Polymerized complex synthesis and intergranular coupling of Bi-Pb-Sr-Ca-Cu-O superconductors characterized by complex magnetic susceptibility
Polymerized complex synthesis and intergranular coupling of Bi-Pb-Sr-Ca-Cu-O superconductors characterized by complex magnetic susceptibility
复制标题
复磁化率 Bi-Pb-Sr-Ca-Cu-O 超导体的聚合复合合成及晶间耦合
DOI：
10.1063/1.350858
复制
发表时间：
1992
影响因子：
3.2
通讯作者：
L. Börjesson
中科院分区：
文献类型：
--
作者：
M. Kakihana;M. Yoshimura;H. Mazaki;H. Yasuoka;L. Börjesson
采用聚合络合法合成了Bi 1.8Pb 0.2Sr2Ca2Cu3Oy、Bi 1.6Pb 0.4Sr2Ca2Cu3Oy和Bi 1.68Pb 0.32Sr1.75Ca1.82Cu2.83Oy三种组分的Bi-Pb-Sr-Ca-Cu-O超导陶瓷。聚合络合物方法包括三个重要的主要步骤：（1）形成均匀分散在乙二醇和水中的稳定的柠檬酸盐络合物，（2）通过乙二醇和金属-柠檬酸盐络合物之间的脱水（或酯化）形成的聚合络合物的制造，以及（3）聚合络合物前体的热解和随后的热处理以生产Bi-Pb-Sr-Ca-Cu-O超导体。与基于湿化学技术的其他更精细的制备过程相比，本技术提供了更方便和更容易的（Bi，Pb）2Sr 2Ca 2Cu 3 Oy超导体的制造，因为它消除了许多步骤，例如老化，过滤，洗涤和pH控制。“X射线清洁”（Bi，Pb）-2223超导体已经获得了所有三个comp.
Superconducting Bi‐Pb‐Sr‐Ca‐Cu‐O ceramics have been synthesized by the polymerized complex method at the Bi1.8Pb0.2Sr2Ca2Cu3Oy, Bi1.6Pb0.4Sr2Ca2Cu3Oy and Bi1.68Pb0.32Sr1.75Ca1.82Cu2.83Oy compositions. The polymerized complex method includes three important major steps: (1) formation of stable citrate complexes uniformly dispersed into ethyleneglycol and water, (2) fabrication of polymerized complexes which are formed through dehydration (or esterification) between ethyleneglycol and metal‐citrate complexes, and (3) pyrolysis of the polymerized complex precursor and the subsequent heat treatments for producing the Bi‐Pb‐Sr‐Ca‐Cu‐O superconductor. The present technique offers more convenient and easier fabrication of (Bi,Pb)2Sr2Ca2Cu3Oy superconductors compared with other more elaborate preparation procedures based on wet‐chemical techniques, as it eliminates many steps such as ageing, filtration, washing, and pH control. ‘‘X‐ray‐clean’’ (Bi,Pb)‐2223 superconductors have been obtained for all the three comp...