Material Specification for Gd:123; [Gd-Ba-Cu-O]
Process: Solid State Reaction
Notes: "The ceramic specimens... were prepared by reacting weighed proportions of Gd2O3, BaO and CuO at 940 °C for 48 h in air. The product was ground into a fine powder, pressed into cylindrical pellets (about 1 cm diameter, 0.6 cm long), sintered at 940 °C in an oxygen flow for 48 h and then cooled slowly to room temperature at about 20 °C/h. The pressed pellets were lightly polished to produce flat faces parallel to about 10-4 rad."
Formula: GdBa2Cu3O7-x
Informal Name: Gd:123
Chemical Family: Gd-Ba-Cu-O
Chemical Class: Oxide
Structure Type: Polycrystalline
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:
Density (mass) for Gd:123; [Gd-Ba-Cu-O]
Measurement Method: Unknown density method
Cautions: Unevaluated Data
No measurement details were noted.
Elasticity Tensor for Gd:123; [Gd-Ba-Cu-O]
| C11 = | 86.8 |
| C12 = | |
| C13 = | |
| C22 = | |
| C23 = | |
| C33 = | |
| C44 = | 29.5 |
| C55 = | |
| C66 = | |
Measurement Method: Ultrasonic pulse-echo method
"Ultrasonic wave velocity measurements were made by the single-ended pulse echo overlap technique at a carrier frequency of 10 MHz. Quartz transducers (X cut for longitudinal, Y cut for shear) were used to excite and detect the ultrasonic waves. Hydrostatic pressures of up to about 1.5x10
8 Pa were applied in a piston-and-cylinder apparatus using silicone oil as the pressure transmitting medium, the pressure being measured by a precalibrated manganin resistance gauge. Pressure experiments were made at room temperature; Dow Resin (276-V9) was used to bond the quartz transducers to the specimen." The authors indicated that measurements were made at 295 K.
Cautions: Evaluated Data
Elastic Modulus for Gd:123; [Gd-Ba-Cu-O]
| Pressure (MPa) |
Elastic Modulus (GPa) |
| 0 |
73.4 |
| 50 |
73.7 |
| 100 |
74.0 |
| 150 |
74.3 |
Measurement Method: Ultrasonic pulse-echo method
"Ultrasonic wave velocity measurements were made by the single-ended pulse echo overlap technique at a carrier frequency of 10 MHz. Quartz transducers (X cut for longitudinal, Y cut for shear) were used to excite and detect the ultrasonic waves. Hydrostatic pressures of up to about 1.5x10
8 Pa were applied in a piston-and-cylinder apparatus using silicone oil as the pressure transmitting medium, the pressure being measured by a precalibrated manganin resistance gauge. Pressure experiments were made at room temperature; Dow Resin (276-V9) was used to bond the quartz transducers to the specimen." The authors indicated that measurements were made at 295 K.
Cautions: Evaluated Data
Values for the elastic modulus were estimated from the shear and bulk moduli assuming the media to be approximately isotropic.
Digitized data were obtained from Figure 2c of the paper.
Shear Modulus for Gd:123; [Gd-Ba-Cu-O]
| Pressure (MPa) |
Shear Modulus (GPa) |
| 0 |
29.52 |
| 50 |
29.58 |
| 100 |
29.63 |
| 150 |
29.68 |
Measurement Method: Ultrasonic pulse-echo method
"Ultrasonic wave velocity measurements were made by the single-ended pulse echo overlap technique at a carrier frequency of 10 MHz. Quartz transducers (X cut for longitudinal, Y cut for shear) were used to excite and detect the ultrasonic waves. Hydrostatic pressures of up to about 1.5x10
8 Pa were applied in a piston-and-cylinder apparatus using silicone oil as the pressure transmitting medium, the pressure being measured by a precalibrated manganin resistance gauge. Pressure experiments were made at room temperature; Dow Resin (276-V9) was used to bond the quartz transducers to the specimen." The authors indicated that measurements were made at 295 K.
Cautions: Evaluated Data
Digitized data were obtained from Figure 2b of the paper.
Bulk Modulus for Gd:123; [Gd-Ba-Cu-O]
| Pressure (MPa) |
Bulk Modulus (GPa) |
| 0 |
47.5 |
| 50 |
48.3 |
| 100 |
49.1 |
| 150 |
49.8 |
Measurement Method: Ultrasonic pulse-echo method
"Ultrasonic wave velocity measurements were made by the single-ended pulse echo overlap technique at a carrier frequency of 10 MHz. Quartz transducers (X cut for longitudinal, Y cut for shear) were used to excite and detect the ultrasonic waves. Hydrostatic pressures of up to about 1.5x10
8 Pa were applied in a piston-and-cylinder apparatus using silicone oil as the pressure transmitting medium, the pressure being measured by a precalibrated manganin resistance gauge. Pressure experiments were made at room temperature; Dow Resin (276-V9) was used to bond the quartz transducers to the specimen." The authors indicated that measurements were made at 295 K.
Cautions: Evaluated Data
Digitized data were obtained from Figure 2c of the paper.
Sound Velocity for Gd:123; [Gd-Ba-Cu-O]
| Mode () |
Pressure (MPa) |
Sound Velocity (km/s) |
| Longitudinal |
5 |
3.956 |
| Longitudinal |
19 |
3.963 |
| Longitudinal |
33 |
3.971 |
| Longitudinal |
46 |
3.975 |
| Longitudinal |
59 |
3.982 |
| Longitudinal |
72 |
3.986 |
| Longitudinal |
88 |
3.993 |
| Longitudinal |
104 |
3.998 |
| Longitudinal |
120 |
4.004 |
| Longitudinal |
132 |
4.007 |
| Longitudinal |
143 |
4.012 |
| Shear |
0 |
2.306 |
| Shear |
20 |
2.308 |
| Shear |
41 |
2.308 |
| Shear |
65 |
2.309 |
| Shear |
88 |
2.310 |
| Shear |
108 |
2.311 |
| Shear |
147 |
2.313 |
Measurement Method: Ultrasonic pulse-echo method
"Ultrasonic wave velocity measurements were made by the single-ended pulse echo overlap technique at a carrier frequency of 10 MHz. Quartz transducers (X cut for longitudinal, Y cut for shear) were used to excite and detect the ultrasonic waves. Hydrostatic pressures of up to about 1.5x10
8 Pa were applied in a piston-and-cylinder apparatus using silicone oil as the pressure transmitting medium, the pressure being measured by a precalibrated manganin resistance gauge. Pressure experiments were made at room temperature; Dow Resin (276-V9) was used to bond the quartz transducers to the specimen." The authors indicated that measurements were made at 295 K.
Cautions: Evaluated Data
Digitized data were obtained from Figure 1 of the paper.
