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Rapid Method for the Preparation of 123 Superconductor Using Microwaves

 

作者: Krishna Gopa Kumara Warrier,   Hari Krishna Varma,   Themanam Veettil Mani,   Alathoor Damodaran Damodaran,  

 

期刊: Journal of the American Ceramic Society  （WILEY Available online 1992）
卷期: Volume 75, issue 7  

页码: 1990-1992

 

ISSN:0002-7820

 

年代: 1992

 

DOI:10.1111/j.1151-2916.1992.tb07231.x

 

出版商: Blackwell Publishing Ltd

 

关键词: superconductors;yttrium barium copper oxide (YBCO);microwaves;processing;electrical conductivity

 

数据来源: WILEY

 

摘要:

A novel and rapid method to prepare 123 superconductor powder based on microwave processing is reported. A mixture of the nitrates of Y, Ba, and Cu in 123 stoichiometry when subjected to microwaves of frequency 2.45 GHz for 240 s resulted in an appreciable quantity of tetragonal 123 phase. Annealing for a period of 4 h at 940°C in flowing oxygen formed a superconductor having aTcof 91 K. Sintered pellets of the powder formed by microwave processing have shown transportJcof 105 A/cm2

 

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