Studying Nucleation Rate Constant of Ammonium Paratungstate

According to Arrhenius theory, using the method of nucleation period integral mean rate, the apparent activation energy of ammonium paratungstate(APT) crystal growth is calculated as 94.657kJ/mol. At the same time,the ralational expression between APT crystal growth rate constant and temperature is concluded as kn=8.46×1014exp(-94657/RT).The results show that the increasing rate of APT nucleation rate is bigger than that of APT crystal growth rate as temperature increasing and the granularity of crystal product is fine.

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