Material Specification for Y:123; [Y-Ba(Zr)-Cu-O]
Process: Solid State Reaction
Notes: "Phase-pure, orthorhombic 123 was synthesized by solid-state reaction of reagent grade Y2O3, BaCO3 and CuO. Synthesis was accomplished in 4 h at 800 °C by exposure to pure oxygen of reduced total pressure. The 123 was mixed by mortar and pestle with 1, 5 or 10 mol% tetragonal ZrO2 particles (composition 97 mol% ZrO2, 3 mol% Y2O3; average particle size about 0.8 µm). Various concentrations of 211 were also added to the 123 or 123-ZrO2 mixtures. The 211 was synthesized in air by solid-state reaction at 950 °C. Bar specimens were cold pressed and sintered for 6 h in flowing oxygen at temperatures from 910 °C to 950 °C... Some bars were annealed in oxygen at 425 °C for 10 h to convert the tetragonal 123 to the superconducting orthorhombic phase. Resistivity versus temperature curves were obtained for these bars."
Formula: YBa2Cu3Ox•yZrO2•zY211
Informal Name: Y:123
Chemical Family: Y-Ba(Zr)-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(Zr)-Cu-O]
| Amount of ZrO2 (mol%) |
Amount of Y:211 (mol%) |
Critical Temperature (K) |
| 0 |
0 |
89 |
| 1 |
0 |
88 |
| 5 |
1 |
84 |
| 5 |
3 |
86 |
| 5 |
5 |
86 |
| 10 |
3 |
87 |
| 10 |
10 |
86 |
| 0 |
10 |
88 |
Measurement Method: Electrical resistance
Cautions: Unevaluated Data
No measurement details were noted. The authors indicated that T
c was evaluated as the zero resistance temperature.
Fracture Toughness for Y:123; [Y-Ba(Zr)-Cu-O]
| Amount of ZrO2 (mol%) |
Amount of Y:211 (mol%) |
Fracture Toughness (MPa·m1/2) |
| 0 |
0 |
1.2 ± 0.1 |
| 1 |
0 |
1.3 ± 0.1 |
| 10 |
0 |
2.7 ± 0.6 |
| 10 |
3 |
2.9 ± 0.7 |
| 0 |
10 |
1.4 ± 0.1 |
Measurement Method: Single-edge notched beam
The authors cite W.F. Brown, Jr. et al., ASTM STP 410 (ASTM, Philadelphia, 1967) p. 12, and summarize the procedure as follows. "Fracture toughness was measured... by the single-edge notched beam method. Four bars were tested for each condition. The average bar dimensions were about 50 mm x 7 mm x 3mm. Notches were cut normal to a 3 mm x 50 mm face (into the 7 mm dimension) and were about 3 mm deep. The bars were loaded in three-point bending at a rate of 1.27 mm min
-1. The outer support was 19 mm."
Cautions: Evaluated Data
