Abstract
A new technique for growing oxide mixed crystals was developed by using a die with multi-capillary holes immersed in the melt. Using this technique, (Li x Na 1− x )NO 3 mixed crystals with x = 0.01, 0.05 and 0.1 were grown as a model system, and a uniform longitudinal composition was obtained as measured by electron microprobe analysis (EMPA). From quenching experiments during growth, the compositional variation of the molten zone was measured and no back diffusion of solute through the multi-capillary holes was found. The advantage of using a thin molten zone was a reduction of constitutional supercooling of the molten zone at a given velocity compared with the conventional process of unidirectional solidification and the avoiding of complex thermosolutal transport which is a characteristic of non-dilute mixed crystal growth.
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