Material Specification for Y:123; [Y-Ba(Sr)-Cu-O]
Process: Solid State Reaction
Notes: "Precursor powders used in this investigation include Y2O3, BaCO3, SrCO3, and CuO, of at least 99.9% purity, and free of water contamination. The powders were weighed in amounts so as to produce a nominal stoichiometry of 1:2:3 in the final product. Before heat treatment the powders were finely ground to a consistent colour, and then pressed into pellets at 240 MPa. The initial heating rate did not exceed 1 °C min-1 in the temperature range of 500 °C to 900 °C . Several progressive cycles of heat treatments were employed, each separated by grinding and pressing."
Formula: YBa2-xSrxCu3O7-x
Informal Name: Y:123
Chemical Family: Y-Ba(Sr)-Cu-O
Chemical Class: Oxide
Structure Type: Polycrystalline
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:
Crystallography for Y:123; [Y-Ba(Sr)-Cu-O]
| Crystal System: | Orthorhombic |
| Formula Units per Cell: | |
| Space Group: |
|
Cell Parameters
| x of Srx (formula units) |
Temp
K
|
a
Å
|
b
Å
|
c
Å
|
| 0.0 |
296 |
3.816 |
3.882 |
11.684 |
| 0.2 |
296 |
3.818 |
3.888 |
11.668 |
| 0.4 |
296 |
3.811 |
3.877 |
11.641 |
| 0.6 |
296 |
3.797 |
3.868 |
11.610 |
| 0.8 |
296 |
3.801 |
3.864 |
11.599 |
| 1.0 |
296 |
3.795 |
3.853 |
11.572 |
| 1.2 |
296 |
3.798 |
3.843 |
11.531 |
| 1.4 |
296 |
3.787 |
3.816 |
11.528 |
| 1.6 |
296 |
3.806 |
3.822 |
11.518 |
| 1.8 |
296 |
3.792 |
3.809 |
11.501 |
| 2.0 |
296 |
3.777 |
3.791 |
11.494 |
Measurement Method: X-ray diffraction
Powder x-ray diffraction patterns were obtained using CuKα radiation. No additional measurement details were noted.
Cautions: Evaluated Data
Critical Temperature for Y:123; [Y-Ba(Sr)-Cu-O]
| x of Srx (formula units) |
Critical Temperature (K) |
| 0 |
91.0 |
| 0.2 |
86.0 |
| 0.4 |
82.5 |
| 0.6 |
82.5 |
| 0.8 |
76.5 |
| 1.0 |
80.0 |
| 1.2 |
76.0 |
| 1.4 |
77.0 |
| 1.6 |
73.0 |
Measurement Method: Vibrating sample magnetometer
Cautions: Unevaluated Data
No measurement details were noted.
