| 학회 |
한국공업화학회 |
| 학술대회 |
2011년 가을 (11/02 ~ 11/04, 경원대학교) |
| 권호 |
15권 2호 |
| 발표분야 |
나노 |
| 제목 |
Effects of Partial Substitution of Mg for Sr in SrFeO3-y Perovskite system |
| 초록 |
Perovskite type samples of the Sr1-χMgχFeO3-ysystem(x=0.0(SMF-0), 0.1(SMF-1), 0.2(SMF-2) and 0.3(SMF-3)) were synthesized in air at 1473K. All the samples were confirmed to have cubic symmetries(a=3.866Å for SMF-0(Sr1-χMgχFeO3-y )) and their lattice volumes decreased steadily from 57.8Å3 to 55.8Å3 with x values on account of both formation of oxygen deficiency and partial substitution of smaller ions(Mg) at Sr sites. The nonstoichiometric chemical formulas were determined by mohr salt titration. With x values the amounts of Fe4+(τ-Value) were decreased and the oxygen nonstoichiometry values(y) were increased. TG/DTA experiment showed that all the four samples started to lose their oxygen around 673-723K and showed almost reversible oxygen gaining when cooled to room temperature. |
| 저자 |
안윤지1, 이용준2, 이은석1
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| 소속 |
1청주대, 2충북대 |
| 키워드 |
perovskite; cubic symmetries; nonstoichiometric chemical formulas; TG/DTA; conductivity
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| E-Mail |
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