Abstract
A method for the preparation of high Tc superconductor (HTSC) Bi 2CaSr 2Cu 2O 8 + δ involving three steps has been adopted. Firstly two compositions namely Bi 2O 3 + CaO and SrCO 3 + CuO were prepared, these were then mixed in the molar ratio 1:2. Short duration heat treatment at temperature approaching melting stage, which here was well above 900°C due to pre-conversion of Bi 2O 3 into CaBi 2O 4, resulted in formation of material rich in the desired phase. Characterisation of samples by XRD, EMPA, electrical and magnetic methods has been done.
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