Abstract
Samples of 1/6Ba5Nb4O15· 5/6BaNb2O6 along with the pure end members, Ba5Nb4O15 and BaNb2O6, were sintered under low oxygen partial pressure. The degradation mechanisms of dielectric loss in this reducing atmosphere have been studied. We found that the degradation occurred primarily due to the formation of oxygen vacancies caused by the reduction of Nb5+. This was determined by measuring the electrical conductivity, and through X-ray photoelectron spectroscopy. More importantly, the dielectric loss of 1/6Ba5Nb4O15·5/6BaNb2 O6 samples with higher temperature stability was further decreased on sintering in a reducing atmosphere. This observation has been explained by considering the increased porosity and formation of a reduced second phase, Ba0.65NbO3.
| Original language | English |
|---|---|
| Pages (from-to) | 795-799 |
| Number of pages | 5 |
| Journal | Journal of the American Ceramic Society |
| Volume | 86 |
| Issue number | 5 |
| Publication status | Published - 2003 May 1 |
| Externally published | Yes |
Fingerprint
ASJC Scopus subject areas
- Ceramics and Composites
Cite this
Atmospheric dependence on dielectric loss of 1/6Ba5Nb4O15·5/6BaNb2 O6 ceramics. / Kim, Dong-Wan; Kwon, Do Kyun; Hong, Kug Sun; Kim, Deug Joong.
In: Journal of the American Ceramic Society, Vol. 86, No. 5, 01.05.2003, p. 795-799.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Atmospheric dependence on dielectric loss of 1/6Ba5Nb4O15·5/6BaNb2 O6 ceramics
AU - Kim, Dong-Wan
AU - Kwon, Do Kyun
AU - Hong, Kug Sun
AU - Kim, Deug Joong
PY - 2003/5/1
Y1 - 2003/5/1
N2 - Samples of 1/6Ba5Nb4O15· 5/6BaNb2O6 along with the pure end members, Ba5Nb4O15 and BaNb2O6, were sintered under low oxygen partial pressure. The degradation mechanisms of dielectric loss in this reducing atmosphere have been studied. We found that the degradation occurred primarily due to the formation of oxygen vacancies caused by the reduction of Nb5+. This was determined by measuring the electrical conductivity, and through X-ray photoelectron spectroscopy. More importantly, the dielectric loss of 1/6Ba5Nb4O15·5/6BaNb2 O6 samples with higher temperature stability was further decreased on sintering in a reducing atmosphere. This observation has been explained by considering the increased porosity and formation of a reduced second phase, Ba0.65NbO3.
AB - Samples of 1/6Ba5Nb4O15· 5/6BaNb2O6 along with the pure end members, Ba5Nb4O15 and BaNb2O6, were sintered under low oxygen partial pressure. The degradation mechanisms of dielectric loss in this reducing atmosphere have been studied. We found that the degradation occurred primarily due to the formation of oxygen vacancies caused by the reduction of Nb5+. This was determined by measuring the electrical conductivity, and through X-ray photoelectron spectroscopy. More importantly, the dielectric loss of 1/6Ba5Nb4O15·5/6BaNb2 O6 samples with higher temperature stability was further decreased on sintering in a reducing atmosphere. This observation has been explained by considering the increased porosity and formation of a reduced second phase, Ba0.65NbO3.
UR - http://www.scopus.com/inward/record.url?scp=0038622966&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0038622966&partnerID=8YFLogxK
M3 - Article
VL - 86
SP - 795
EP - 799
JO - Journal of the American Ceramic Society
JF - Journal of the American Ceramic Society
SN - 0002-7820
IS - 5
ER -