PREPARATION OF HIGH-PURITY 110-K PHASE IN THE BI(PB)-SR-CA-CU-O SUPERCONDUCTOR USING THE MODIFIED CITRATE PROCESS

被引：39

作者：

SUN, YK

LEE, WY

机构：

[1] Department of Chemical Engineering, Seoul National University, Seoul, 151-742, Shinlim-dong San 56-1, Kwanak-Ku

来源：

PHYSICA C | 1993年 / 212卷 / 1-2期

关键词：

D O I：

10.1016/0921-4534(93)90483-7

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The superconducting Bi(Pb)-Sr-Ca-Cu-O system, with the high-T(c) phase, was prepared by the modified citrate process using an aqueous solution of metal nitrate containing citric acid and tartaric acid. It was found that transparent sots were obtained from the solution of initial pH of 7.6-9 and a molar ratio of C4H6O6/Cu of 0.45 to 1. The mechanisms of forming the low-T(c) phase as well as the high-T(c) phase were confirmed by FT-IR spectroscopy, X-rav diffraction and scanning electron microscopy. The modified citrate process produced much more high-T(c) phase than the citrate process when the sintering conditions were identical and its transition temperature, 108 K, was much higher.

引用

页码：37 / 42

页数：6

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