• Title/Summary/Keyword: 나노분말 합성

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Low temperature synthesis of $ZnWO_4$ nanopowders using polymeric complex precursor (착체중합법에 의한 $ZnWO_4$ 나노분말의 저온합성)

  • 류정호;임창성;오근호
    • Journal of the Korean Crystal Growth and Crystal Technology
    • /
    • v.12 no.3
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    • pp.133-137
    • /
    • 2002

  • $ZnWO_4$ nano-powders were successfully synthesized at low temperature by polymerized complex method using zinc acetate and tungstic acid as starting materials. The polymeric precursors were heat-treated at temperatures from 300 to $600^{\circ}C$ for 3 h. The precursors and heat-treated powders were evaluated for crystallization process, thermal decomposition, surface morphology and crystallite size. Crystallization of the $ZnWO_4$ powders were detected at $400^{\circ}C$ and entirely completed at a temperature of $600^{\circ}C$. The particles heat-treated at $400^{\circ}C$ showed primarily co-mixed morphology with spherical and silk-worm-like forms, while the particles heat-treated at $500^{\circ}C$ showed more homogeneous morphology. The average crystalline sizes were 17.62~24.71 nm showing an ordinary tendency to increase with the temperatures from 400 to $600^{\circ}C$.

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