CRT용 산화물 케소드에 관한 연구 = A Study on Electron Emission Improvement of Cathode for High Resolution Braun Vacuum Tabe

다국어 초록 (Multilingual Abstract)

In the conventional oxide-coated cathode, saturated current density is usually limited to 2 A/㎠ approximately which is insufficient for the larger-size high-resolution CRT. In this paper, the author analyses the resistive effect of the interface layer using an electrical model of beam current circuit and explains how the current density can be increased by suppressing the accumulation of the layer.
Through a series of experiments, the author has found that, by dispersing approximately 1% of scandium oxide into the conventional mixture of (Ba, Ca, Sr)CO₃ at coating process, followed by careful decomposition and activation, the accumulation of the layer can be successfully suppressed and satuation current incresed up to 4.51 A/㎠. The V-Ⅰ characteristics measured on the sample fairly matched with the results of theoretical analysis.

목차 (Table of Contents)

• Ⅰ. 서론
• Ⅱ. CRT용 산화물 케소드의 열전자 방출
• 1. 현용 CRT 케소드의 구조와 특징
• 2. 전자방출 이론
• 3. 중간층의 특성
• 3.1 중간층의 생성과 그 장애
• 3.2 중간층의 전기적 특성
• Ⅲ. 제안된 케소드
• 1. 중간층의 생성 억제
• 2. Sc 산화물의 작용
• 3. 중간층 제거 효과
• Ⅳ. 실험 및 측정
• 1. 실험방법
• 2. 실험 샘플의 제작
• 2.1 기계적 구조
• 2.2 전자방출피막의 제조
• 2.3 건조와 검사
• 2.4 열분해 및 활성화 처리
• 3. 측정 및 결과
• 3.1 측정방법
• 3.2 측정결과
• 3.3 검토
• Ⅴ. 결론
• 참고문헌
• 영문초록