STUDY OF CA2FE2-XNBXO5+X PHASES BY X-RAY-DIFFRACTION, IR AND EPR SPECTROSCOPY

被引：5

作者：

MORAES, IJ ^{[1
]}

TERRILE, MC ^{[1
]}

NASCIMENTO, OR ^{[1
]}

LI, MS ^{[1
]}

FRANCISCO, RHP ^{[1
]}

LECHAT, JR ^{[1
]}

机构：

[1] UNIV FED GOIAS,DEPT FIS,BR-74000 GOIANIA,GO,BRAZIL

来源：

MATERIALS RESEARCH BULLETIN | 1992年 / 27卷 / 04期

基金：

巴西圣保罗研究基金会;

关键词：

FERRITES; NIOBIUM; PEROVSKITES;

D O I：

10.1016/0025-5408(92)90031-T

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Samples of Ca2Fe2 - xNbxO5 + x with 0 less-than-or-equal-to x less-than-or-equal-to 1.00, were synthesized at different temperatures between 1000-degrees-C and 1300-degrees-C and studied by X-ray powder diffraction, IR and EPR spectroscopy. A pure orthorhombic phase was obtained for low Nb concentrations (0 less-than-or-equal-to x less-than-or-equal-to 0.20, thermally treated at 1000 - 1100-degrees-C), as shown by x-ray diffraction, while a cubic phase was obtained for 0.45 less-than-or-equal-to x less-than-or-equal-to 1.00, at T = 1300-degrees-C. A mixture of phases was observed in the other cases. The presence of the different phases was verified by IR and EPR measurements correlated with X-ray diffraction results. The Nb concentration strongly affected the structure, optical and magnetic properties of the ferrite.

引用

页码：523 / 529

页数：7

共 19 条

[1] MAGNETIC-PROPERTIES OF A BASALT GLASS AND GLASS-CERAMICS [J].