Hydration phase diagram for sodium cobalt oxide Na0.3CoO2•γH2O

被引：13

作者：

Foo, ML

Klimczuk, T ^{[1
]}

Cava, RJ

机构：

[1] Princeton Univ, Dept Chem, Princeton, NJ 08544 USA

[2] Princeton Inst Res Sci & Technol Mat, Princeton, NJ 08544 USA

[3] Gdansk Tech Univ, Fac Appl Phys & Math, PL-80952 Gdansk, Poland

来源：

MATERIALS RESEARCH BULLETIN | 2005年 / 40卷 / 04期

关键词：

superconductivity; layer compounds; oxides; X-ray diffraction;

D O I：

10.1016/j.materresbull.2005.01.001

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The hydration phase diagram for sodium cobalt oxhydrate, Na(0.3)CoO(2)(.)yH(2)O (y = 0, 0.6 and 1.3), was determined as a function of relative humidity at 298 K It is found that greater than 75% relative humidity is needed for complete hydration of anhydrous Na0.3CoO2 to the superconducting phase Na(0.3)CoO(2)(.)1.3H(2)O. Dehydration studies show that a minimum of 43% relative humidity is needed to maintain the stability of the fully hydrated superconducting phase. The intermediate hydrate, Na(0.3)CoO(2)(.)0.6H(2)O, is stable between 10 and 50% relative humidity on hydration, and 35 and 0% relative humidity on dehydration. (c) 2005 Elsevier Ltd. All rights reserved.

引用

页码：665 / 670

页数：6

共 14 条

[1]

[Anonymous], 1968, CLAY MINER

[2] Chemical instability of the cobalt oxyhydrate superconductor under ambient conditions [J].