Abstract

The effect of reaction temperature on fine particle formation of basic yttrium carbonate by the homogenous precipitation method was studied. The average size of the particles precipitated at 77°C was 291 nm, but the size distribution was broad. The average size of precipitates at 87 °C was larger, 605 nm, and in addition, they had broader distribution in size. On the other hand, the average size of the particles precipitated at 97 °C was finer, 304 nm, than that of the precipitates at 87 °C and the size distribution was fairly narrow. The finer precipitates with narrow size distribution at 97 °C were possibly obtained due to more rapid generation of more plentiful precipitants caused by the decomposition of urea.

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