Material Specification for Y:123; [Y-Ba-Cu-O]
Process: Solid State Reaction
Notes: "The starting powder... was synthesized by a ceramic method using CuO, BaCO3, and Y2O3. YBa2Cu3O7-x powder was ground in a ball mill for 30 min and then pressed into tablets [plasticizer, 10% solution of poly(vinyl alcohol) in water; quantity of plasticizer, 10% of pressing powder mass; pressure, 3.5-4 ton cm-2]. The pressed pellets were sintered at 950 °C, 8 h, in air (step heating was used with isothermal annealing at 850 °C, 1 h)... The substrates were polished using diamond pastes until the average size of their imperfections was 0.2 µm... Thin films of CuO were deposited on the prepared substrates by magnetron sputtering (film thickness=0.5 µm). Film CuO was enriched with the isotope 63Cu up to 95% ('substrate copper' had the natural isotope ratio)."
Formula: YBa2Cu3O7-x
Informal Name: Y:123
Chemical Family: Y-Ba-Cu-O
Chemical Class: Oxide
Structure Type: Polycrystalline
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:
Diffusion Coefficient for Y:123; [Y-Ba-Cu-O]
| Diffusing Species () |
104/T (K-1) |
Temperature (K) |
Diffusion Coefficient (log10(cm2/s)) |
| Cu |
8.7 |
1150 |
-11.4 |
| Cu |
8.9 |
1120 |
-11.8 |
| Cu |
9.2 |
1080 |
-12.2 |
| Cu |
9.6 |
1040 |
-12.6 |
| Cu |
10.0 |
1000 |
-13.1 |
Measurement Method: Mass spectrometry
"Diffusion profiles were obtained by annealing (730-880 °C) the thin-film structures... in the selected atmosphere for no more than 30 min and analyzing by sputtered neutral mass spectrometry. Fick's second law for the case of contact of two semi-infinite bodies (error-function method) was used for the calculation of the effective diffusion coefficient of copper."
Cautions: Evaluated Data
Digitized data were obtained from Figure 2 of the paper.
