Back to Search
Start Over
Hydrothermal Syntheses and Structural Phase Transitions of AgNbO3.
- Source :
- Journal of the American Ceramic Society; Nov2012, Vol. 95 Issue 11, p3673-3677, 5p, 1 Black and White Photograph, 1 Chart, 5 Graphs
- Publication Year :
- 2012
-
Abstract
- The phase-pure AgNbO<subscript>3</subscript> has been prepared through the hydrothermal reactions of NH<subscript>4</subscript> HF<subscript>2</subscript>, Ag<subscript>2</subscript> O, and Nb<subscript>2</subscript> O<subscript>5</subscript>. The room-temperature powder X-ray diffraction analysis reveals that it crystallizes in orthorhombic perovskite lattice with a space group of Pmc2<subscript>1</subscript> and cell parameters a = 15.6999(9), b = 5.5521(1), and c = 5.5830(1) Å. The temperatures, pH values, and times play crucial roles in obtaining phase-pure silver niobate. The structural phase transitions were observed at 813 K from cubic to tetrahedral phase and to final orthorhombic phase at 718 K, confirmed by TGA- DTA. [ABSTRACT FROM AUTHOR]
- Subjects :
- CHEMICAL reactions
CHEMICAL synthesis
PHASE transitions
SILVER
PEROVSKITE
Subjects
Details
- Language :
- English
- ISSN :
- 00027820
- Volume :
- 95
- Issue :
- 11
- Database :
- Complementary Index
- Journal :
- Journal of the American Ceramic Society
- Publication Type :
- Academic Journal
- Accession number :
- 83148023
- Full Text :
- https://doi.org/10.1111/j.1551-2916.2012.05392.x