Title of article :
Optical, structural and microhardness properties of KDP crystals grown from urea-doped solutions
Author/Authors :
Pritula، نويسنده , , I. and Kosinova، نويسنده , , A. and Kolybayeva، نويسنده , , M. and Puzikov، نويسنده , , V. and Bondarenko، نويسنده , , S. and Tkachenko، نويسنده , , V. and Tsurikov، نويسنده , , V. and Fesenko، نويسنده , , O.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2008
Abstract :
Potassium dihydrophosphate single crystals were grown from aqueous solutions onto a point seed using temperature reduction method by doping with different molar values of urea. The characterization of the grown crystals was made by visible and Fourier transform infrared spectroscopy, Vickerʹs hardness studies, X-ray powder diffraction, non-linear optical and laser damage threshold measurements. By comparing these crystals with the ones grown from the pure solution, it is shown that 0.2–2.0 M of the urea additive enhances the laser damage threshold and the second harmonic efficiency more than by 25 and 20%, respectively. By means of the Bond method using a multipurpose three-crystal X-ray diffractometer it is shown that the presence of urea additive increases the crystal lattice parameter c of the grown crystals, whereas the lattice parameter a is by an order less sensitive to the changing urea concentration in the solution. The Vickerʹs hardness studies at room temperature carried out on (1 0 0) and (0 0 1) crystallographic planes show an increased hardness of the doped crystals (grown in the presence of urea additive) on the plane (0 0 1) in comparison with that of pure potassium dihydrophosphate crystal.
Keywords :
D. Optical properties , A. Optical materials , B. Crystal growth , C. X-ray diffraction , D. Mechanical properties
Journal title :
Materials Research Bulletin
Journal title :
Materials Research Bulletin