Material Specification for Bi:2223; [Bi-Sr-Ca-Cu-O]
Process: Solid State Reaction
Notes: "Specimens... were prepared by the solid state ceramic technique. Appropriate quantities of 5 N purity Bi2O3, SrCO3, CaCO3, and CuO were mixed and ground thoroughly and calcinated in air twice at 850 °C x 15 h. Bar-shaped specimens (45 mm x 4 mm x 3 mm) were then prepared by pressing the calcinated powder into a rectangular die. Two specimens were air sintered at 850 °C for 12 h and furnace cooled. One of the specimens marked specimen 1 was air annealed at 875 °C for 40 h. The other specimen marked specimen 2 was air annealed at 875 °C for 10 h only. Both the specimens were furnace cooled. Specimen 3 is a... pellet obtained from Professor C. Politis of the KFK Karlsruhe."
Formula: Bi2Sr2Ca2Cu3Ox
Informal Name: Bi:2223
Chemical Family: Bi-Sr-Ca-Cu-O
Chemical Class: Oxide
Structure Type:
Manufacturer: In House
Commercial Name:
Production Date:
Lot Number:
Production Form:
Critical Temperature for Bi:2223; [Bi-Sr-Ca-Cu-O]
| Specimen (Number) |
Critical Temperature (K) |
| 1 |
84 |
| 2 |
80 |
| 3 |
103 |
Measurement Method: Thermopower method
The authors cite S.R. Jha et al., Pramana J. Phys., Vol. 32, 277 (1989), and summarize the procedure as follows. "In brief, the bar shaped specimen is mounted in a vacuum can with its top end fixed in good thermal contact with the can. An electric heater is mounted at the bottom end of the specimen. The temperature gradient ΔT is measured on two points on the specimen about 15 mm apart with a differential thermocouple. The thermoinduced voltage ΔV was read with a Keithley nanovoltmeter with an accuracy of ±10 nV. The measured TEP (=ΔV/ΔT) was suitably corrected for the TEP of the pure Cu leads.
Cautions: Evaluated Data
Thermoelectric Power for Bi:2223; [Bi-Sr-Ca-Cu-O]
| Specimen Number () |
Temperature (K) |
Thermoelectric Power (µV/K) |
| 1 |
84 |
0.0 |
| 1 |
84 |
1.0 |
| 1 |
93 |
1.5 |
| 1 |
102 |
1.7 |
| 1 |
110 |
3.2 |
| 1 |
125 |
5.2 |
| 1 |
168 |
3.9 |
| 1 |
181 |
3.6 |
| 1 |
187 |
3.2 |
| 1 |
218 |
1.7 |
| 1 |
232 |
1.2 |
| 1 |
245 |
-0.5 |
| 1 |
148 |
-0.2 |
| 1 |
163 |
-0.4 |
| 1 |
174 |
-0.6 |
| 2 |
80 |
0.3 |
| 2 |
88 |
1.5 |
| 2 |
92 |
5.2 |
| 2 |
100 |
8.6 |
| 2 |
110 |
18.4 |
| 2 |
128 |
25.5 |
| 2 |
140 |
24.8 |
| 2 |
151 |
25.4 |
| 2 |
171 |
25.1 |
| 2 |
177 |
25.4 |
| 2 |
194 |
24.8 |
| 2 |
206 |
24.4 |
| 2 |
227 |
23.2 |
| 2 |
291 |
19.7 |
| 3 |
43 |
0.0 |
| 3 |
54 |
0.1 |
| 3 |
58 |
4.8 |
| 3 |
59 |
6.0 |
| 3 |
53 |
6.8 |
| 3 |
79 |
8.3 |
| 3 |
113 |
7.0 |
| 3 |
133 |
5.7 |
| 3 |
144 |
5.8 |
| 3 |
167 |
5.0 |
| 3 |
209 |
3.5 |
| 3 |
241 |
2.4 |
| 3 |
260 |
1.0 |
| 3 |
272 |
1.3 |
| 3 |
289 |
0.7 |
| 3 |
303 |
0.7 |
Measurement Method: Thermopower method
The authors cite S.R. Jha et al., Pramana J. Phys., Vol. 32, 277 (1989), and summarize the procedure as follows. "In brief, the bar shaped specimen is mounted in a vacuum can with its top end fixed in good thermal contact with the can. An electric heater is mounted at the bottom end of the specimen. The temperature gradient ΔT is measured on two points on the specimen about 15 mm apart with a differential thermocouple. The thermoinduced voltage ΔV was read with a Keithley nanovoltmeter with an accuracy of ±10 nV. The measured TEP (=ΔV/ΔT) was suitably corrected for the TEP of the pure Cu leads.
Cautions: Evaluated Data
Digitized data were obtained from Figures 2, 3, and 4 of the paper.
