Material Specification for Bi:2212; [Bi-Sr-Ca-Cu-O]
Process: Floating Zone
Notes: The authors cite Y. Kubo et al., Jpn. J. Appl. Phys., Vol. 28(11), L1936 (1989), and summarize the procedure as follows. "The BSCCO specimens were prepared by the (floating zone) method, by which we can obtain well orientated large specimens, with typical dimension of 3-4 mm in diameter and 20-30 mm in length. The specimens were doped with silver to 10 wt% to improve their crystallographic orientation in the c-axis direction... Specimens 3-4 mm in diameter and 20 mm long (10 mm long for BSCCO along the c-axis) were prepared for all the materials. Both ends of the cylindrical specimens were made flat and parallel to each other."
Formula: Bi2Sr2CaCu2O8+x
Informal Name: Bi:2212
Chemical Family: Bi-Sr-Ca-Cu-O
Chemical Class: Oxide
Structure Type: Polycrystalline
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:
Critical Temperature for Bi:2212; [Bi-Sr-Ca-Cu-O]
| Critical Temperature (K) |
| 92 |
Measurement Method: Electrical resistance
"The critical temperatures of the specimens were determined by resistive measurements..." No additional measurement details were noted.
Cautions: Unevaluated Data
Thermal Expansion for Bi:2212; [Bi-Sr-Ca-Cu-O]
| Direction () |
Temperature (K) |
Thermal Expansion (10-6 K-1) |
| ab-plane |
10 |
0.07 |
| ab-plane |
50 |
2.08 |
| ab-plane |
100 |
4.27 |
| ab-plane |
150 |
5.82 |
| ab-plane |
200 |
7.16 |
| ab-plane |
250 |
8.22 |
| ab-plane |
300 |
8.34 |
| c-axis |
10 |
0.62 |
| c-axis |
50 |
4.78 |
| c-axis |
100 |
8.86 |
| c-axis |
150 |
11.74 |
| c-axis |
200 |
13.55 |
| c-axis |
250 |
14.89 |
| c-axis |
300 |
15.11 |
Measurement Method: Dilatometry
The authors cite M. Okaji et al., J. Phys. E: Sci. Instrum., Vol. 20, 887 (1987), and summarize the procedure as follows. "The thermal expansion was measured in the temperature range 10-300 K by an interferometric absolute dilatometer, utilizing optical heterodyne interferometry... The temperature of the specimen was measured by an a.c. resistance bridge system with a Rh-Fe resistance thermometer... The uncertainties in the length and temperature measurements of the dilatometer are within 5 nm and 10 mK, respectively. The specimens were located in a helium atmosphere at 10 Pa to improve their thermal relaxation for the measurements between 10 K and 300 K... The CTE is determined by α = dL/(L
0dT) where: dL is the change in length of the specimen; L
0 is the specimen length at 293 K; and dT is the temperature interval. The temperature interval between the two equilibrium temperatures was selected to be (about) 10 K throughout the experiment."
Cautions: Evaluated Data
