Material Specification for Y:123; [Y-Ba-Cu-O]
Process: Solid State Reaction
Notes: "The sample was prepared by thoroughly mixing and grinding with an agate mortar and pestle BaCO3, Y2O3, and CuO powders (99.999% pure) and reacting the mixture in air at 950 °C for 24 h, with two intermediate grindings. After being treated in a stream of pure oxygen at 900 °C for 24 h, the powder was cooled to room temperature at a rate of 12 °C/h, and was ground again. The powder was then pressed into a pellet in a 2 cm diameter die using a pressure of 25 MPa applied for 5 min. Finally, the pellet was heated to 930 °C for 24 h and slowly cooled to room temperature at the same cooling rate in flowing oxygen."
Formula: YBa2Cu3O7-x
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: Bar
Thermal Conductivity for Y:123; [Y-Ba-Cu-O]
Field Direction () |
Magnetic Field (T) |
Temperature (K) |
Thermal Conductivity (W m-1 K-1) |
-- |
0 |
5.4 |
1.1 |
-- |
0 |
5.9 |
1.3 |
-- |
0 |
6.0 |
1.4 |
-- |
0 |
6.5 |
1.5 |
-- |
0 |
6.8 |
1.6 |
-- |
0 |
7.2 |
1.8 |
-- |
0 |
7.8 |
2.1 |
-- |
0 |
10.2 |
3.1 |
-- |
0 |
13.1 |
4.3 |
-- |
0 |
18.4 |
6.2 |
-- |
0 |
25.9 |
8.2 |
perpendicular |
3 |
5.5 |
1.1 |
perpendicular |
3 |
6.0 |
1.2 |
perpendicular |
3 |
6.6 |
1.4 |
perpendicular |
3 |
7.1 |
1.7 |
perpendicular |
3 |
9.2 |
2.5 |
perpendicular |
3 |
11.7 |
3.6 |
perpendicular |
3 |
15.7 |
5.0 |
perpendicular |
3 |
19.0 |
5.9 |
perpendicular |
3 |
22.1 |
7.0 |
perpendicular |
3 |
25.8 |
7.8 |
parallel |
3 |
5.2 |
1.1 |
parallel |
3 |
5.7 |
1.3 |
parallel |
3 |
6.7 |
1.7 |
parallel |
3 |
7.2 |
1.9 |
parallel |
3 |
8.9 |
2.6 |
parallel |
3 |
9.7 |
2.9 |
parallel |
3 |
10.5 |
3.3 |
parallel |
3 |
12.5 |
4.1 |
parallel |
3 |
14.8 |
4.8 |
parallel |
3 |
18.6 |
6.0 |
parallel |
3 |
21.5 |
6.8 |
parallel |
3 |
25.9 |
7.9 |
Measurement Method: Steady-state heat flow
"A rectangular piece of dimensions 2.5x3.5x20 mm
3 was cut from the pellet... The thermal conductivity was meaured... with one end of the sample anchored to a copper block in a helium cryostat and a carbon thermometer attached to the opposite end of the sample. Two strain gauges, anchored at two positions along the sample, were used as electrrical heaters... The magnetic field was provided by a superconducting solenoid. The sample was first mounted on an insert oriented so that the heat flow was directed perpendicular to the field. After measuring its thermal conductivity, the sample was then remounted, with the heaters and thermometers untouched, so that the heat flow as directed parallel to the field."
Cautions: Evaluated Data
Data were digitized from Figure 2 of the paper.