Effects of K2O Evaporation on the Structural Properties of KSbO3 Compounds
- Authors
- Park, Jongseong; Kim, Dae-Hyeon; Park, Su-Jin; Lee, Tae-Gon; Im, Mir; Kim, Jeong-Seog; Nahm, Sahn
- Issue Date
- 7월-2016
- Publisher
- WILEY
- Keywords
- structure; potassium/potassium compounds; evaporation
- Citation
- JOURNAL OF THE AMERICAN CERAMIC SOCIETY, v.99, no.7, pp.2229 - 2232
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF THE AMERICAN CERAMIC SOCIETY
- Volume
- 99
- Number
- 7
- Start Page
- 2229
- End Page
- 2232
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/88273
- DOI
- 10.1111/jace.14330
- ISSN
- 0002-7820
- Abstract
- A specimen having a stoichiometric composition of KSbO3 center dot(KSb) calcined at 800 degrees C has an R (3) over bar rhombohedral structure ( RS), and changes to a Pn (3) over bar cubic structure ( CS) when calcined at 1100 degrees C. Finally, a <111>-oriented rhombohedral phase is formed in the specimen calcined at 1230 degrees C. K/Sb ratio decreases from 1.0 in RS, 0.93 in CS, and finally to 0.85 in <111>-oriented rhombohedral phases. On the other hand, a specimen having a K-excess composition of K1.1SbO3 calcined at 800 degrees C shows a RS that is maintained in the K-excess specimen calcined at 1230 degrees C. The composition of these specimens is very close to KSb. Therefore, the RS with a space group of R (3) over bar is a stable form of KSbO3. The formation of Pn (3) over bar cubic and < 111>-oriented R (3) over bar phases can be explained by the evaporation of K2O during the calcination process at temperatures above 1100 degrees C.
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