Journal of the Korean Crystal Growth and Crystal Technology (한국결정성장학회지)

The Korea Association of Crystal Growth (한국결정성장학회)
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A study on the growth behavior of nano NiO crystals synthesized by a solid state reaction

고상반응에 의한 NiO 나노 결정의 성장거동에 관한 연구

  • Published : 2009.08.31
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Abstract

We characterized the growth behavior of nano NiO crystals synthesized by heat-treatment in air at the elevated temperatures using nickel nitrate ($Ni(NO_3)_2{\cdot}6H_2O$). The crystals had the octahedral shape and the length of 200${\sim}$500 nm. The truncation was observed when the NiO powder was heated up to $900^{\circ}C$ for 2 hours. but not be seen at under $600^{\circ}C$. It was observed that nano NiO crystals synthesized at $900^{\circ}C$ made up the networks, the coalescence of the nano crystals through the neck formation between the crystals appeared as the first stage in the sintering mechanism.

$Ni(NO_3)_2{\cdot}6H_2O$를 원료로 하여 고온에서 열처리함으로써 얻어진 NiO 나노 결정의 성장거동에 대하여 고찰하였다. 성장된 결정의 상은 정 8면체의 구조를 갖고 있었으며, 200${\sim}$500 nm 크기로 성장하였다. $900^{\circ}C$에서 2시간 동안 열처리하였을 때, $600^{\circ}C$ 이하의 열처리 온도에서 나타나지 않았던 (110)과 (100) facet이 생성되는 것을 관찰할 수 있었다 또한 $900^{\circ}C$ 열처리에서는, $600^{\circ}C$ 이하의 온도에서 열처리 한 시료보다 크기가 작은 결정상이 neck을 형성하면서 성장하였음을 관찰하였다.

Keywords

References

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