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Student Number 83321018
Author Tsai, Hsiang Pha(y)
Author's Email Address No Public.
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Department Chemical and Materials Engineering
Year 1995
Semester 2
Degree Master
Type of Document Master's Thesis
Language zh-TW.Big5 Chinese
Title The design, manfacture, and simulation of ellipsoid mirror furnaces and their applications in the processing of high- temperature materials
Date of Defense
Page Count 92
Keyword
  • computer simulation
  • crystal growth
  • ellipsoid mirror furnace
  • floating-zone
  • thermocapillary phenomena
  • Abstract Because of its compactness and hight heating efficiency, the
    double ellipsoid mirror furnace (DEMF) has been widely used in
    the processing of hight-temperature materials,particularly, the
    applications in floating zone (FZ) crystal growth. However,
    detail heat flux distribution, and thus the temperature
    distribution in the sample, in the DEMF is not well understood.
    In the present study, a simple model is proposed to describe the
    energy distribution in the DEMF. The effects of lamp size,
    orientation, and defocusing  can all be considered. This model
    is also consistent with the point-lamp model as the lamp size is
    diminished. The model is futher integrated with a three-
    dimensional thermal-capillary FZ model. The effects of various
    lamp configurations on temperature distribution and the zone
    shape are illustrated. In addition to simulation, a DEMF for FZ
    crystal growth is designed and manufactured. Rutile single
    crystals are successfully grown in the home-made system.
    Futhermore, the axial temperature measurements of a graphite rod
    in the system are futher compared with calculated ones.
    Table of Content
    Reference
    Advisor
  • C.W. Lan(űR)
  • Files No Any Full Text File.
    Date of Submission

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