JMMCE  Vol.10 No.15 , December 2011
Growth, Structural, Optical, Mechanical and Dielectric Characterization of Diammonium Hydrogen Phosphate (DAHP) Single Crystals
Abstract: Solubility studies of Diammonium Hydrogen Phosphate(DAHP) in de-ionized water were performed at various temperatures in the range 30-50 °C. Single crystals of DAHP were grown from aqueous solutions by slow evaporation technique. Structural characterization of the grown crystals has been carried out by powder and single crystal X-ray diffraction (XRD) methods. DAHP crystals crystallize in monoclinic structure with the space group P21/c. Second harmonic generation (SHG) for the material of this work was confirmed using Nd: YAG laser. The UV-Visible spectrum show that the grown crystals have wide optical transparency in the entire visible region. The dielectric measurements were made for grown DAHP crystal at the frequencies of 100 Hz and 1 KHz and in the temperature range 30-150 °C. Vickers microhardness value of DAHP crystal is found to increase with increase in load. Value of density of the grown DAHP crystal has been measured and it is well matched with the data of XRD studies.
Cite this paper: P. Selvarajan, N. John and C. Mahadevan, "Growth, Structural, Optical, Mechanical and Dielectric Characterization of Diammonium Hydrogen Phosphate (DAHP) Single Crystals," Journal of Minerals and Materials Characterization and Engineering, Vol. 10 No. 15, 2011, pp. 1379-1389. doi: 10.4236/jmmce.2011.1015108.

[1]   S.B. Monaco, L.E. Davis, S.P. Velsko, F.T. Wang, D. Eimerl, A.J. Zalkin J. Crystal Growth 85 (1987) 252.

[2]   K. Meera, R. Muralidharan, R. Dhanasekaran, Prapun Manyum, P. Ramasamy J. Crystal Growth 263 (2004) 510.

[3]   C. Justin Raj, S. Dinakaran, S. Krishnan, B. Milton Boaz, R. Robert, S. Jerome Das Optics Commun. 281 (2008) 2285.

[4]   K. Ambujam , K. Rajarajan , S. Selvakumar , J. Madhavan, Gulam Mohamed , P. Sagayaraj Optical Mater. 29 (2007) 657.

[5]   M.Gunasekaran, N.Vijayan, R.Ramesh Babu, R.Gopalakrishnan, P.Ramasamy J. Crystal Growth 244(2002) 194.

[6]   N.Joseph John, P.Selvarajan, S. Sylvia, C.K.Mahadevan Mat.Manufact.Process. 22 (2007) 379.

[7]   R.Navil Kumar and C.P.G. Vallaban J.Phys.Condens. Matter 1(1989) 6095.

[8]   J.P.Smith, J.R.Lehr, W.E.Brown Acta Crystallogr. 10 (1957) 50.

[9]   A.A.Khan, J.P.Roux, W.J.James Acta Crystallogr. B28(1978) 2065.

[10]   A.Watton, E.C.Reynhardt, H.S. Sandhu, H.E.Petch J.Chem. Phys. 67(1977)887.

[11]   G.Goobes , Vinodhkumar Raghunathanm Elizabeth A.Louie, James M.Gibson, Gregory L. Olsen, Gary P.Drobny Sold State Nucl. Mag. Resonance 29(2006) 242.

[12]   P. Selvarajan, A. Siva dhas , T.H. Freeda, C.K. Mahadevan, Physica B 403(2008)4205.

[13]   S.K. Kurtz , T.T. Perry J.Appl. Phys.39 (1968) 3798.

[14]   C. Krishnan, P. Selvarajan, T.H. Freeda J. Crystal Growth 311 (2008)141.

[15]   K.Kishan Rao, V.Surender and B.Saritha Rani Bull.Mater.Sci. 25(2002)641.

[16]   C. Krishnan , P. Selvarajan , T.H. Freeda , C.K. Mahadevan Physica B 404 (2009) 289.

[17]   S. Krishnan, C. Justin Raj, S. M. Navis Priya, R. Robert, S. Dinakaran, and S. Jerome Das Cryst. Res. Technol. 43, No. 8 (2008) 845.

[18]   H. Lipson, H. Steeple, Interpretation of X-ray powder Diffraction Patterns, Fifth Ed, Macmillan, NewYork (1970) , p.165.

[19]   J.A.Dean, Lange’s Hand book of Chemistry, 12th edn., McGraw Hill , New York (1979), p.4-16.

[20]   T. Balakrishnan, K. Ramamurthi Spectrochimica Acta Part A 72 (2009) 269.

[21]   J.B. Charles, F.D. Gnanam J. Mater. Sci. Lett. 12 (1993) 1395.

[22]   N. Theresita Shanthi, P. Selvarajan, C.K. Mahadevan, Curr. Appl. Phys. 9(2009)1155.

[23]   K. V. Rao and A. Smakula J. Appl. Phys. 36(1965) 2031.

[24]   P. Selvarajan, B.N. Das, H.B. Gon and K.V. Rao, J. Mater. Sci. 29 (1994) 4061