PHASE-RELATIONS OF LA2O3-CAO-CUO TERNARY-SYSTEM AND CA2+ SUBSTITUTIONFOR LA3+ IN LA2CUO4

Authors
ZHONG Q ZHANG YL CHEN XL RAO GH LIANG JK
Citation
Q. Zhong et al., PHASE-RELATIONS OF LA2O3-CAO-CUO TERNARY-SYSTEM AND CA2+ SUBSTITUTIONFOR LA3+ IN LA2CUO4, Journal of alloys and compounds, 210(1-2), 1994, pp. 261-265
Citations number
18
Categorie Soggetti
Chemistry Physical","Metallurgy & Mining","Material Science
Journal title
Journal of alloys and compounds → ACNP
ISSN journal
09258388
Volume
210
Issue
1-2
Year of publication
1994
Pages
261 - 265
Database
ISI
SICI code
0925-8388(1994)210:1-2<261:POLTAC>2.0.ZU;2-B
Abstract
The subsolidus phase relations of the system La2O3-CaO-CuO sintered at 980-degrees-C in air have been investigated by X-ray powder diffracti on (XRD). The system can be divided into seven three-phase regions and two extended two-phase regions. In this system there exist two binary compounds La2CuO4 and Ca2CuO3, two ternary compounds La2CaCu2O6 and L aCa2Cu5Oy and one solid solution La2-xCaCuO4-delta. The effects of Ca2 + substitution for La3+ on the superconductivity and crystal structure Of La2CUO4 have been investigated by XRD, differential thermal analys is, electrical and oxygen content measurements.