Material Specification for Y:123; [Y-Ba-Cu-O:Ag]
Process: Solid State Reaction
Notes: "Y2O3 (99.9%) BaCO3 (99.9%), and CuO (99.9%) were mixed in the appropriate ratio in an agate mortar. The mixture was then calcined at 950 °C for 32 h in air with one intermediate grinding. The calcined powder was mixed with Ag2O to obtain volume fractions of Ag varying from 0% to 100% ...and sintered at temperatures between 830 °C and 950 °C, depending on the Ag content."
Formula: YBa2Cu3O7-x•yAg
Informal Name: Y:123
Chemical Family: Y-Ba-Cu-O:Ag
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:Ag]
| Volume Fraction of Ag (%) |
Density (g cm-3) |
| 0 |
5.60 |
| 10 |
5.76 |
| 20 |
6.40 |
| 30 |
9.34 |
| 50 |
9.40 |
| 70 |
9.80 |
| 100 |
10.50 |
Measurement Method: Archimedes' method
"The densities of the samples were measured by the Archimedes method..."
Cautions: Evaluated Data
Thermoelectric Power for Y:123; [Y-Ba-Cu-O:Ag]
| Volume Fraction of Ag (%) |
Temperature (K) |
Thermoelectric Power (µV/K) |
| 0 |
86 |
0.1 |
| 0 |
90 |
6.1 |
| 0 |
94 |
9.2 |
| 0 |
100 |
11.3 |
| 0 |
141 |
8.6 |
| 0 |
180 |
5.8 |
| 0 |
220 |
3.6 |
| 0 |
250 |
3.1 |
| 0 |
300 |
3.3 |
| 20 |
86 |
0.1 |
| 20 |
88 |
4.2 |
| 20 |
92 |
6.6 |
| 20 |
111 |
8.1 |
| 20 |
163 |
6.2 |
| 20 |
200 |
3.7 |
| 20 |
250 |
2.5 |
| 20 |
300 |
3.0 |
| 30 |
86 |
0.1 |
| 30 |
90 |
3.3 |
| 30 |
101 |
4.9 |
| 30 |
122 |
6.0 |
| 30 |
163 |
4.0 |
| 30 |
202 |
2.8 |
| 30 |
241 |
1.9 |
| 30 |
263 |
1.8 |
| 30 |
300 |
2.7 |
| 60 |
86 |
0.2 |
| 60 |
133 |
3.6 |
| 60 |
183 |
1.8 |
| 60 |
222 |
1.2 |
| 60 |
283 |
1.1 |
| 60 |
304 |
1.5 |
Measurement Method: Thermopower method
The authors cite R. Srinivasan, p. 87 in High-Temperature Superconductors, Edited by S.V. Subramanyam and E.S. Rajagopal, South Asia Books, Columbia, MO, 1989, and summarize the procedure as follows. "A pellet of 2-mm thickness and 10-mm diameter was held between two Cu plates. A temperature difference (ΔT) of 5 K was established between the upper and lower surfaces of the pellet by means of a small heater positioned on the upper side of the top copper-plate. Temperature difference was measured by two chromel-alumel thermocouples positioned in the two Cu plates. The thermo-emf was measured by a nanovoltmeter. The mean temperature of the sample was measured by a Pt resistance thermometer."
Cautions: Evaluated Data
Digitized data were obtained from Figure 6 of the paper.
