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Coprecipitation Synthesis of a Superconductor via Multi‐Precipitants
Author(s) -
Chen YungFang,
Sheen ShyangRoeng
Publication year - 2000
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.200000040
Subject(s) - coprecipitation , chemistry , calcination , oxalate , hydroxide , precipitation , superconductivity , ion , inorganic chemistry , nuclear chemistry , catalysis , organic chemistry , condensed matter physics , meteorology , physics
A precipitation process has been developed to prepare precursor powders, which can be calcined and sintered to form high‐Tc superconductors such as YBa 2 Cu 3 O y . Precursor powders are prepared using a mixed‐precipitants system in which a solution contains precipitating anions such as hydroxide, oxinate and oxalate ions. A theoretical study on the conditions of mixed‐precipitants coprecipitation is performed. The solution pH of complete precipitation of the title system is extended and is maintained between 4.46 and 12.0. A series of experiments were conducted to confirm the as‐derived optimal condition. Finally, characterization of the properties of the YBa 2 Cu 3 O y obtained after high temperature treatment is reported.