Material Specification for Tl:1223; [Tl-Ba-Ca-Cu-O:Ag]
Process: Solid State Reaction
Notes: The authors cite K. Heine et al., Appl. Phys. Lett., Vol. 55, 2441 (1989), and summarize the procedure as follows. "The TlBa2Ca2Cu3O8 powder was synthesized by reacting a mixture of Tl2O3 with BaCuO2 and Ca2CuO3 precursors. Initial alkaline earth carbonated and CuO reactants were dried by heating at 400 °C for 7 h. The BaCuO2 was prepared by sintering a mixture (99.99% purity) of BaCO3 and CuO in an alumina cell using the schedule 885 °C for 10 h, ramping to 975 °C over 24 h, and holding at 975 °C for 24 h. The Ca2CuO3 and CuO mixture (99.99%) purity) in a stepped manner using 885 °C, 920 °C, 950 °C, and 975 °C sinterings for 24 h each with intermediate grindings. These precursor powders were mixed with Tl2O3 in the ratio BaCuO2: Ca2CuO3: Tl2O3 of 1:0.5:0.532 by grinding with a mortar and pestle. The powder was then pressed into pellets and sintered in a covered gold boat placed in a alumina tube in a series of heating stages with intermediate weighings, grindings, and pressings. The samples were sintered at 925 °C for 3 h, 890 °C for 48 h, 900 °C for 15 h, and 890 °C for 60 h. The first sintering was performed under a positive oxygen pressure of about (133 kPa = 1000 torr), and the products were the Tl-2223 and Tl-2212 phases. Subsequent heatings to produce Tl-1223 were performed under a positive oxygen pressure of about (33 kPa = 250 torr)... The tape was fabricated by the oxide powder in tube process. The Tl-1223 powder was ground with a mortar and pestle for 0.5 h prior to loading into a silver tube (6.35 mm OD x 4.35 mm ID x 10 cm long) that had been previously welded closed at one end. The silver tube had been thoroughly cleaned by swabbing with methanol followed by drying... The remaining tube end was then pressed and welded closed. The tube assembly was drawn down through a series of 44 dies to a final outer diameter of 1.0 mm and a length of 5 m. The resulting wire was then formed into a tape by rolling in four passes to a final thickness of 0.24 mm."
Formula: TlBa2Ca2Cu3O8•xAg
Informal Name: Tl:1223
Chemical Family: Tl-Ba-Ca-Cu-O:Ag
Chemical Class: Oxide
Structure Type: Polycrystalline
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:
Critical Temperature for Tl:1223; [Tl-Ba-Ca-Cu-O:Ag]
| Critical Temperature (K) |
| 110 |
Measurement Method: SQUID magnetometer
"The magnetic susceptibility of a sample was determined with a Quantum Design Model MPMS SQUID susceptometer. A scan length of 3 cm was used to avoid the problem of magnetic field inhomogeneities. T
c was determined from the onset of diamagnetism in the shielding (zero field cooled) susceptibility in (796 A/m = 10 Oe). High-field magnetization hysteresis loops were taken in the "fast hysteresis mode"... J
c values (were determined) from the Bean model expressions for the hysteresis of the magnetization."
Cautions: Evaluated Data
Critical Current Density for Tl:1223; [Tl-Ba-Ca-Cu-O:Ag]
| Temperature (K) |
Magnetic Field (T) |
Critical Current Density (kA/cm2) |
| 7 |
0.0 |
640 |
| 7 |
1.3 |
410 |
| 7 |
2.7 |
310 |
| 7 |
4.3 |
240 |
| 7 |
4.9 |
96 |
| 20 |
0.0 |
370 |
| 20 |
0.2 |
340 |
| 20 |
1.0 |
160 |
| 20 |
2.3 |
100 |
| 20 |
3.5 |
87 |
| 20 |
4.5 |
73 |
| 20 |
4.8 |
73 |
| 20 |
4.9 |
56 |
| 35 |
0.0 |
220 |
| 35 |
0.1 |
220 |
| 35 |
0.6 |
96 |
| 35 |
1.5 |
56 |
| 35 |
2.3 |
35 |
| 35 |
3.3 |
27 |
| 35 |
3.5 |
19 |
| 35 |
4.3 |
17 |
| 35 |
4.5 |
12 |
| 35 |
4.9 |
11 |
| 50 |
0.0 |
130 |
| 50 |
0.4 |
46 |
| 50 |
1.0 |
23 |
| 50 |
1.5 |
10 |
| 50 |
1.8 |
9.1 |
| 50 |
2.0 |
5.8 |
| 50 |
2.3 |
5.3 |
| 50 |
2.5 |
3.1 |
| 50 |
2.8 |
3.1 |
| 50 |
3.0 |
2.2 |
| 50 |
3.3 |
0.96 |
| 64 |
0.0 |
73 |
| 64 |
0.2 |
30 |
| 64 |
0.5 |
11 |
| 64 |
0.9 |
3.7 |
| 64 |
1.0 |
2.2 |
| 64 |
1.3 |
1.0 |
| 75 |
0.0 |
39 |
| 75 |
0.2 |
9.1 |
| 75 |
0.4 |
3.4 |
| 75 |
0.5 |
3.1 |
| 75 |
0.7 |
1.1 |
| 75 |
0.7 |
0.73 |
Measurement Method: SQUID magnetometer
"The magnetic susceptibility of a sample was determined with a Quantum Design Model MPMS SQUID susceptometer. A scan length of 3 cm was used to avoid the problem of magnetic field inhomogeneities. T
c was determined from the onset of diamagnetism in the shielding (zero field cooled) susceptibility in (796 A/m = 10 Oe). High-field magnetization hysteresis loops were taken in the "fast hysteresis mode"... J
c values (were determined) from the Bean model expressions for the hysteresis of the magnetization."
Cautions: Evaluated Data
Digitized data were obtained from Figure 10 of the paper.
Magnetic Susceptibility for Tl:1223; [Tl-Ba-Ca-Cu-O:Ag]
| Processing Condition () |
Temperature (K) |
Magnetic Susceptibility (arbitrary) |
| powder |
12 |
-1.00 |
| powder |
19 |
-0.98 |
| powder |
29 |
-0.96 |
| powder |
58 |
-0.89 |
| powder |
83 |
-0.77 |
| powder |
94 |
-0.65 |
| powder |
99 |
-0.38 |
| powder |
102 |
-0.16 |
| powder |
103 |
-0.11 |
| powder |
113 |
-0.04 |
| powder |
115 |
-0.01 |
| rolled |
9 |
-0.99 |
| rolled |
29 |
-0.98 |
| rolled |
54 |
-0.92 |
| rolled |
68 |
-0.80 |
| rolled |
77 |
-0.60 |
| rolled |
82 |
-0.44 |
| rolled |
87 |
-0.21 |
| rolled |
92 |
-0.04 |
| rolled |
100 |
-0.01 |
| rolled |
116 |
0 |
| pressed |
10 |
-0.99 |
| pressed |
24 |
-0.97 |
| pressed |
58 |
-0.80 |
| pressed |
78 |
-0.52 |
| pressed |
82 |
-0.42 |
| pressed |
87 |
-0.27 |
| pressed |
93 |
-0.11 |
| pressed |
94 |
-0.07 |
| pressed |
100 |
-0.02 |
| pressed |
116 |
0 |
Measurement Method: SQUID magnetometer
"The magnetic susceptibility of a sample was determined with a Quantum Design Model MPMS SQUID susceptometer. A scan length of 3 cm was used to avoid the problem of magnetic field inhomogeneities. T
c was determined from the onset of diamagnetism in the shielding (zero field cooled) susceptibility in (796 A/m = 10 Oe). High-field magnetization hysteresis loops were taken in the "fast hysteresis mode"... J
c values (were determined) from the Bean model expressions for the hysteresis of the magnetization."
Cautions: Evaluated Data
Digitized data were obtained from Figure 7 of the paper.
