THE HIGH-PRESSURE AND HIGH-TEMPERATURE SYNTHESIS OF HGBA2CACU2O6+DELTA AND HGBA2CA2CU3O(8+DELTA) SUPERCONDUCTORS AND THEIR CHARACTERIZATION

被引：10
|
作者：
SU, YJ [1 ]
YAO, YS [1 ]
CHE, GS [1 ]
JIA, SL [1 ]
DONG, C [1 ]
CAO, GH [1 ]
ZHAO, ZX [1 ]
机构：
[1] UNIV SCI & TECHNOL BEIJING,DEPT MAT PHYS,BEIJING 100083,PEOPLES R CHINA
来源：
SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 1995年 / 8卷 / 01期
关键词：
D O I：
10.1088/0953-2048/8/1/008
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The superconductors HgBa2CaCu2O6+delta (Hg-1212) and HgBa2Ca2Cu3O8+delta (Hg-1223) have been synthesized by solid state reaction, carried out at 850 degrees C under 25 kbar, using the nominal composition of HgBa2Ca2Cu3Ox. The results indicate that the optimum sintering time for the Hg-1223 phase is about 0.5 h. With increasing sintering time, the Hg-1223 phase decomposes, and the Hg-1212 phase increases gradually. When the sintering time increased to 3.8 h, we obtained a sample with nearly a single phase of Hg-1212. We synthesized the HgBa2CaCu2O6+delta superconductor under 27 kbar at various sintering temperatures using the nominal composition of HgBa2CaCu2Ox. The results indicate that the optimum sintering temperature for the Hg-1212 phase is 820-830 degrees C. The effect of annealing at various temperatures in flowing O-2 on the superconductivity of HgBa2Ca2Cu3O8+delta has been investigated.
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页码：48 / 52
页数：5
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