喷雾热解与共沉淀法制备高性能线材用Bi-2212粉末的中间相演变对比研究  

Comparison of Intermediate Phase Evolution in Bi-2212 Powders Prepared by Spray Pyrolysis and Co-precipitation Methods for High Performance Wires

作　　者：刘国庆[1] 金利华[1] 徐晓燕[1] 焦高峰[1] 郑会玲[1] 郝清滨[1] 崔利军[2] 于泽铭[1] 李成山[1] Liu Guoqing;Jin Lihua;Xu Xiaoyan;Jiao Gaofeng;Zheng Huiling;Hao Qingbin;Cui Lijun;Yu Zeming;Li Chengshan(Superconducting Materials Research Center,Northwest Institute for Nonferrous Metal Research,Xi'an 710016,China;Western Superconducting Technologies Co.,Ltd,Xi'an 710018,China)

机构地区：[1]西北有色金属研究院超导材料研究所,陕西西安710016 [2]西部超导材料科技股份有限公司,陕西西安710018

出　　处：《稀有金属材料与工程》2022年第1期92-97,共6页Rare Metal Materials and Engineering

基　　金：National Key R&D Program of China (2017YFB0902303, 2017YFE0301402);National Natural Science Foundation of China (51777172,51902267)。

摘　　要：采用喷雾热解和共沉淀工艺分别制备了Bi_(2)Sr_(2)CaCu_(2)O_(8+δ)(Bi-2212)前驱粉末,研究了Bi-2212前驱粉的中间相演化过程。与共沉淀工艺相比较,喷雾热解工艺提高了前驱粉末中Bi-2212晶粒的相转变效率;而且喷雾热解后粉末中残留的硝酸盐对Bi-2212晶粒的生长影响较小,共沉淀后粉末中残留碳酸盐会阻碍Bi-2212晶粒的形成。采用喷雾热解法制备的Bi-2212线材的性能与采用传统共沉淀工艺法制备的线材性能相近,但喷雾热解工艺的制备效率更高。因此,采用喷雾热解制备前驱粉末有助于实现Bi-2212线材的大规模生产。Bi_(2)Sr_(2)CaCu_(2)O_(8+δ)(Bi-2212) precursor powders were prepared by spray pyrolysis (SP) and co-precipitation (CP) processes separately.The intermediate phase evolution of Bi-2212 grains was investigated.Compared with that prepared by CP process,the phase formation rate of Bi-2212 grains prepared by SP process is obviously improved.Furthermore,the residual carbonates in CP powders hinder the formation of Bi-2212 grains,while the nitrates in SP powders only have a weak influence on the growth of Bi-2212 grains.The properties of Bi-2212 wires from SP precursor powder are close to those of the ones from CP precursor powder.Considering the much higher fabrication efficiency,SP process is useful for mass production of Bi-2212 wires.

关 键 词：BI-2212 前驱粉末合成 相形成 喷雾热解 

分 类 号：TB383.3[一般工业技术—材料科学与工程]