摘要
采用高温X射线和DTA技术研究了三步反应法合成Bi-Pb-Sr-Ca-Cu-O超导体的反应过程。实验结果表明样品在740℃能形成2212相,在825℃形成2223相.2212相在875℃左右异分熔化成2201相和液相,2223相在935℃左右同分熔化。2212相在晶化过程中容易形成强的e轴取向。
The reaction process of formation of the Bi-Pb-Sr-Ca-Cu-O superconductor by means of a three-step reaction method was studied by high-temperature X-ray diffraction meansurement and DTA technique. The 2212 phase began to form at about 740℃ from the mixture of the Bi-Pb-Sr-Ca-O precursor-CuO, and the 2223 phase at about 825℃. The 2212 phase melted incongruently to the 2201 phase and a liquid phase at about 875℃ and the 2223 phase melted a liquid phase at about 935℃. In the crystallization of the 2212 phase, strong c-orientation forms easily.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
1991年第1期122-126,共5页
Acta Physica Sinica
基金
国家超导技术联合研究开发中心的资助
