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Sr<sub>1-x</sub>Ba<sub>x</sub>Nb<sub>2</sub>O<sub>6</sub>의 유전 특성에 대한 산화/환원 열처리의 영향
강봉훈,백영섭,주기태,Kang, Bong-Hoon,Paek, Young-Sop,Joo, Gi-Tae 한국세라믹학회 2006 한국세라믹학회지 Vol.43 No.3
${Sr_{1-x}Ba_xNb_2O_6$(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.
Sr1-xBaxNb2O6의 유전 특성에 대한 산화/환원 열처리의 영향
강봉훈,주기태,백영섭 한국세라믹학회 2006 한국세라믹학회지 Vol.43 No.3
Sr1-xBaxNb2O6(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℃ for 4hr, Curie temperature is changed by colorless change of black SBN. The reason seems to be Nb5+ oxidation of some Nb4+ 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.