请号：PCT/JP1996000493

申请日：1996-02-29

Applicant: MATSUSHITA ELECTRONICS CORPORATION ,  SAKURAI, Hiroshi ,  HAYASHIDA, Yoshiki ,  KUBO, Masayuki ,  YAMASHITA, Katsuyuki

Inventor： MATSUSHITA ELECTRONICS CORPORATION

IPC: H01J01/142

CPC classification number: H01J1/142

Abstract: 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.

Abstract translation: 一种电子管阴极，其通过在基底材料上形成主要包含碱土金属氧化物的发射体，其通过在基底材料上沉积包括至少钡的碱土金属的碳酸盐和在真空中热解碳酸盐而制备，其中碳酸盐包含混合物 的至少两种具有不同构型的碱土金属碳酸盐晶粒。 阴极在截止变化和发射特性方面都得到改善，并且可用作CRT的阴极和用作电子显微镜的电子枪的电子管的阴极。