Abstract

The growth rate of barium strontium niobate and nickel ferrite crystals from borate fluxes was determined by a thermogravimetric method. In the case of the Ba0.5Sr0.5Nb2O6 crystals the growth rate varies as the square of the supersaturation, as predicted by the BCF screw dislocation theory. The data for nickel ferrite shows a linear variation which is believed to be controlled by boundary layer diffusion.

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