Growth, Structural, Optical, Mechanical and Dielectric Characterization of Diammonium Hydrogen Phosphate (DAHP) Single Crystals

P. Selvarajan, N. Joseph John, C.K. Mahadevan

Department of Physics, Aditanar College of Arts and Science, Tiruchendur-628216, India..
Department of Physics, Malankara Catholic College, Mariagiri, Tamil Nadu- 629153, India.
Physcis Research Centre, S.T. Hindu College, Nagercoil-629003, Tamil Nadu, India..

DOI: 10.4236/jmmce.2011.1015108                

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.

Keywords

Optical Materials; Solubility; Crystal Growth; XRD; hardness; dielectricconstant; SHG;

Conflicts of Interest

The authors declare no conflicts of interest.

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