Author:
Wannasut P,Yawirach S,Boonsong P,Watcharapasorn A
Abstract
AbstractWe have studied the effect of annealing temperature on oxygen content and thermoelectric properties of YBa2Cu3O7-x(YBCO) ceramics fabricated by hot-pressing method. The as-calcined powder was subjected to the applied pressure of 70 MPa at 800 °C for 1 h under Ar atmosphere. The YBCO ceramics were then annealed at 700 and 750 °C for 4 h in oxygen atmosphere. The XRD results showed that all samples possessed pure orthorhombic YBCO phase. The annealing process seemed to induce the reduction of the electrical conductivity and metallic-to-semiconducting transition when the annealing temperature was increased. The temperature dependence ofZTshowed a close relation to that of electrical conductivity, suggesting the dominant role of the charged carriers present in these samples.
Subject
Computer Science Applications,History,Education
Cited by
1 articles.
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1. Research on Soldering Technology of YBCO Splice Joint;IEEE Transactions on Applied Superconductivity;2023-11