The Stabilization of β-Bi2O3by CeO2

✍ Scribed by X.L. Chen; W. Eysel

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 213 KB
• Volume: 127
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.1996.0367

✦ Synopsis

phase mixtures, one of the phases always being CeO 2 . The The subsolidus phase relations of the binary system Bi 2 O 3 -crucible materials have no influence on reactions. Figure CeO 2 have been investigated. It was found that CeO 2 forms 1 shows the XRPD patterns for samples with x ϭ 0.08, 0.12, neither a compound nor a solid solution with Bi 2 O 3 . CeO 2 , and 0.15. The phase relations of the system Bi 2 O 3 -CeO 2 however, can stabilize ␤-Bi 2 O 3 over a wide composition range. obtained by quenching are shown in Fig. 2a. Three dif-The stabilization depends on the contents of CeO 2 as a second ferrent regions can be distinguished. Region I (0 Յ x Յ phase and on the heat treatment. A stabilization mechanism 0.08) contains Ͱ-Bi 2 O 3 and CeO 2 ; region II (0.8 Ͻ x Յ is proposed.