Abstract
AbstractInduction periods (t) and mechanism and kinetics of nucleation in barium tungstate crystallization from sodium tungstate melts in platinum crucibles were studied. A theoretical relation has been developed to express the dependence of t on the cooling rates (RT) and the rate (Rc) of development of excess solute concentration. At any crystallization temperature the average rate‐constant (kn) for heterogeneous nucleation was related to Rc by (kn/p)1/(p+1) = 1/(tRcγ), where γ is a constant and p is the average number of particles in the critical nuclei. The critical temperature (T), critical supersaturation (S) and γ values were estimated.
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