SUPERCONDUCTIVITY IN HGBA2CA2CU3O8+DELTA - SYNTHESIZED BY DIFFERENT METHODS

被引：12

作者：

BRYNTSE, I ^{[1
]}

KAREIVA, A ^{[1
]}

机构：

[1] VILNIUS UNIV,DEPT GEN & INORGAN CHEM,VILNIUS 2006,LITHUANIA

来源：

MATERIALS RESEARCH BULLETIN | 1995年 / 30卷 / 10期

关键词：

MERCURY; BARIUM; CALCIUM; COPPER;

D O I：

10.1016/0025-5408(95)00133-6

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The composition and superconducting properties of powder samples of Hg-1223, HgBa2Ca2Cu3O8+delta, were investigated. The specimens were prepared by a single-step method using individual metal oxides, and by a two-step method in which the precursor Ba2Ca2Cu3O7+delta was first synthesized by sol-gel method and then mixed with HgO. The final annealing was performed in sealed quartz ampoules at 665 degrees C or 860 degrees C, and the purity of the obtained samples was compared. After oxygen treatment at 300 degrees C for 6 h the samples showed superconductivity at a T-C(onset) of approximately 134 K, as determined from AC susceptibility measurements. The materials were also studied by X-ray powder diffraction and scanning and transmission electron microscopy.

引用

页码：1207 / 1216

页数：10

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