Powder processing of high temperature ceramic superconductor Tl2Ba2Ca2Cu3O10 |
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| Authors: | Y Xin B R Xu W S He G F Sun R Farr D F Lu K W Wong D Knapp |
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| Affiliation: | (1) Midwest Superconductivity, Inc., 1315 Wakarusa Dr., 66049 Lawrence, KS;(2) Department of Physics and Astronomy, University of Kansas, 66045 Lawrence, KS;(3) Department of Geology, University of Kansas, 66045 Lawrence, KS |
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| Abstract: | We have developed a technique to produce high quality Tl2Ba2Ca2Cu3O10 powders used for making superconducting wire, tape, lead, shield, and other large scale bulk applications. Starting with
T12O3, BaO2, CaO, and CuO, we mix and grind these chemicals with a machine ball mill and then press the ground mixture into pellets.
The pellets are sintered at about 895‡C for at least 30 h in an oxygen atmosphere. The sintered material is mainly the Tl2Ba2Ca2Cu3O10 compound. To get more homogeneous superconductor powders, we pulverize the sintered material and use a magnetic superconducting
material selector to separate and grade the material. Finally, the top grade material has a phase purity of <98% and a Tc(r < 0) of 123–126K. |
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| Keywords: | Magnetic separation phase purity synthesis superconductor Tl2Ba2Ca2Cu3O10 |
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