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공공누리This item is licensed Korea Open Government License

Title
Microwave dilelectric loss of thermally stressed MgTiO3 via TEM observation
Author(s)
유선희윤기현최지원
Publication Year
2008-12-31
Abstract
The influence of cooling rate on the dielectric loss of MgTiO3 ceramics at microwave frequencies via thermal stress and TEM was investigated. The specimens were cooled down with 1, 5, 30 degrees C/min and air-quenching from the sintering temperature of 1,350 degrees C. As the cooling rate increased, Q.f value decreased due to an increase of the crystallographic strain. The line defects such as dislocations increased with an increase of cooling rate except the specimen cooled down at 1 degrees C/min, which showed no dislocation. This result revealed that the line defects contribute to the deterioration of dielectric losses.
Keyword
Dielectric loss; MgTiO3; Thermal strain; Cooling rate; Dislocation
Journal Title
Journal of electroceramics[웹저널]
Citation Volume
21
ISSN
1385-3449
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Appears in Collections:
7. KISTI 연구성과 > 학술지 발표논문
URI
https://repository.kisti.re.kr/handle/10580/13783
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