PROCESS FOR PRODUCING (BIPB)2SR2CA2CU3O10+X SUPERCONDUCTOR

摘要

This relates to modified citric acid method by adding tartaric acid, which can be applied to manufacturing high temp. superconductor. The modified method is characterized by :1)adding 0.3-0.5mol tartaric acid to citric acid solution against 1 mol of feeding copper salts; 2)keeping the equivalence of citric acid 1-2 against the total equivalence of feed metal nitrate. The superconductor is manufactured by 1)preparing mixed metal nitrate solution, 2)adding metal nitrate solution to citric acid/tartaric acid solution with stirring, 3)adding EDTA solution and controlling pH to 6-8, 4)drying it in vacuum to make gel, 5)heating this gel to prepare amorphous solid precursor, and 6)calcinating it.