Production method for controlling yttrium-barium-copper-oxygen superconducting thick film in-plane oriented growth in oxygen ambient
A technology of yttrium barium copper oxide and orientation growth, which is applied in the directions of single crystal growth, crystal growth, single crystal growth, etc., can solve problems such as few experimental data, and achieve low cost, simple process, good epitaxial orientation and crystal quality Effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0017] Using the YBCO thin film with eight-fold symmetry as the seed film, the YBCO superconducting thick film with pure 45° in-plane orientation is grown by liquid phase epitaxy (the growth temperature is lower than the peritectic melting temperature 10K)
[0018] 1) with BaCO 3 +CuO powder is mixed, and the Ba / Cu atomic ratio is controlled to be 0.5;
[0019] 2) to BaCO 3 +CuO powder is ground, then calcined at 850°C for 48 hours, and sintered into a uniform Ba-Cu-O powder;
[0020] 3) Add Ba-Cu-O powder to Y placed in the furnace 2 o 3 In the crucible, heat the furnace to 40K above the peritectic melting temperature of YBCO, and keep it warm for 35 hours to melt the Ba-Cu-O powder evenly to obtain a Y-Ba-Cu-O melt;
[0021] 4) Change the atmosphere in the furnace to a 100% pure oxygen atmosphere, and keep the furnace airtight and the airflow stable;
[0022] 5) cooling the Y-Ba-Cu-O melt to 10K below the peritectic melting temperature of YBCO as the epitaxial growth te...
Embodiment 2
[0025] Using the YBCO thin film with eight-fold symmetry as the seed film, the YBCO superconducting thick film with pure 45° in-plane orientation is grown by liquid phase epitaxy (the growth temperature is 20K lower than the peritectic melting temperature)
[0026] 1) with BaCO 3 +CuO powder is mixed, and the Ba / Cu atomic ratio is controlled to be 0.6;
[0027] 2) to BaCO 3 +CuO powder is ground, then calcined at 900°C for 44 hours, and sintered into a uniform Ba-Cu-O powder;
[0028] 3) Add Ba-Cu-O powder to Y placed in the furnace 2 o3 In the crucible, heat the furnace to 35K above the peritectic melting temperature of YBCO, and keep it warm for 40 hours to melt the Ba-Cu-O powder evenly to obtain a Y-Ba-Cu-O melt;
[0029] 4) Change the atmosphere in the furnace to a 100% pure oxygen atmosphere, and keep the furnace airtight and the airflow stable;
[0030] 5) cooling the Y-Ba-Cu-O melt to 20K below the peritectic melting temperature of YBCO, as the epitaxial growth tem...
Embodiment 3
[0033] Using the YBCO thin film with eight-fold symmetry as the seed film, the YBCO superconducting thick film with pure 45° in-plane orientation is grown by liquid phase epitaxy (the growth temperature is 30K lower than the peritectic melting temperature)
[0034] 1) with BaCO 3 +CuO powder is mixed, and the Ba / Cu atomic ratio is controlled to be 0.7;
[0035] 2) to BaCO 3 +CuO powder is ground, then calcined at 950°C for 40 hours, and sintered into a uniform Ba-Cu-O powder;
[0036] 3) Add Ba-Cu-O powder to Y placed in the furnace 2 o 3 In the crucible, heat the furnace to 30K above the peritectic melting temperature of YBCO, and keep it warm for 45 hours to melt the Ba-Cu-O powder evenly to obtain a Y-Ba-Cu-O melt;
[0037] 4) Change the atmosphere in the furnace to a 100% pure oxygen atmosphere, and keep the furnace airtight and the airflow stable;
[0038] 5) cooling the Y-Ba-Cu-O melt to 30K below the peritectic melting temperature of YBCO, as the epitaxial growth t...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More