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

The Korea Association of Crystal Growth (한국결정성장학회)
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Study on self-diffusion transport phenomena during mercurous bromide (Hg2Br2) vapor processes

브로민화수은(I)(Hg2Br2) 증착공정에서 자체확산 연구

  • Nam Il Kim (Department of Chemical Engineering, Hannam University) ;
  • Geug Tae Kim (Department of Chemical Engineering, Hannam University)
  • 김남일 (한남대학교 화학공학과) ;
  • 김극태 (한남대학교 화학공학과)
  • Received : 2024.02.15
  • Accepted : 2024.03.11
  • Published : 2024.04.30
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Abstract

During the Hg2Br2 physical vapor transport process with self-diffusion, it is concluded that for 10-3g0≤ g ≤ 1g0 the thermal buoyancy driven convection is dominant in the vapor phase; at the gravitational level of g = 10-4g0, the transition region from the convection to diffusion occurs; for 10-6g0 ≤ g ≤ 10-5g0, the diffusion mode is predominant. The total molar flux of Hg2Br2 decays exponentially with the decreasing of one tenth of gravitational magnitude. For 10℃ ≤ ΔT ≤ 50℃, the total molar flux increases linearly and directly with the temperature difference between the source and crystal regions.

브로민화 수은(I)(Hg2Br2) 자체 확산 물리적 증착법 공정에서 자체 확산 전달현상 연구에서 얻어진 결론은 10-3g0 ≤ g ≤ 1g0 영역에서는 열 대류현상이 지배적이며, g = 10-4g0 영역에서는 대류에서 확산영역으로 전이되는 영역이며, 10-6g0 ≤ g ≤ 10-5g0 영역에서는 확산모드가 지배적이다. Hg2Br2의 총 몰플럭스는 중력가속도의 레벌(level)이 1/10 크기로 감소함에 따라 기하급수적으로 감소함을 나타내고 있다는 것이다. 10℃ ≤ ΔT ≤ 50℃의 온도차 범위에서는 온도차(ΔT)와 Hg2Br2의 총 몰플럭스에 대한 관계식은 선형적으로 직선적 비례관계성을 보여주고 있다.

Keywords

Acknowledgement

본 연구는 2023년도 한남대학교 학술연구비(과제번호: 2023A107)의 지원을 받아 수행되었습니다.

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