Phase relations in the system Y2O3–CaO–B2O3
2001; Elsevier BV; Volume: 327; Issue: 1-2 Linguagem: Inglês
10.1016/s0925-8388(01)01556-0
ISSN1873-4669
AutoresY. Zhang, X.L. Chen, J.K. Liang, Tian-Bing Xu, Yan Xu,
Tópico(s)Advanced Condensed Matter Physics
ResumoThe subsolidus phase relations of the system Y2O3–CaO–B2O3 are investigated by means of X-ray diffraction (XRD) analyses. There are six binary compounds and three ternary compounds in this system. The phase diagram comprises 13 three-phase regions. The ternary compound CaYBO4 is refined from powder XRD data by the Rietveld method. It has a warwickite-like structure with cell parameters a=10.4354(3) Å, b=9.6126(2) Å, c=3.5880(1) Å and space group Pnam. The rationality of the CaYBO4 structure is examined by Brown bond valence model and IR spectra.
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