PRECURSOR EFFECTS ON HGBA2CA2CU3O8 FORMATION UNDER HIGH-PRESSURE

被引：26

作者：

LIN, QM

HE, ZH

SUN, YY

GAO, L

XUE, YY

CHU, CW

机构：

[1] UNIV HOUSTON,DEPT PHYS,HOUSTON,TX 77204

[2] UNIV HOUSTON,TEXAS CTR SUPERCOND,HOUSTON,TX 77204

[3] ZHONGSHAN UNIV,DEPT PHYS,CANTON 510275,PEOPLES R CHINA

来源：

PHYSICA C | 1995年 / 254卷 / 3-4期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/0921-4534(95)00588-9

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The effects of the precursor on the synthesis of HgBa2Ca2Cu3O8+delta(Hg-1223) under high pressure are studied. It was observed that HgCaO2 and Hg-1212 appear in the early stage of the formation of Hg-1223. Through intercalation of Ba-Cu-O and Ca-Cu-O, HgCaO2 and Hg-1212 can be converted to Hg-1223. We found that the mixing level of Ca- and Cu-ions strongly affects the formation of Hg-1223. The existence of large CaO grains in the precursor will increase the needed synthesis temperature or synthesis time, and impurities may appear. A precursor in which Ca-ions are well reacted with other ions facilitates the formation of Hg-1223. We also found that this well-reacted precursor is insensitive to moist

引用

页码：207 / 212

页数：6

共 9 条

[1]

ANTPOVE EV, 1994, PHYSICA C, V235, P21

[2] HIGH-PRESSURE SYNTHESIS OF SINGLE-PHASE SUPERCONDUCTORS HGZSRXBA2-XCA2CU3O8+DELTA AND (HG,M)SR2CA2CU3OY WITH M=PB AND MO [J].