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DC Field | Value | Language |
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dc.citation.number | 3 | - |
dc.citation.title | JOURNAL OF APPLIED PHYSICS | - |
dc.citation.volume | 109 | - |
dc.contributor.author | Dittmer, Robert | - |
dc.contributor.author | Jo, Wook | - |
dc.contributor.author | Damjanovic, Dragan | - |
dc.contributor.author | Roedel, Juergen | - |
dc.date.accessioned | 2023-12-22T06:36:29Z | - |
dc.date.available | 2023-12-22T06:36:29Z | - |
dc.date.created | 2014-10-21 | - |
dc.date.issued | 2011-02 | - |
dc.description.abstract | The dielectric, electrical and structural properties of (1-x) (0.94Bi(1/2)Na(1/2)TiO(3)-0.06BaTiO(3))-xK(0.5)Na(0.5)NbO(3) (BNT-BT-xKNN) with x=0.09, 0.12, 0.15, and 0.18 were investigated as potential candidates for high-temperature capacitors with a working temperature far beyond 200 degrees C. Temperature dependent dielectric permittivity (epsilon) showed two local broad maxima that at the optimal composition of KNN (x=0.18) are combined to form a plateau. This then results in a highly temperature-insensitive permittivity up to similar to 300 degrees C at the expense of a small reduction in absolute permittivity values. High-temperature in situ x-ray diffraction study showed pseudocubic symmetry without obvious structural changes, which implies that the dielectric anomalies observed could only be a consequence of a slight change in space group. BNT-BT-0.18KNN showed a permittivity of similar to 2150 at the frequency of 1 kHz at 150 degrees C with a normalized permittivity epsilon/epsilon(150 degrees C) varying no more than +/- 10% from 43 to 319 degrees C. With very good electrical properties persisting up to 300 degrees C, i.e., a resistivity on the order of magnitude of 10(8) Omega m and the RC constant of about 1 s, the examined BNT-BT-xKNN compositions present a good starting point for the development of high-temperature capacitor materials. | - |
dc.identifier.bibliographicCitation | JOURNAL OF APPLIED PHYSICS, v.109, no.3 | - |
dc.identifier.doi | 10.1063/1.3544481 | - |
dc.identifier.issn | 0021-8979 | - |
dc.identifier.scopusid | 2-s2.0-79951822506 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/7558 | - |
dc.identifier.url | http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=79951822506 | - |
dc.identifier.wosid | 000287366000073 | - |
dc.language | 영어 | - |
dc.publisher | AMER INST PHYSICS | - |
dc.title | Lead-free high-temperature dielectrics with wide operational range | - |
dc.type | Article | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
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