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http://dx.doi.org/10.4191/KCERS.2006.43.3.173

Oxidation/Reduction Effect on Dielectric Properties of Sr1-xBaxNb2O6  

Kang, Bong-Hoon (Multifunctional Ceramics Research Center, Korea Institute of Science and Technology, Department of Physics, Sogang University, Department of Visual Optics, Far East University)
Paek, Young-Sop (Pilkor Electronics Co. Ltd.)
Joo, Gi-Tae (Multifunctional Ceramics Research Center, Korea Institute of Science and Technology)
Publication Information
Journal of the Korean Ceramic Society / v.43, no.3, 2006 , pp. 173-176 More about this Journal
Abstract
${Sr_{1-x}Ba_xNb_2O_6$(SBN) have been obtained in Pt crucible by melting and cooling in air atmosphere. Some SBNs being at the bottom of the crucible are black and transparent, and the other SBNs colorless. The black SBN became to be colorless by oxidation heat treatment $1,300^{\circ}C$ for 4 h, Curie temperature is changed by colorless change of black SBN. The reason seems to be $Nb^{5+}$ oxidation of some $Nb^{4+}$ ions in SBN or effect of unknown impurities. Diffused Phase Transition (DPT) was appeared during heating and cooling process. Various sintered SBN ceramics specimen showed relaxor characteristics.
Keywords
Strontium Barium Niobate (SBN); Oxidation/Reduction; Dielectric properties; Diffused Phase Transition (DPT);
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