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NIST High Temp. Superconducting Materials (HTS) Database:

NIST Standard Reference Database 62

Last Update to Data Content: 1996

DOI: https://doi.org/10.18434/T4KP8J

Bibliographic Information

Title: Anisotropic Elastic and Nonlinear Acoustic Properties of Very Dense Textured Bi2Sr2CaCu2O8+y
Author(s): F.Chang, P.J.Ford, G.A.Saunders, L.Jiaqiang, D.P.Almond, B.Chapman, M.Cankurtaran, R.B.Poeppel, and K.C.Goretta
Publication: Superconductor Science and Technology Volume: 6 Issue: Not Available Year: 1993 Page(s): 484-489
Editor(s): Not Available
Publisher: IOP Publishing Ltd
Language: English
Notes: Not Available
Keywords: Material Specification, Density (mass), Elastic Modulus, Sound Velocity

Materials and Properties

Bi:2212; [Bi-Sr-Ca-Cu-O]
Material Specification for Bi:2212; [Bi-Sr-Ca-Cu-O] Process: Solid State Reaction
Notes: The authors cite C. Y. Chu et al., Supercond. Sci. Technol., Vol. 5, 306 (1992), and summarize the procedure as follows. "The Bi2212 powder was synthesized from a mixture of Bi2O3, SrCO3, and CuO. The actual composition was Bi2Sr1.7CaCu2Ox, which yielded nearly 100% phase pure Bi2212. The powders were ball-milled for 18-24 h in polyethylene jars containing methanol and ZrO2 grinding media. The milled powders were dried, ground lightly in an agate mortar with an agate pestle, and heated in air for 2-3 days at 815-820 °C. The resulting powder was ground in a tungsten carbide rotary mill. The Bi2212 powder obtained was processsed into bulk specimens by powder forging in air at 840 °C."
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:

Density (mass) for Bi:2212; [Bi-Sr-Ca-Cu-O]
Density (g cm-3)
6.208
Measurement Method: Unknown density method

Cautions: Unevaluated Data
No measurement details were noted.
Elastic Modulus for Bi:2212; [Bi-Sr-Ca-Cu-O]
Direction () Pressure (GPa) Elastic Modulus (GPa)
ab-plane 0.00 118.2
ab-plane 0.02 118.6
ab-plane 0.06 119.0
ab-plane 0.10 119.6
ab-plane 0.12 119.8
ab-plane 0.13 120.0
ab-plane 0.14 120.0
c-axis 0.00 44.2
c-axis 0.01 44.6
c-axis 0.02 44.9
c-axis 0.04 45.6
c-axis 0.07 46.3
c-axis 0.11 46.9
c-axis 0.12 47.1
c-axis 0.12 47.0
c-axis 0.13 47.0
c-axis 0.14 47.5
c-axis 0.14 47.5
Measurement Method: Ultrasonic method
"The samples were cut in the form of a rectangular parallelepiped and polished lightly to give flat and parallel faces to about 10-4 rad. One pair of faces of the sample was perpendicular to the forging direction. Ultrasonic pulses were generated and detected by X- or Y-cut (for longitudinal and shear waves respectively) quartz 10-MHz transducers bonded to the specimen using Nonaq stopcock grease for temperature studies and Dow resin for pressure studies. To measure the effects of temperature an ultrasonic wave transit time, a pulse-echo overlap system capable of detecting changes in ultrasonic transit time in these ceramic specimens to 1 part in 105, was used... Temperature dependences of ultrasonic wave velocity were measured in a closed-cycle refrigerator... The temperature was changed at a rate of about 0.4 K/min during both cooling and warming cycles. A study of the pressure dependence of the sound velocity was made at room temperature (290 K) with an apparatus in which hydrostatic pressures up to 0.15 GPa were applied to the samples of a piston and cylinder arrangement that used silicone oil as the pressure-transmitting medium. Pressure was measured with a precalibrated manganin resistance gauge."

Cautions: Evaluated Data
Digitized data were obtained from Figure 4 of the paper.
Sound Velocity for Bi:2212; [Bi-Sr-Ca-Cu-O]
Mode () Direction () Temperature (K) Sound Velocity (km/s)
Longitudinal ab-plane 20 4.471
Longitudinal ab-plane 80 4.458
Longitudinal ab-plane 141 4.443
Longitudinal ab-plane 192 4.423
Longitudinal ab-plane 232 4.401
Longitudinal ab-plane 260 4.385
Longitudinal ab-plane 291 4.369
Longitudinal c-axis 22 2.699
Longitudinal c-axis 76 2.696
Longitudinal c-axis 130 2.693
Longitudinal c-axis 184 2.688
Longitudinal c-axis 225 2.681
Longitudinal c-axis 258 2.675
Longitudinal c-axis 287 2.670
Shear ab-plane 20 2.544
Shear ab-plane 59 2.540
Shear ab-plane 109 2.532
Shear ab-plane 189 2.508
Shear ab-plane 229 2.489
Shear ab-plane 258 2.474
Shear ab-plane 289 2.464
Measurement Method: Ultrasonic method
"The samples were cut in the form of a rectangular parallelepiped and polished lightly to give flat and parallel faces to about 10-4 rad. One pair of faces of the sample was perpendicular to the forging direction. Ultrasonic pulses were generated and detected by X- or Y-cut (for longitudinal and shear waves respectively) quartz 10-MHz transducers bonded to the specimen using Nonaq stopcock grease for temperature studies and Dow resin for pressure studies. To measure the effects of temperature an ultrasonic wave transit time, a pulse-echo overlap system capable of detecting changes in ultrasonic transit time in these ceramic specimens to 1 part in 105, was used... Temperature dependences of ultrasonic wave velocity were measured in a closed-cycle refrigerator... The temperature was changed at a rate of about 0.4 K/min during both cooling and warming cycles. A study of the pressure dependence of the sound velocity was made at room temperature (290 K) with an apparatus in which hydrostatic pressures up to 0.15 GPa were applied to the samples of a piston and cylinder arrangement that used silicone oil as the pressure-transmitting medium. Pressure was measured with a precalibrated manganin resistance gauge."

Cautions: Evaluated Data
Digitized data were obtained from Figures 2 and 3 of the paper.