Material Specification for Tl:2223; [Tl(Bi)-Sr-Ca-Cu-O]
Process: Solid State Reaction
Notes: "Samples... were prepared by the following method. First, appropriate amounts of CaCO3, SrCO3 and CuO powders were mixed well. These mixtures were calcined at 850 °C in air for 8 h; then powders of Tl2O3, Bi2O3, PbO and Ca-Sr-Cu-O compounds were mixed well to form mixtures with a nominal composition of Tl:Bi:Pb:Ca:Sr:Cu of 2(1-x):2x:y:2:2:3 and 1:1:y:4:2:5, where 0 ≤x ≤1 and y=0, 0.2, 0.4, or 0.6. These mixtures were pressed into pellets and wrapped in Au foil. Next, they were sintered at 880 to 920 °C in oxygen flow for 3 h to 6 h, then cooled down to room temperature."
Formula: Tl2-xBixSr2Ca2Cu3Oy
Informal Name: Tl:2223
Chemical Family: Tl(Bi)-Sr-Ca-Cu-O
Chemical Class: Oxide
Structure Type: Polycrystalline
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:
Crystallography for Tl:2223; [Tl(Bi)-Sr-Ca-Cu-O]
| Crystal System: | Tetragonal |
| Formula Units per Cell: | |
| Space Group: |
|
Cell Parameters
| x of Bix (formula units) |
Temp
K
|
a
Å
|
b
Å
|
c
Å
|
| 0.4 |
296 |
3.813(3) |
-- |
15.266(5) |
Measurement Method: X-ray diffraction
"The crystal structure was analyzed through the X-ray diffraction method, and the lattice constants were calculated using the least squares method." No additional measurement details were noted.
Cautions: Evaluated Data
Critical Temperature for Tl:2223; [Tl(Bi)-Sr-Ca-Cu-O]
| Sintering Temperature (°C) |
Sintering Time (h) |
x of Bix (formula units) |
Critical Temperature (K) |
| 870 |
12 |
0.0 |
65 |
| 870 |
12 |
0.4 |
75 |
| 870 |
12 |
0.6 |
74 |
| 870 |
12 |
0.8 |
75 |
| 870 |
12 |
0.1 |
73 |
| 870 |
12 |
1.2 |
71 |
| 870 |
12 |
1.4 |
74 |
| 870 |
12 |
1.6 |
73 |
| 870 |
12 |
1.8 |
67 |
| 870 |
12 |
2.0 |
64 |
| 900 |
6 |
0.0 |
50 |
| 900 |
6 |
0.3 |
109 |
| 900 |
6 |
0.4 |
114 |
| 900 |
6 |
0.6 |
109 |
| 900 |
6 |
0.8 |
109 |
| 900 |
6 |
1.2 |
101 |
| 900 |
6 |
1.4 |
82 |
| 900 |
6 |
1.6 |
79 |
| 900 |
6 |
2.0 |
79 |
Measurement Method: Four-probe method
"The electrical resistivity of the samples was measured by the standard four-probe method... The critical temperature... is defined as the temperature at which zero resistivity occurs." No additional measurement details were noted.
Cautions: Evaluated Data
Digitized data were obtained from Figure 1 of the paper.
Magnetic Susceptibility for Tl:2223; [Tl(Bi)-Sr-Ca-Cu-O]
| x of Bix (formula units) |
Temperature (K) |
Magnetic Susceptibility (arbitrary) |
| 1.6 |
11 |
-0.24 |
| 1.6 |
35 |
-0.24 |
| 1.6 |
55 |
-0.22 |
| 1.6 |
69 |
-0.14 |
| 1.6 |
80 |
0.00 |
| 1.6 |
103 |
0.00 |
| 1.6 |
144 |
0.00 |
| 1.2 |
20 |
-0.42 |
| 1.2 |
37 |
-0.42 |
| 1.2 |
53 |
-0.41 |
| 1.2 |
68 |
-0.34 |
| 1.2 |
73 |
-0.21 |
| 1.2 |
77 |
-0.18 |
| 1.2 |
94 |
-0.14 |
| 1.2 |
107 |
-0.08 |
| 1.2 |
114 |
0.0 |
| 1.2 |
144 |
0.0 |
| 0.8 |
13 |
-0.47 |
| 0.8 |
33 |
-0.47 |
| 0.8 |
41 |
-0.47 |
| 0.8 |
54 |
-0.45 |
| 0.8 |
56 |
-0.46 |
| 0.8 |
73 |
-0.35 |
| 0.8 |
85 |
-0.26 |
| 0.8 |
96 |
-0.21 |
| 0.8 |
110 |
-0.10 |
| 0.8 |
112 |
0.00 |
| 0.8 |
144 |
0.00 |
| 0.4 |
7 |
-0.52 |
| 0.4 |
38 |
-0.50 |
| 0.4 |
67 |
-0.48 |
| 0.4 |
87 |
-0.41 |
| 0.4 |
104 |
-0.26 |
| 0.4 |
110 |
-0.11 |
| 0.4 |
112 |
0.00 |
| 0.4 |
129 |
0.00 |
| 0.4 |
144 |
0.00 |
Measurement Method: SQUID magnetometer
"... the DC magnetic susceptibility (was measured) by a SQUID magnetometer." No additional measurement details were noted.
Cautions: Evaluated Data
Digitized data were obtained from Figure 3 of the paper.
