Bi-2212（Bi2Sr2CaCu2Ox）超导材料具有优异的高场临界电流特性，是面向高场磁体应用的理想超导材料之一。进一步提高其临界电流和改善力学性能是当前需要解决的两个主要问题。喷雾热分解方法制备的粉末可以有效提高线材临界电流，但相关机理研究尚属空白。本项目将基于喷雾热分解方法，系统研究预分解粉末的相演变规律及对非超导相的影响机制，获得合理的调控方法。另一方面，创新的采用3D打印技术在Bi-2212线材表面进行高强度材料镀化增强，外表面采用纯银进行电镀保护，并对该强化方式下线材热处理过程中的氧扩散动力学及超导相的形核再结晶动力学进行研究。本项目的开展将为探索满足未来高场磁体应用的具有理想超导性能和力学性能的Bi-2212超导线材提供科学依据。

Bi-2212（Bi2Sr2CaCu2Ox）superconductor has excellent high-field critical current characteristics, and is one of the ideal superconducting materials for high-field magnet applications. Further improving its critical current and improving mechanical properties are two major issues that need to be solved currently. The powder prepared by spray pyrolysis method can effectively improve critical current, but there is no report about corresponding mechanism research. In this project, Bi-2212 precursor powder will be prepared by spray pyrolysis method. Phase evolution of pre-decomposed powder and its influence mechanism on non-superconducting phase will be studied systematically to obtain a reasonable control method. What's more, high strength materials is cladded on Bi-2212 wire by the innovative 3D printing technology, and the outer surface is further protected by silver with electroplating method. Based on this strengthening method, the kinetics of oxygen diffusion and the kinetics of nucleation and recrystallization of superconducting phase will be studied. This work will possibility offer scientific basis for development of Bi-2212 wire with ideal superconducting and mechanical properties, which can satisfy the requirement of high-field magnet applications.