Material Specification for Y:123; [Y-Ba-Cu-O]
Process: Solid State Reaction
Notes: "The YBCO powder was synthesized by solid-state reaction of the constituent oxides Y2O3, CuO, and BaO. Powders of Y2O3, CuO, and BaCO3 were mixed in appropriate proportions and were wet-ball-milled for approximately 12 h. The resulting slurry was dried in air and then vacuum-calcined in flowing oxygen at a reduced total pressure of (about) 0.0003 MPa. The heating schedule included slowly heating in flowing oxygen at a reduced total pressure of (about) 0.0003 MPa to 810 °C in 20 h and holding at the temperature for 8 h. Subsequently, the powder was cooled at 450 °C in a 100% flowing oxygen in 10 h. The powder was held at 450 °C for 3 h and then slowly cooled to room temperature... The YBCO powder was mixed with appropriate solvent, dispersant, binder, and plasticizer to form a slip for extrusion. The slip was milled for (about) 16 h in a plastic bottle containing ZrO2 balls. Subsequently, the solvent in the slip was partially evaporated to obtain a plastic mass. The plastic mass was then forced through a die at high pressures to produce flexible YBCO wires... The extruded wires (after drying) were cut into approximately 3 cm long pieces and were sintered in a tube furnace at different temperatures (910-950 °C) and PO2 levels (42 Pa-0.1 MPa)... Sintering was done in three stages: binder burnout, densification, and oxygen anneal. The initial binder burnout involved heating the specimens slowly to 240 °C and holding for 15 h to completely remove the organics, after which the temperature was raised to 910-950 °C at a rate of 1 °C/min. In the densification step, specimens were sintered at temperature for various lengths of time (10-20 h) and subsequently cooled to 450 °C at... 1 °C/min. Finally, the wires were annealed at 450 °C for 12 h in flowing oxygen at 0.1 MPa. The wires were then allowed to cool slowly in the furnace to room temperature..."
Formula: YBa2Cu3Ox
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:
Flexural Strength for Y:123; [Y-Ba-Cu-O]
| O2 Partial Pressure (kPa) |
Sintering Temperature (°C) |
Sintering Time (h) |
Flexural Strength (MPa) |
| 100 |
910 |
10 |
120 ± 10 |
| 100 |
925 |
10 |
141 ± 09 |
| 100 |
935 |
12 |
91 ± 07 |
| 100 |
935 |
20 |
95 ± 06 |
| 100 |
950 |
20 |
83 ± 05 |
| 1 |
910 |
10 |
191 ± 07 |
| 0.1 |
910 |
10 |
72 ± 19 |
| 0.042 |
910 |
10 |
73 ± 38 |
Measurement Method: Flexural strength
Cautions: Unevaluated Data
No measurement details were noted.
