National Changhua University of Education Institutional Repository : Item 987654321/14192

English | 正體中文 | 简体中文 | Items with full text/Total items : 6507/11669
Visitors : 30056340 Online Users : 552

RC Version 3.2 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.

Scope Adv. Search

Login ‧ Upload ‧ Help ‧ About ‧ Administer

NCUEIR > College of Science > Department of Physics > Periodical Articles > Item 987654321/14192

Please use this identifier to cite or link to this item: http://ir.ncue.edu.tw/ir/handle/987654321/14192

Title:	A Novel Route to Phase Formation of Superconductive Cobalt Oxyhydrates Using KMnO4 as an Oxidizing Agent
Authors:	Liu, Chia-Jyi;Liao, C. Y.;Huang, L. C.;Su, C. H.;Neeleshwar, S.;Chen, Y. Y.;Liu, C. J. C.
Contributors:	物理學系
Date:	2004-11
Issue Date:	2012-09-10T06:14:25Z
Publisher:	Elsevier
Abstract:	We have first successfully synthesized the sodium cobalt oxyhydrate superconductors using KMnO4 as a de-intercalating and oxidizing agent. It is a novel route to form the superconductive phase of cobalt oxyhydrates without resort to the commonly used Br2/CH3CN solution. The role of KMnO4 is to de-intercalate the Na+ from the parent compound Na0.7CoO2 and oxidize the Co ion as a result. The higher molar ratio of KMnO4 relative to the sodium content tends to remove more Na+ from the parent compound and results in a slight expansion of the c-axis in the unit cell. The superconducting transition temperature is 4.6–3.8 K for samples treated by the aqueous KMnO4 solution with the molar ratio of KMnO4 relative to the sodium content in the range of 0.03 and 2.29.
Relation:	Physica C: Superconductivity, 416(1-2): 43-46
Appears in Collections:	[Department of Physics] Periodical Articles

Files in This Item:

File	Size	Format
index.html	0Kb	HTML	612	View/Open