SUPERCONDUCTIVITY OF RICH-Ca,Cu Bi(Pb)-Sr- Ca-Cu-O SYSTEM

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Abstract
The superconductors with nominal composition of Bi2.0-xPbxSr1.9Ca2.2Cu3.3Oy were prepared by solid-state reaction method, XRD patterns were systematically studied for the samples. The results indicated that rich-Ca, Cu could accelerate the formation of (2223) phase, and broaden the sintering temperature range for a single phase. High-quality polycrystalline sample of 110K single phase was obtained. Annealing at lower temperature is beneficial to increase the volume ratio of 110K phase.
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LU YA-FENG³,

WU XIAO-ZU²,

LI QING-YUN²,

ZHOU LIAN²,

XIN MIAN-RONG¹,

LUO CHANG-XUN¹

(1)陕西师范大学物理系,西安710062; (2)西北有色金属研究院,宝鸡721014; (3)西北有色金属研究院,宝鸡721014;陕西师范大学物理系,西安710062
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