Material Specification for Y:123; [Y-Ba-Cu-O]
Process: Solid State Reaction
Notes: The authors cite J.M.D. Coey et al., J. Solid State Chem., Vol. 77, 204 (1988), and summarize the procedure as follows. "A 0.45 mm thick superconducting sample of YBa2Cu3O7 was prepared by the usual powder sintering method."
Formula: YBa2Cu3O7
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:
Density (mass) for Y:123; [Y-Ba-Cu-O]
Measurement Method: Mass density method
"The density... (was) measured by weighing in acetone and air..."
Cautions: Evaluated Data
Thermal Diffusivity for Y:123; [Y-Ba-Cu-O]
| Temperature (ambient) (°C) |
Thermal Diffusivity (10-6 m2 s-1) |
| 25 |
0.171 |
| 50 |
0.156 |
| 75 |
0.148 |
| 100 |
0.143 |
| 200 |
0.131 |
| 400 |
0.119 |
| 600 |
0.113 |
Laser flash method
The authors cite W.J. Parker et al., J. Appl. Phys., Vol. 32, 1679 (1961), and summarize the procedure as follows. "The laser flash method of measuring thermal diffusivity involves using a laser to apply a heat pulse to the front surface of a thin slab of material and measuring the transit time of the heat to the rear surface... The thin superconducting sample was supported on a thermocouple... cross junction inside an evacuated quartz tube placed in a programmable tube furnace. The top surface of the sample was heated with a single 7 ms pulse from a Nd-YAG laser (wavelength = 1.06 µm)... The diffusivity was calculated using the time to half-height, taking into account the effect of cooling..."
Cautions: Evaluated Data
Data were obtained from Equation (6) and Figure 5 in the citation.
