Share This Article:

Measurement of Elastic Parameters of Lithium Hydroxylammonium Sulphate Single Crystal, by Ultrasonic Pulse Echo Overlap Technique

Abstract Full-Text HTML Download Download as PDF (Size:2570KB) PP. 138-144
DOI: 10.4236/oja.2014.43014    1,999 Downloads   2,528 Views  

ABSTRACT

Ultrasonics is the most established and precise technique to determine the elastic parameters of materials. Elastic constants are important parameters of a crystal which provide valuable infor-mation about the bonding characteristic between adjacent atomic planes and the anisotropic cha-racter of the bonding and structural ability. Second order elastic constants can be measured by measuring the velocity of the ultrasonic pulses of different polarization along different symmetry directions. Elastic Constants of Lithium Hydroxylammonium Sulphate [LHAS] single crystal by ul-trasonic Pulse Echo Overlap [PEO] technique are reported for the first time. Large single crystals of LHAS of size [26×26×10]  mm3 have been grown from supersaturated aqueous solution of the salt by slow evaporation technique over a period of 40 - 45 days at 305 K. Absolute velocities at room temperature (303 K) have been measured for the selected direction and modes with McSkimin criterion. The anisotropy in the elastic properties of LHAS is well studied by measuring ultrasonic velocity in the crystal in certain specified crystallographic directions. The elastic stiffness constants C11, C33, C44, C55, and C66, and Acoustic impedance constants and Rao’s constants in specified directions are evaluated.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

Varughese, G. and Kumar, S. (2014) Measurement of Elastic Parameters of Lithium Hydroxylammonium Sulphate Single Crystal, by Ultrasonic Pulse Echo Overlap Technique. Open Journal of Acoustics, 4, 138-144. doi: 10.4236/oja.2014.43014.

References

[1] Vilminot, S., Anderson, M.R. and Brown, D. (1973) The Crystal Structure of Lithium Hydroxylammonium Sulphate. Acta Crystallographica, B29, 2628. http://dx.doi.org/10.1107/S056774087300720X
[2] Brown, I.D. (1964) The Crystal Structure of Lithium Hydrazinium Sulfate. Acta Crystallographica, 17, 654-660.
http://dx.doi.org/10.1107/S0365110X64001591
[3] Anderson, M.R., Brown, I.D. and Vilminot, S. (1973) The Crystal Structure of Lithium Hydrazinium Fluoroberyllate. Acta Crystallographica, B29, 2625-2627. http://dx.doi.org/10.1107/S0567740873007193
[4] Chung, S.J. and Hahn, T. (1972) Tetrahedral-Framework Structures of NH4LiBeF4 and CsLiBeF4. Materials Research Bulletin, 7, 1209-1217. http://dx.doi.org/10.1016/0025-5408(72)90100-6
[5] Mahadevan Pillai, V.P. and Pradeep, T. (1992) Vibrational Spectra of LiNH3OHSO4 and LiND3ODSO4. Journal of Raman Spectroscopy, 23, 235-237. http://dx.doi.org/10.1002/jrs.1250230408
[6] JCPDS Card No: 29-792 (1976).
[7] Truell, R., Elbaum, C. and Chick, B.B. (1969) Ultrasonic Methods in Solid State Physics, Academic Press, New York, 370. http://dx.doi.org/10.1016/B978-1-4832-3318-5.50003-1
[8] Nye, N.F. (1957) Physical Properties of Crystals. Oxford Univ. Press, London, 145.
http://www.mediafire.com/?3wx2faaheaepkyx
[9] Papadakis, E.P. (1967) Ultrasonic Pulse Velocity by the Pulse-Echo Overlap Method Incorporating Diffraction Phase Correlation. The Journal of the Acoustical Society of America, 42, 1045.
[10] Papadakis, E.P. (1976) Ultrasonic Velocity and Attenuation: Measurement Methods with Scientific and Industrial Applications. In: Mason, W.P. and Thurston, R.N., Eds., Physical Acoustics: Principles and Methods, Academic Press, New York, 227-374.
[11] Ali, A. and Nain, A.K. (1996) Ultrasonic Study of Molecular Interactions in N, N-Dimethylacetamide+ Ethanol Binary Mixtures at Various Temperatures. Acoustics Letters, 19, 181-187.
[12] Godfrey, L., Philip, J. and Sebastian, M.T. (1994) Elastic Constants and High-Temperature Elastic Anomalies near 425 K in Lithium Hydrazinium Sulfate. Journal of Applied Physics, 75, 2393.
[13] May Jr., J.E. (1958) Circuit Theory; Ultrasonic engineering. IRE National Convention Record, 6, 134-142.
[14] McSkimin, H.J. (1961) Pulse Superposition Method for Measuring Ultrasonic Wave Velocities in Solids. The Journal of the Acoustical Society of America, 33, 12. http://dx.doi.org/10.1121/1.1908386
[15] McSkimin, H.J. and Andreatch, P. (1962) Analysis of the Pulse Superposition Method for Measuring Ultrasonic Wave Velocities as a Function of Temperature and Pressure. The Journal of the Acoustical Society of America, 34, 609.
http://dx.doi.org/10.1121/1.1918175
[16] McSkimin, H.J. (1964) Ultrasonic Methods for Measuring the Mechanical Properties of Liquids and Solids. In: Mason, W.P., Ed., Physical Acoustics, Academic Press, New York, 271.
[17] Godfrey, L. and Philip, J. (1995) Numerical Technique for Bond Correction in Ultrasonic Measurements. Acoustics Letters, 19, 111-114.

  
comments powered by Disqus

Copyright © 2019 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.