IR-COATED DISPENSER CATHODE FOR CRT

被引：9

作者：

KIMURA, S

YAKABE, T

MATSUMOTO, S

MIYAZAKI, D

YOSHII, T

FUJIWARA, M

KOSHIGOE, S

机构：

[1] TOSHIBA CO LTD,HIMEJI WORKS,YOBE KU,HIMEJI 67112,JAPAN

[2] TOSHIBA CO LTD,DIV CATHODE RAY TUBE,FUKAYA 366,JAPAN

来源：

IEEE TRANSACTIONS ON ELECTRON DEVICES | 1990年 / 37卷 / 12期

关键词：

D O I：

10.1109/16.64533

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A compact dispenser cathode has been developed for application to cathode ray tube (CRT). Cathode emitter, comprising BaO. CaO, and A12oj in a molar ratio of 4:1:1, was impregnated into a porous tungsten pellet. Intermetallic compound of tungsten and iridium was formed on the cathode pellet. Heater ratings were 6.3 V x 0.2 A. Emission characteristics were measured by using color CRT’s. As the result, a cathode peak loading of 15 A/cm2 was ensured in the space-charge region. Furthermore, life tests with a peak loading of 7.5 A/cm2 were conducted over the 10 000 h. The decrease in emission current after 10 000 h was within only 10% of the initial value. Reliability of cathode performance was assured in terms of breakdown potential between the heater and the cathode, emission characteristics, life performance, grid emission, and the drift in cutoff potential. In addition, the effects of the coating thickness upon the emission characteristics is discussed. © 1990 IEEE

引用

页码：2564 / 2567

页数：4