Material Specification for Y:123; [Y-Ba-Cu-O:Ag]
Process: Solid State Reaction
Notes: "The samples... are manufactured using high purity Y2O3 (99.99% pure), BaCO3 and CuO (99.9% pure) powders, which are thoroughly mixed and ground in mortar and pestle, and calcined at 900 °C in air for 24 h. After furnace cooling, the mixed powder is reground and subjected to a second calcination at 920 °C for 24 h. The resultant 1-2-3 powder is ball milled until the powder is less than 250 mesh. This powder is then thoroughly mixed with 5, 15, and 25 wt.% Ag (99.9% pure, 2.5-8 µm), and pressed into bars of dimension 50x12x8 mm3 under an uniaxial pressure of 150 MPa. The green composites are then sintered at 925 °C in air for 24 h and cooled to room temperature at a rate of 30 °C/h... The sintered composites are vertically introduced into a box furnace and heated rapidly to 1020 °C-1075 °C in air depending on the Ag content. After a 15 min hold at these high temperatures, the composites are rapidly cooled a temperature between 970 °C-1000 °C dependent on the amount of Ag added. The specimens are slowly cooled at a rate of 1-2 °C/h down to 900 °C... The composites are then cooled at a rate of 30 °C/h down to room temperature with 12 h holds at 500 °C and 400 °C for oxygen uptake."
Formula: YBa2Cu3Ox/yAg
Informal Name: Y:123
Chemical Family: Y-Ba-Cu-O:Ag
Chemical Class: Oxide
Structure Type:
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:
Critical Current Density for Y:123; [Y-Ba-Cu-O:Ag]
| Mass Fraction of Ag (%) |
Magnetic Field (T) |
Critical Current Density (kA/cm2) |
| 5 |
0.0 |
78.6 |
| 5 |
0.5 |
21.0 |
| 5 |
1.0 |
18.2 |
| 5 |
1.5 |
14.2 |
| 15 |
0.0 |
86.0 |
| 15 |
0.5 |
28.0 |
| 15 |
1.0 |
20.2 |
| 15 |
1.5 |
18.5 |
| 25 |
0.0 |
55.0 |
| 25 |
0.5 |
15.9 |
| 25 |
1.0 |
11.3 |
| 25 |
1.5 |
10.9 |
Four-probe method
"For transport critical current density measurements, sample of 0.25x0.35x7 mm
3 are cut along the grain orientation from different 1-2-3/Ag composites. Silver leads are attached to the samples by silver paste, and are annealed at 500 °C for 48 h in oxygen. Both continuous and pulsed DC currents are used..."
Cautions: Evaluated Data
