Abstract
Pure and Mn-doped willemite, Zn2SiO4 of different morphologies and particle sizes were prepared with and without NH4OH under different hydrothermal conditions. Pure willemite was synthesized at a temperature as low as 165 °C using autogeneous pressure. The nature of the anion, silica source and the NH4OH∶Zn2+ ratio played an important role in the size and morphology of the willemite phase. The presence of SO 2−4 anions resulted in mainly equiaxed grains. Such powders are expected to be good for consolidation and in the processing of phosphors.
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Li, Q.H., Komarneni, S. & Roy, R. Control of morphology of Zn2SiO4 by hydrothermal preparation. J Mater Sci 30, 2358–2363 (1995). https://doi.org/10.1007/BF01184587
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DOI: https://doi.org/10.1007/BF01184587