Crystal Research and Technology
Cryst. Res. Technol. 35 (2000) 177 - Abstract -

Y.-J. Fu, Z.-S. Gao, S.-L. Wang, Y.-P. Li, H. Zeng, Ai-D. Duan, J.-P. Luo

State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University, Jinan, PR China

Study on K(DxH1-x)2PO4 Crystals: Growth Habit, Optical Properties and their Improvement by Thermal-Conditioning

Phosphite, which often exists in growth solutions obtained directly from commercial P2O5 , was found to have significant inhibiting effects on the growth of pyramidal face of KDP crystals. K(DxH1-x)2PO4 (referred to as DKDP) crystals with different deuterium fraction x were grown and the optical performances were investigated. The absorption coefficients at 1.05 µm decreases monotonically with the increase of x. The transmission threshold shift from 1.65µm at x=0 to 2.10 µm at x=0.96. The high temperature phase transition temperature and latent heat were measured using the method of differential scanning calorimetry (DSC). Thermal conditioning experiments were carried out at 180°C and 140°C for KDP and DKDP, respectively. After conditioning, a different degree of improvement was observed in the optical homogeneity of the samples, while the laser damage threshold and light absorption coefficient showed no significant change.

Keywords: potassium dihydrogen phosphate, thermal conditioning, differential scanning calorimetry


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