THERMOSTABILITY AND DECOMPOSITION OF THE (BI,PB)2SR2CA2CU3O10 PHASE IN SILVER-CLAD TAPES

被引：45

作者：

LUO, JS ^{[1
]}

MERCHANT, N ^{[1
]}

MARONI, VA ^{[1
]}

GRUEN, DM ^{[1
]}

TANI, BS ^{[1
]}

CARTER, WL ^{[1
]}

RILEY, GN ^{[1
]}

SANDHAGE, KH ^{[1
]}

机构：

[1] AMER SUPERCONDUCTOR CORP,WATERTOWN,MA 02172

来源：

JOURNAL OF APPLIED PHYSICS | 1992年 / 72卷 / 06期

关键词：

D O I：

10.1063/1.351581

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The stability of the Bi2-xPbxSr2Ca2Cu3O10 (Pb-2223) phase contained in silver-sheathed oxide-powder-in-tube specimens has been investigated by x-ray diffraction, transmission electron microscopy, and energy dispersive x-ray analysis. Silver tubes loaded with Pb-2223 precursor powders were processed into tapes using established metallurgical techniques. The tapes were heat-treated in a specially designed equilibration apparatus at selected temperatures (800-845-degrees-C) for a range of times (10-5500 min) and quenched in liquid gallium held at approximately 40-degrees-C. The results showed that the Pb-2223 phase is stable in a limited temperature interval between 810 and 830-degrees-C in 7.5% oxygen. At 800-degrees-C, this phase decomposes to Bi2Sr2CaCu2O8 (2212), Ca2PbO4, and CuO; while at temperatures greater-than-or-equal-to 840-degrees-C it partially melts with precipitation of Bi2Sr2CuO6 (2201) and Ca2CuO3. The effects of the silver cladding on the Pb-2223 phase stability and microstructure are also discussed.

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页码：2385 / 2389

页数：5

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