Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Synthesis and Optical Property of GaN Powder Using an Ultrasonic Spray Pyrolysis Process and Subsequent Nitridation Treatment

초음파 분무 열분해 공정과 질화처리를 이용한 GaN 분말의 합성과 광학적 성질

  • Ji, Myeong-Jun (Department of Materials Science and Engineering, Seoul National University of Science and Technology) ;
  • Yoo, Jae-Hyun (Department of Materials Science and Engineering, Seoul National University of Science and Technology) ;
  • Lee, Young-In (Department of Materials Science and Engineering, Seoul National University of Science and Technology)
  • 지명준 (서울과학기술대학교 신소재공학과) ;
  • 유재현 (서울과학기술대학교 신소재공학과) ;
  • 이영인 (서울과학기술대학교 신소재공학과)
  • Received : 2018.12.04
  • Accepted : 2018.12.19
  • Published : 2018.12.28
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Abstract

Despite numerous advances in the preparation and use of GaN, and many leading-edge applications in lighting technologies, the preparation of high-quality GaN powder remains a challenge. Ammonolytic preparations of polycrystalline GaN have been studied using various precursors, but all were time-consuming and required high temperatures. In this study, an efficient and low-temperature method to synthesize high-purity hexagonal GaN powder is developed using sub-micron $Ga_2O_3$ powder as a starting material. The sub-micron $Ga_2O_3$ powder was prepared by an ultrasonic spray pyrolysis process. The GaN powder is synthesized from the sub-micron $Ga_2O_3$ powder through a nitridation treatment in an $NH_3$ flow at $800^{\circ}C$. The characteristics of the synthesized powder are systematically examined by X-ray diffraction, scanning and transmission electron microscopy, and UV-vis spectrophotometer.

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References

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