TlBa2Ca2Cu3O9 (Tl-1223)超导体的临界温度高（125K），在强磁场环境下在ab面内和c轴方向上均具有较强的电流输运能力，是目前少数能够在液化天然气温区实现超导输电的材料之一，在弱电和强电领域中有着巨大的潜在应用价值。.本项目根据晶体生长理论及TBCCO粉体的差热分析实验结果，针对采用传统的低速升温烧结方法难以制备纯c轴取向Tl-1223超导薄膜的问题，提出了Tl-1223新的成相机理，并引入快速升温烧结工艺，分别在铝酸镧、Ni基合金或Cu基合金等衬底上制备出双轴织构的Tl-1223薄膜及其带材。通过项目研究，掌握采用射频磁控溅射方法和溶胶-凝胶方法制备TBCCO先驱膜的工艺、以及先驱膜后退火铊化过程中的快速升温烧结工艺，阐明Tl-1223的成相机理及其特殊的磁通钉扎机制。项目的研究方法可应用于Tl系其它相薄膜的制备，研究成果将促进Tl系超导材料在生产实践中的应用。

Owing to high critical temperature (125K) and strong current transport capacity in the direction of ab plane and c axis under the strong magnetic field, TlBa2Ca2Cu3O9 (Tl-1223) superconductor is one of the few materials which can be used to realize the superconducting transmission in the liquefied natural gas, and it has great potential application value in both of the strong and weak electric field. .To circumvent the problem that it is difficult to prepare pure c-axis oriented Tl-1223 superconducting films by the traditional slow heating sintering method, the project presented a new formation mechanism of Tl-1223 phase, and introduced rapid heating-up sintering technology for preparing biaxially textured Tl-1223 films on lanthanum aluminate substrates and Ni-based or Cu-based alloy tapes, which was based on the theory of crystal growth and differential thermal analysis of TBCCO Powders. Through the project research, we master the technology of preparing TBCCO precursor films by RF magnetron sputtering and sol-gel method, and the rapid heating-up sintering technology in the thalliation process. The research can clarify the new growth mechanism and special pinning mechanism of Tl-1223 films. The research method can be applied to the preparation of other Tl-based films, and its results will promote the practice application of Tl-based high temperature superconducting materials.