Browse > Article
http://dx.doi.org/10.4313/JKEM.2004.17.6.683

A Study on the Microstructure and Electrical Characteristics of ZnO Varistor for d.c. Arrester  

Kim, Seok-Sou (한국전기연구원)
Choi, Ike-Sun (한국전기연구)
Park, Tae-Gon (창원대학교 전기전자제어공학)
Cho, I-Gon (동아타이어공업(주) 절연물사업)
Park, Choon-Hyun (동아타이어공업(주) 절연물사업팀)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.17, no.6, 2004 , pp. 683-689 More about this Journal
Abstract
The microstructure and electrical characteristics of A ∼ C's ZnO varistors fabricated according to variable sintering condition, which sintering temperature was 1130 $^{\circ}C$ and speeds of pusher were A: 2 mm/min, B: 4 mm/min, C: 6 mm/min, respectively, were investigated. The experimental results obtained from this study were summarized as follows: The sintering density of A ∼C's ZnO varistors sintered at 1130 $^{\circ}C$ were decreased by sintering keep time to shorten, such as A: 9hour, B: 4.5hour and C: 3hour. A's ZnO varistor exhibited good densification nearly 98 % of theory density. In the microstructure, A∼C's ZnO varistors fabricated variable sintering condition was consisted of ZnO grain(ZnO), spinel phase(Z $n_{2.33}$S $b_{0.67}$ $O_4$), Bi-rich phasc(B $i_2$ $O_3$), wholly. Varistor voltage of A∼C's ZnO varistors sintered at 1130 $^{\circ}C$ increased in order A
Keywords
ZnO varistor; ZnO grain; Spinel phase; Bi-rich phase; Continuous lightning impulse current test; High current impulse test;
Citations & Related Records
연도 인용수 순위
  • Reference
1 변전설비 보호용 피뢰기 기술 (철도청)
2 한세원, 강형부, 김형식, '$Al_2O_3$가 미량 첨가된 비선형성 ZnO 바리스터의 미세구조와 전도 기구,' 전기전자재료학회논문지, 9권, 7호, p. 708, 1996
3 남춘우, 박춘현, '$ZnO-Pr_6O_{11}CoO-Er_2O_3$계 바리스터의 미세구조 및 전기적 성질,' 전기전자재료학회논문지, 13권, 6호, p. 493, 2000
4 김석수, 조한구, 박태곤, 박춘현, 정세영, 김병규, '배전급 피뢰기용 ZnO 바리스터 소자의 미세구조 및 서지 특성에 관한 연구,' 전기전자재료학회논문지, 15권, 2호, p. 190, 2002
5 M. Matsuoka, 'Nonohmic Properties of Zinc Oxide Ceramics,' Jpn. J. Appl. Phys., Vol. 10, p. 736, 1971   DOI
6 한국산업규격, '갭리스형 금속산화물 피뢰기,' KS C 4616, 1997
7 한국전력공사, '전력용피뢰기,' ES-153-261$\sim$283, 1998
8 J. C. Wurst and J. A. Nelson, 'Lineal Intercept Technique for Measuring Grain Size in Two-Phase Polycrystalline Ceramics,' J. Am. Ceram. Soc., Vol. 97-12, p. 109-111, 1972
9 서울 지하철 공사 표준 규격서, 2000