Abstract
Because of the mixed metal valance state of thallium in a Tl-based superconductor, a nearly single ‘‘1223’’ phase can be readily prepared by a modified Pechini method (US Patent 3 330 697). Tl2O3 and other metal nitrates are dissolved in an aqueous solution plus a certain amount of oxalic acid for chelating the metal cations. The desired phase shows zero resistance at 114 K and the phase purity is identified by x-ray diffraction. Characteristics of superconductivity also are evidenced by the Meissner effect. The preparation technique is considered valuable to purify multiphase superconductors for mass production.
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Dates
Type | When |
---|---|
Created | 23 years, 1 month ago (July 26, 2002, 9:31 a.m.) |
Deposited | 1 year, 6 months ago (Feb. 2, 2024, 9:25 p.m.) |
Indexed | 1 year, 6 months ago (Feb. 2, 2024, 9:43 p.m.) |
Issued | 34 years, 3 months ago (May 27, 1991) |
Published | 34 years, 3 months ago (May 27, 1991) |
Published Print | 34 years, 3 months ago (May 27, 1991) |
@article{Chiang_1991, title={Preparation of high-purity Tl-based ‘“1223”’ superconductor phase by modified Pechini process in water solution}, volume={58}, ISSN={1077-3118}, url={http://dx.doi.org/10.1063/1.104865}, DOI={10.1063/1.104865}, number={21}, journal={Applied Physics Letters}, publisher={AIP Publishing}, author={Chiang, Cyril and Shei, C. Y. and Wu, S. F. and Huang, Y. T.}, year={1991}, month=may, pages={2435–2437} }