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, L1936 (1989), and summarize the procedure as follows. "Bi-2212 bulk samples with 0, 10 and 15 wt% Ag doping were prepared by the floating zone (FZ) method at Japan Fine Ceramics Center (JFCC). ... The FZ samples consists of large superconducting grains with dimensions of the order of a centimetre by a millimetre in the a-b plane and about 10 µm in the c-axis plane. Moreover, the sample has a textured structure with the c-axes of the 2212 crystals nearly parallel to each other."
Formula: Bi2Sr2CaCu2Ox
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]
| Mass Fraction of Ag (%) |
Critical Temperature (K) |
| 0 |
86.3 |
| 10 |
93.6 |
| 15 |
93.1 |
Measurement Method: Transport properties method
The authors cite N. Hobara et al., Cryog Eng, Vol. 28, 688 (1993) (in Japanese), and summarize the procedure as follows. "Recently, we have developed a fully automatic measuring system for thermal and electrical conductivity using a helium refrigerator... The sample size for thermal conductivity measurements is typically 2.0x2.0x15.0 mm
3. The thermal conductivity of the Bi-2212 bulk samples was measured in the range 15-200 K using a steady state heat-flow method. One end of the sample is attached by indium solder to the copper block in the cold head of the helium refrigerator. The heater (chip resistor) is also attached with GE7051 varnish to another end of the sample. The temperature gradient is monitored by differential thermocouples (Au+0.07) at% Fe alloy-Chromel) with a terminal distance of about 8 mm. The heat flow is applied along the longitudinal direction of the sample. ...this sample can be regarded as a quasi-single crystal and the in-plane thermal conductivity is the parameter usually measured in the present experiment."
Cautions: Evaluated Data
Resistivity (normal state) for Bi:2212; [Bi-Sr-Ca-Cu-O]
| Mass Fraction of Ag (%) |
Temperature (K) |
Resistivity (normal state) (mΩ·cm) |
| 0 |
273 |
0.75 |
| 10 |
273 |
0.25 |
| 15 |
273 |
0.12 |
Measurement Method: Transport properties method
The authors cite N. Hobara et al., Cryog Eng, Vol. 28, 688 (1993) (in Japanese), and summarize the procedure as follows. "Recently, we have developed a fully automatic measuring system for thermal and electrical conductivity using a helium refrigerator... The sample size for thermal conductivity measurements is typically 2.0x2.0x15.0 mm
3. The thermal conductivity of the Bi-2212 bulk samples was measured in the range 15-200 K using a steady state heat-flow method. One end of the sample is attached by indium solder to the copper block in the cold head of the helium refrigerator. The heater (chip resistor) is also attached with GE7051 varnish to another end of the sample. The temperature gradient is monitored by differential thermocouples (Au+0.07) at% Fe alloy-Chromel) with a terminal distance of about 8 mm. The heat flow is applied along the longitudinal direction of the sample. ...this sample can be regarded as a quasi-single crystal and the in-plane thermal conductivity is the parameter usually measured in the present experiment."
Cautions: Evaluated Data
Thermal Conductivity for Bi:2212; [Bi-Sr-Ca-Cu-O]
| Mass Fraction of Ag (%) |
Temperature (°C) |
Thermal Conductivity (W m-1 K-1) |
| 0 |
13 |
1.46 |
| 0 |
40 |
2.21 |
| 0 |
81 |
2.54 |
| 0 |
121 |
2.87 |
| 0 |
160 |
3.35 |
| 0 |
196 |
3.67 |
| 10 |
13 |
5.35 |
| 10 |
40 |
6.97 |
| 10 |
82 |
6.72 |
| 10 |
122 |
7.06 |
| 10 |
160 |
7.53 |
| 10 |
197 |
8.29 |
| 15 |
12 |
14.15 |
| 15 |
22 |
15.02 |
| 15 |
38 |
12.45 |
| 15 |
57 |
10.30 |
| 15 |
80 |
9.89 |
| 15 |
122 |
9.80 |
| 15 |
160 |
10.13 |
| 15 |
195 |
10.74 |
Measurement Method: Transport properties method
The authors cite N. Hobara et al., Cryog Eng, Vol. 28, 688 (1993) (in Japanese), and summarize the procedure as follows. "Recently, we have developed a fully automatic measuring system for thermal and electrical conductivity using a helium refrigerator... The sample size for thermal conductivity measurements is typically 2.0x2.0x15.0 mm
3. The thermal conductivity of the Bi-2212 bulk samples was measured in the range 15-200 K using a steady state heat-flow method. One end of the sample is attached by indium solder to the copper block in the cold head of the helium refrigerator. The heater (chip resistor) is also attached with GE7051 varnish to another end of the sample. The temperature gradient is monitored by differential thermocouples (Au+0.07) at% Fe alloy-Chromel) with a terminal distance of about 8 mm. The heat flow is applied along the longitudinal direction of the sample. ...this sample can be regarded as a quasi-single crystal and the in-plane thermal conductivity is the parameter usually measured in the present experiment."
Cautions: Evaluated Data
Digitized data were obtained from Figure 2a of the paper.
