摘要
The precursor of Bi Pb Sr Ca Cu O superconductor was prepared by spray drying nitrate solution with nominal composition of Bi∶Pb∶Sr∶Ca∶Cu=1.84∶0.34∶1.91∶2.03∶3.06. Instrumentation of XRD、 DTA、 DTA TG、 FT IR and SEM was used for the evaluation of the influences of calcination and fine grinding on the synthesis of sperconducting materials with “high T c phase”. The experimental results indicated that the fine grinding with organic additives influenced the formation and the transition of the superconducting phase. The phase transition of the superconductor can be reduced greatly by means of high temperature grinding.
The precursor of Bi Pb Sr Ca Cu O superconductor was prepared by spray drying nitrate solution with nominal composition of Bi∶Pb∶Sr∶Ca∶Cu=1.84∶0.34∶1.91∶2.03∶3.06. Instrumentation of XRD、 DTA、 DTA TG、 FT IR and SEM was used for the evaluation of the influences of calcination and fine grinding on the synthesis of sperconducting materials with “high T c phase”. The experimental results indicated that the fine grinding with organic additives influenced the formation and the transition of the superconducting phase. The phase transition of the superconductor can be reduced greatly by means of high temperature grinding.
