PREPARATION AND CHARACTERIZATION OF FULLY STOICHIOMETRIC SRCOO3 BY ELECTROCHEMICAL OXIDATION

被引：168
|
作者：
BEZDICKA, P
WATTIAUX, A
GRENIER, JC
POUCHARD, M
HAGENMULLER, P
机构：
[1] UNIV BORDEAUX 1, CNRS, CHIM SOLIDE LAB, 351 COURS LIBERAT, F-33405 TALENCE, FRANCE
[2] SAS, INST INORGAN CHEM, CS-84236 BRATISLAVA, CZECHOSLOVAKIA
来源：
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE | 1993年 / 619卷 / 01期
关键词：
STRONTIUM COBALTIATE(IV); SRCOO3; PREPARATION; CRYSTAL STRUCTURE; PHYSICAL PROPERTIES;
D O I：
10.1002/zaac.19936190104
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
A nearly stoichiometric SrCoO3 phase had been prepared up to now only using high oxygen pressure. A new method for preparing fully stoichiometric SrCoO3 has been proposed using electrochemical oxidation. Brownmillerite-type SrCoO2.50 is oxidized into a completely stoichiometric perovskite at a potential of 500 mV for 180 hours at room temperature in alkaline media (1 M KOH). The oxidized phase has a cubic unit cell (a = 383.5 pm). It is metallic and, at temperatures below T = 280 K, it shows ferromagnetic behavior. The magnetic moment at 0 K is 2.1 mu(B). The physical properties of SrCoO3.00 have been explained in terms of partial occupancy of a sigma*e(g)alpha band.
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页码：7 / 12
页数：6
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