Effect of KClO3 addition on the physical properties of YBCOHTSC

The influence of KClO3 addition on the AC complex susceptibility and parame ters of microstructure and morphology of YBCO HTSC with nominal composition s Y1Ba(2-x)KxCu3Oy, Y(1-0.2x)Ba(2-0.2x)KxCu3Oy and Y1Ba2Cu(3.5-x)KxOy. (x = 0 - 0.75) were investigated. Experimental results showed a promoting effec t of the addition on the formation of 123-phase in air. The superconducting transition temperature for all KClO3-doped samples was found to be higher (T-c,T-onset similar to 94 K) than that for undoped YBCO. The comparison of the properties of YBCKO demonstrated that the additive had a specific effe ct on the magnetic susceptibility and microstructure of samples with differ ent nominal compositions. (C) 2000 Elsevier Science B.V. All rights reserve d.