Bi-2223喷雾热分解粉末热处理工艺优化

Bi-2223带材目前在电流引线、超导电机、超导电缆、超导限流器等领域实现了许多示范性应用，载流性能是表征其性能的重要指标，而高质量的前驱体粉末是最终带材性能的关键保障.本文选用具有工艺简单、粉末效率高、批次稳定性好等优点的喷雾热分解法制备的Bi-2223前驱体粉末，利用TG-DSC、XRD、SEM等测试手段对低氧条件下不同保温时间烧结的粉末进行分析，并结合最终带材的载流性能测试结果，获得了最优粉末烧结参数，为后续喷雾热分解粉末的进一步生成Bi-2223相以及高性能粉末的制备提供了依据.

Optimization of Heat Treatment ProcessforBi-2223 Spray Pyrolysis Powders

Bi-2223 tapes have currently achieved many exemplary applications in the fields of current leads? superconducting motors, superconducting cables and superconducting current limiters. The current-carrying performance is an important indicator to characterize its performance, the high-quality precursor powder is the key guarantee for the final performance. In this paper, the Bi-2223 precursor powder prepared by spray pyrolysis method, which has the advantages of simple process, high powder efficiency and good batch stability. The powder was analyzed by TG-DSC, XRD and SEM, and combined with the current-carrying performance test results of the final tapes, the optimal powder sintering parameters were obtained, providing the basis the further generation of Bi- 2223 phase and the preparation of high-performance powders for subsequent spray pyrolysis powders.