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In situ measurement of growth kinetics of {100} KDP crystal faces in the presence of polyphosphate impurities

✍ Scribed by Bing Liu; Chang-Shui Fang; Sheng-Lai Wang; Xiao-Ming Mou

Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
335 KB
Volume
43
Category
Article
ISSN
0232-1300

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✦ Synopsis

Abstract

The face growth rate and critical supersaturation of {100} face were in situ measured using the laser‐polarization‐interference technique in the presence of potassium pyrophosphate, trimetric sodium phosphate and sodium hexametaphosphate impurities. The polyphosphate impurities inhibit the growth rate of prismatic faces. The face growth rate as a function of supersaturation at different impurity concentrations, as well as critical supersaturation as a function of impurity concentrations, was found in good agreement with a two‐dimensional nucleation model in the pure system and Kubota and Mullin's model in the presence of impurities. The average distance L between active sites available for impurity adsorption as well as the edge free energy was calculated. (Β© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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