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The Improvement and Kinetics of SRS Process for Synthesis of Y1Ba2Cu3O7 and Related Superconductors
並列摘要
The Spontaneous Reaction Synthesis (SRS) of Y1Ba2Cu3O7 single phase superconductor, the quickest process ever known, from metals and peroxides with Y:Ba:Cu=1:2:3 chemical stoichiometric ratio has been reported in our previous paper [1].By extending the application of SRS process, a Y1237 superconductor dispersed with x (at %) Y2115 pinning centers can be synthesized by adjusting the stoichiometric ratio of Y:Ba:Cu=(1 + 2x):(2 + x):(3 + x). Following the texture alignment by Power- Melt-Growth (PMG) technique, the synthesized YBaCuO bulk superconductor exhibits an extra-ordinary levitation force, at least five-fold stronger than that of conventionally prepared ones.It is found that oxygen pressure in the reaction chamber during SRS process plays a dominant factor to control the rate of reaction and the completeness of phase transformation. Kinetics of SRS reaction for YiBa2Cu3O7 superconductors will be proposed in this report.
並列關鍵字
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