Effects of Convective Flow Fields on the Physical Vapor Transport Processes of $Hg_2Cl_2$ Crystals

염화제일수은 승화법 단결정 성장 공정에서의 대류 현상 연구

  • Park, Jang-Woo (Department of Chemical Engineering, Hannam University) ;
  • Kim, Geug-Tae (Department of Chemical Engineering, Hannam University) ;
  • M.E. Glicksman (Materials Engineering Department, Rensselaer Polytechnic Institute)
  • Published : 1997.10.01


Mercurous chloride (Hg$_2$Cl$_2$) has many advantages in its applications to acousto-optic, and opto-electronic devices because it has the unique properties of a broad transmisson range, well into the far infra-red, a low acoustic velocity, a large birefringence, and a high acousto-optic figure of merit[1]. Hg$_2$Cl$_2$ has a high vapor pressure, hence single crystals are usually grown by physical vapor transport(PVT) method in closed silica glass ampoules. We discuss the application of the laser Doppler velocimetry to measure the flow field inside a closed ampoule. The experimental results, are discussed its relationship to computational model and compared to their expectations.