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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: Elastic Moduli for Three Superconducting Phases of Bi-Sr-Ca-Cu-O
Author(s): J. Dominec, P. Vasek, P. Svoboda, V. Plechacek, and C. Laermans
Publication: Modern Physics Letters B Volume: 6 Issue: 16 Year: 1992 Page(s): 1049-1054
Editor(s): Not Available
Publisher: World Scientific Publishing Company
Language: English
Notes: Not Available
Keywords: Material Specification, Density (mass), Critical Temperature, Debye Temperature, Elastic Modulus, Shear Modulus, Poisson's Ratio, Sound Velocity

Materials and Properties

Bi:221; [Bi-Sr-Ca-Cu-O]
Material Specification for Bi:221; [Bi-Sr-Ca-Cu-O] Process: Solid State Reaction
Notes: "... compounds (were) prepared by the standard powder metallurgical method using, as initial reagents, Bi, Pb and Cu oxides and Sr and Ca carbonates. The starting compositions followed the 2201, 2212, and 2223 stoichiometric formulae; in the latter case 10% of Bi were substituted by Pb to form the 2223 phase easy. After calcination and, in the case of 2212 and 2223 phase, after subsequent heating to enrich the materials with the desirable superconducting phase, the powders were compacted. Uniaxial or hydrostatical pressing was applied to form or suppress the c-axis texture, respectively. Selection of the pressing as well as of the heating parameters made the production of the 2223 samples of different density possible. Finally, the samples were sintered under suitable conditions, so that the single- or nearly single-phase samples... superconductors could be prepared." 
Phase  Sample    Pressure (MPa)    Sintering Conditions
----   ------    ---------------   --------------------
2201   A         350 uniaxial      690 °C/  16 h/ air
2201   B         300 hydrostatic   690 °C/  16 h/ air
2212   A         350 uniaxial      863 °C/  16 h/ air
2223   B         300 uniaxial      830 °C/ 128 h/ 7% O2
2223   C         800 uniaxial      830 °C/  64 h/ 7% O2
2223   D         800 hydrostatic   830 °C/ 128 h/ 7% O2
Formula: Bi2Sr2Cax-1CuxO2x+4
Informal Name: Bi:221
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:221; [Bi-Sr-Ca-Cu-O]
Phase () Sample Number () Theoretical Density (g/cm3) Density (g cm-3)
2201 A 7.154 5.04
2201 B 7.154 5.36
2212 A 6.527 4.83
2223 B 6.313 4.68
2223 C 6.313 5.40
2223 D 6.313 5.67
Measurement Method: Density methods
"... the real density and the density calculated from lattice parameters (were reported)." No additional measurement details were noted.

Cautions: Unevaluated Data
Critical Temperature for Bi:221; [Bi-Sr-Ca-Cu-O]
Phase () Sample Number () Tc(magnetic) (K) Critical Temperature (K)
2201 A <4.2 8.2
2201 B 4.8 9.1
2212 A 78.5 85.3
2223 B 104.0 104.2
2223 C 104.5 108.8
2223 D 106.5 109.3
Measurement Method: Ac susceptibility
"Tc is determined from ac susceptibility... and resistivity... measurement." No additional measurement details were noted.

Cautions: Unevaluated Data
Debye Temperature for Bi:221; [Bi-Sr-Ca-Cu-O]
Phase () Sample Number () Debye Temperature (K)
2201 A 192
2201 B 214
2212 A 241
2223 B 265
2223 C 282
2223 D 307
Measurement Method: Pulse-echo method
The authors cite H.J. McSkimin, J. Acoust. Soc. Am., Vol. 33, 12 (1961), and summarize the procedure as follows. "We have measured the longitudinal and the shear sound velocities at 4.2 K by the pulse-echo-overlap method... We used 5 MHz or 7 MHz quartz transducers at the basic frequency. Nonaq grease has been used as the contact medium between sample and transducer... Under our conditions of the experiment... the error resulting from an improper overlap can amount (typically) to +4%, 0%, or -4% (it is quantized). Such a small error (if it exists), projected into the values of material parameters, results in rather large uncertainties in final values reading up to tens of percent in the values of bulk and shear moduli, and more than fifty percent in the values of Poisson's number."

Cautions: Evaluated Data
Elastic Modulus for Bi:221; [Bi-Sr-Ca-Cu-O]
Phase () Sample Number () Elastic Modulus (GPa)
2201 A 35.2
2201 B 43.4
2212 A 40.0
2223 B 53.9
2223 C 53.2
2223 D 66.8
Measurement Method: Pulse-echo method
The authors cite H.J. McSkimin, J. Acoust. Soc. Am., Vol. 33, 12 (1961), and summarize the procedure as follows. "We have measured the longitudinal and the shear sound velocities at 4.2 K by the pulse-echo-overlap method... We used 5 MHz or 7 MHz quartz transducers at the basic frequency. Nonaq grease has been used as the contact medium between sample and transducer... Under our conditions of the experiment... the error resulting from an improper overlap can amount (typically) to +4%, 0%, or -4% (it is quantized). Such a small error (if it exists), projected into the values of material parameters, results in rather large uncertainties in final values reading up to tens of percent in the values of bulk and shear moduli, and more than fifty percent in the values of Poisson's number."

Cautions: Evaluated Data
Shear Modulus for Bi:221; [Bi-Sr-Ca-Cu-O]
Phase () Sample Number () Shear Modulus (GPa)
2201 A 15.7
2201 B 19.4
2212 A 22.5
2223 B 24.7
2223 C 28.6
2223 D 33.5
Measurement Method: Pulse-echo method
The authors cite H.J. McSkimin, J. Acoust. Soc. Am., Vol. 33, 12 (1961), and summarize the procedure as follows. "We have measured the longitudinal and the shear sound velocities at 4.2 K by the pulse-echo-overlap method... We used 5 MHz or 7 MHz quartz transducers at the basic frequency. Nonaq grease has been used as the contact medium between sample and transducer... Under our conditions of the experiment... the error resulting from an improper overlap can amount (typically) to +4%, 0%, or -4% (it is quantized). Such a small error (if it exists), projected into the values of material parameters, results in rather large uncertainties in final values reading up to tens of percent in the values of bulk and shear moduli, and more than fifty percent in the values of Poisson's number."

Cautions: Evaluated Data
Poisson's Ratio for Bi:221; [Bi-Sr-Ca-Cu-O]
Phase () Sample Number () Poisson's Ratio (no unit)
2201 A 0.12
2201 B 0.12
2212 A -0.11
2223 B 0.09
2223 C -0.07
2223 D 0.00
Measurement Method: Pulse-echo method
The authors cite H.J. McSkimin, J. Acoust. Soc. Am., Vol. 33, 12 (1961), and summarize the procedure as follows. "We have measured the longitudinal and the shear sound velocities at 4.2 K by the pulse-echo-overlap method... We used 5 MHz or 7 MHz quartz transducers at the basic frequency. Nonaq grease has been used as the contact medium between sample and transducer... Under our conditions of the experiment... the error resulting from an improper overlap can amount (typically) to +4%, 0%, or -4% (it is quantized). Such a small error (if it exists), projected into the values of material parameters, results in rather large uncertainties in final values reading up to tens of percent in the values of bulk and shear moduli, and more than fifty percent in the values of Poisson's number."

Cautions: Evaluated Data
Sound Velocity for Bi:221; [Bi-Sr-Ca-Cu-O]
Phase () Sample Number () Mode () Sound Velocity (km/s)
2201 A Longitudinal 1.999
2201 A Shear 1.293
2201 B Longitudinal 2.256
2201 B Shear 1.462
2212 A Longitudinal 2.241
2212 A Shear 1.620
2223 B Longitudinal 2.653
2223 B Shear 1.747
2223 C Longitudinal 2.736
2223 C Shear 1.967
2223 D Longitudinal 3.111
2223 D Shear 2.181
Measurement Method: Pulse-echo method
The authors cite H.J. McSkimin, J. Acoust. Soc. Am., Vol. 33, 12 (1961), and summarize the procedure as follows. "We have measured the longitudinal and the shear sound velocities at 4.2 K by the pulse-echo-overlap method... We used 5 MHz or 7 MHz quartz transducers at the basic frequency. Nonaq grease has been used as the contact medium between sample and transducer... Under our conditions of the experiment... the error resulting from an improper overlap can amount (typically) to +4%, 0%, or -4% (it is quantized). Such a small error (if it exists), projected into the values of material parameters, results in rather large uncertainties in final values reading up to tens of percent in the values of bulk and shear moduli, and more than fifty percent in the values of Poisson's number."

Cautions: Evaluated Data