A wet-chemical method for the synthesis of In-doped CaZrO3 ceramic powders

Citation
J. Le et al., A wet-chemical method for the synthesis of In-doped CaZrO3 ceramic powders, J EUR CERAM, 19(15), 1999, pp. 2589-2591
Citations number
10
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
ISSN journal
09552219 → ACNP
Volume
19
Issue
15
Year of publication
1999
Pages
2589 - 2591
Database
ISI
SICI code
0955-2219(199911)19:15<2589:AWMFTS>2.0.ZU;2-E
Abstract
Both CaZr0.9In0.1O3-alpha ceramics and ceramic nanopowders are synthesized starting from a co-precipate formed using a wet-chemical co-precipitation m ethod. The XRD-results confirm that CaZrO3 and CaIn2O4 phases exist after t he co-precipitates are calcined at 1273 K for 3 h in air. The CaIn2O4 phase disappears after calcining the powder twice at 1823 K for 10 h in air with the formation of the CaZr0.9In0.1 O3-alpha phase. The XRD pattern of the c eramic powders is the same as that of sintered CaZr0.9In0.1O3-alpha ceramic s (1823 K for 10 h in air). Scanning electron microscopy shows that the cer amic powders calcined at 1273 Kfor 3 h are nano-sized powders. After sinter ing at 1823 K for 10 h, the grain-size increases dramantically. EDX results indicate that the Ca:Zr: In; ratio in the co-precipitates is close to the theoretical value. The ratio of Ca:In decreases with increasing calcining o r sintering temperature. (C) 1999 Published by Elsevier Science Limited. Al l rights reserved.