HEATER FOR RETROGRADE SOLVOTHERMAL CRYSTAL GROWTH, METHOD OF MAKING, AND METHOD OF USE
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United States of America Patent
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Issued Date -
Apr 13, 2023
app pub date -
Oct 10, 2022
filing date -
Oct 11, 2021
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Abstract
Embodiments of the disclosure an apparatus for solvothermal crystal growth, comprising: a pressure vessel having a cylindrical shape and a vertical orientation; a cylindrical heater having an upper zone and a lower zone that can be independently controlled; at least one end heater; and an inward-facing surface of a baffle placed within 100 millimeters of a bottom end or top end surface of the growth chamber. The end heater is configured to enable: a variation in the temperature distribution along a first surface to be less than about 10° C., and a variation in the temperature distribution along a second surface to be less than about 20° C., during a crystal growth process. The first surface has a cylindrical shape and is positioned within the pressure vessel, and the second surface comprises an inner diameter of the growth chamber, and the temperature distribution along the second surface is created within an axial distance of at least 100 millimeters of an end of the growth chamber proximate to the first surface.
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