Material Specification for Y:123; [Y-Ba-Cu-O]
Process: Solid State Reaction
Notes: "The superconducting 1-2-3 powder used in the partial melt process was prepared by the solid-state reaction method using Y2O3 (99.9%), BaCO3 (99%), and CuO (99.9%) powders. The 1-2-3 powders were well mixed in an alumina mortar with a pestle, calcined at 930 °C for 24 h in air, then furnace cooled. The calcined cakes were crushed, mixed with CeO2 powders of 99.5% purity up to 5 wt.%, pressed isostatically into pellets, and then sintered at 950 °C for 24 h in air... The pellets were rapidly heated to 1050 °C, held for 0.5 h, cooled to 1000 °C at a rate of 50 °C/h, cooled again to 980 °C at 3° C/h, and then held for 10 h. For the transformation of the tetragonal phase to the orthorhombic one, the pellets were cooled slowly down to 450 °C, held for 24 h, and then air-cooled."
Formula: YBa2Cu3O7•xCeO2
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:
Critical Temperature for Y:123; [Y-Ba-Cu-O]
| Critical Temperature (K) |
| 91 ± 1 |
Measurement Method: Four-probe method
Cautions: Unevaluated Data
"The zero resistance temperature T
c of the partially melted sample was not influenced by the CeO
2 addition....The T
c is nearly constant regardless of CeO
2 content." No measurement details were noted.
Hardness for Y:123; [Y-Ba-Cu-O]
| Applied Load (g) |
Mass Fraction of CeO2 (%) |
Hardness (GPa) |
| 25 |
0 |
7.87 |
| 25 |
1 |
9.37 |
| 25 |
2 |
9.86 |
| 25 |
3 |
10.40 |
| 25 |
4 |
10.69 |
| 25 |
5 |
10.78 |
| 50 |
0 |
7.62 |
| 50 |
1 |
7.96 |
| 50 |
2 |
8.05 |
| 50 |
3 |
8.04 |
| 50 |
4 |
8.38 |
| 50 |
5 |
8.52 |
| 100 |
0 |
6.78 |
| 100 |
1 |
7.58 |
| 100 |
2 |
7.67 |
| 100 |
3 |
7.71 |
| 100 |
4 |
7.81 |
| 100 |
5 |
7.85 |
| 150 |
0 |
6.32 |
| 150 |
1 |
6.62 |
| 150 |
2 |
6.86 |
| 150 |
3 |
6.90 |
| 150 |
4 |
6.95 |
| 150 |
5 |
7.29 |
| 200 |
0 |
6.21 |
| 200 |
1 |
6.50 |
| 200 |
2 |
6.54 |
| 200 |
3 |
6.58 |
| 200 |
4 |
6.77 |
| 200 |
5 |
6.86 |
Measurement Method: Vickers hardness
"Vickers hardness test was carried out for the samples mounted by epoxy resin. Indentations were made on the polished surface for peak-load contact time of 5 s at load from 10 g to 200 g."
Cautions: Evaluated Data
Digitized data were obtained from Figure 5 of the paper.
