메뉴 건너뛰기
.. 내서재 .. 알림
소속 기관/학교 인증
인증하면 논문, 학술자료 등을  무료로 열람할 수 있어요.
한국대학교, 누리자동차, 시립도서관 등 나의 기관을 확인해보세요
(국내 대학 90% 이상 구독 중)
로그인 회원가입 고객센터 ENG
주제분류

추천
검색

이용수

표지
📌
연구주제
📖
연구배경
🔬
연구방법
🏆
연구결과
AI에게 요청하기
추천
검색

초록· 키워드

오류제보하기
In this thesis, ZnO varistors with various formulation, such as A~E, were fabricated accoding to ceramic fabrication method. The microstructure, electrical properties, and surge characteristics of ZnO varistors were investigated according to ZnO varistors with various formulation. In the microstructure, A~E's ZnO varistor ceramics sintered at 1130℃ was consisted of ZnO grain(ZnO), spinel phase (Zn2.33Sb0.67O4), Bi-rich phase(Bi2O3) and intergranuler phase, wholly. Lightning impulse residual voltage of A, B, C and E's ZnO varistors suited standard characteristics, below 12㎸ at current of 5㎄. On the contrary, D's ZnO varistor exhibited high residual voltage as high reference voltage. In the accelerated aging test, leakage current and watt loss of B, C and D's ZnO varistors increases abruptly with stress time under the first a.c. stress(115℃/3.213㎸/300h). Consequently, C varistor exhibited a thermal run away. On the contrary, leakage current and watt loss of A and C's ZnO varistors which show low initial leakage current exhibited constant characteristics. After high current impulse test, A's ZnO varistor has broken the side of varistor but impulse current flowed. On the contrary, E's ZnO varistor exhibited good discharge characteristics which the appearance of varistor was not wrong such as puncture, flashover, creaking and other significant damage. After long duration impulse current test, E's ZnO varistor exhibited good discharge characteristics which the appearance of varistor was not wrong such as puncture, flashover, creaking and other significant damage. After high current impulse test and long duration impulse current test, E's ZnO varistor exhibited very good characteristics which variation rate of residual voltage is 1.4% before and after test.

목차

등록된 정보가 없습니다.

참고문헌 (0)

참고문헌 신청

함께 읽어보면 좋을 논문

논문 유사도에 따라 DBpia 가 추천하는 논문입니다. 함께 보면 좋을 연관 논문을 확인해보세요!

이 논문의 저자 정보

최근 본 자료

전체보기

댓글(0)

0