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Method for preparing superconducting thin film based on fluorine-free chemical solution oxygen pressure switching method
The invention provides a method for preparing a superconducting thin film based on a fluorine-free chemical solution oxygen pressure switching method. The method comprises the five steps of precursor solution preparation, coating, low-temperature pyrolysis treatment, high-temperature crystallization and oxidation. In the high-temperature crystallization process, BaCO3 is removed by using low oxygen pressure, then the low oxygen pressure is switched to high oxygen pressure, and the BaCO3 and CuO are promoted to react by using the change of the oxygen pressure to generate a transient liquid phase, so that the growth of YBCO is assisted, and the growth rate is increased. According to the superconducting thin film prepared by the method, rapid epitaxial growth of the YBCO thin film on the metal substrate is successfully realized by using an oxygen pressure switching method, and the highest growth rate can reach 1800nm/min, which is far beyond that of a conventional FF-MOD method. By adopting the preparation method disclosed by the invention, the YBCO superconducting thin film with relatively high critical current density can be obtained, and the YBCO superconducting thin film is used for preparing a second-generation high-temperature superconducting strip by a metal organic matter deposition method.
本发明提供了一种基于无氟化学溶液氧压切换法制备超导薄膜的方法，包括前驱液制备、涂覆、低温热解处理、高温晶化和氧化五个步骤。在高温晶化过程中先利用低氧压去除BaCO3，再切换为高氧压，利用氧压的变化来促使BaCO3与CuO反应，产生瞬态液相，从而辅助YBCO生长，提高生长速率。本发明制备的超导薄膜，利用氧压切换法成功实现了金属基底上YBCO薄膜的快速外延生长，生长速率最高可达1800nm/min，远超常规FF‑MOD方法。采用本发明的制备方法，能得到具有较高临界电流密度的YBCO超导薄膜，用于金属有机物沉积法制备第二代高温超导带材。
Method for preparing superconducting thin film based on fluorine-free chemical solution oxygen pressure switching method
The invention provides a method for preparing a superconducting thin film based on a fluorine-free chemical solution oxygen pressure switching method. The method comprises the five steps of precursor solution preparation, coating, low-temperature pyrolysis treatment, high-temperature crystallization and oxidation. In the high-temperature crystallization process, BaCO3 is removed by using low oxygen pressure, then the low oxygen pressure is switched to high oxygen pressure, and the BaCO3 and CuO are promoted to react by using the change of the oxygen pressure to generate a transient liquid phase, so that the growth of YBCO is assisted, and the growth rate is increased. According to the superconducting thin film prepared by the method, rapid epitaxial growth of the YBCO thin film on the metal substrate is successfully realized by using an oxygen pressure switching method, and the highest growth rate can reach 1800nm/min, which is far beyond that of a conventional FF-MOD method. By adopting the preparation method disclosed by the invention, the YBCO superconducting thin film with relatively high critical current density can be obtained, and the YBCO superconducting thin film is used for preparing a second-generation high-temperature superconducting strip by a metal organic matter deposition method.
本发明提供了一种基于无氟化学溶液氧压切换法制备超导薄膜的方法，包括前驱液制备、涂覆、低温热解处理、高温晶化和氧化五个步骤。在高温晶化过程中先利用低氧压去除BaCO3，再切换为高氧压，利用氧压的变化来促使BaCO3与CuO反应，产生瞬态液相，从而辅助YBCO生长，提高生长速率。本发明制备的超导薄膜，利用氧压切换法成功实现了金属基底上YBCO薄膜的快速外延生长，生长速率最高可达1800nm/min，远超常规FF‑MOD方法。采用本发明的制备方法，能得到具有较高临界电流密度的YBCO超导薄膜，用于金属有机物沉积法制备第二代高温超导带材。
Method for preparing superconducting thin film based on fluorine-free chemical solution oxygen pressure switching method
一种基于无氟化学溶液氧压切换法制备超导薄膜的方法
LI MINJUAN (author) / CAI CHUANBING (author) / LIU ZHIYONG (author) / ZHOU XINGHANG (author)
2023-07-25
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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