Patent
Method for reducing residual stresses in crystals
TLDR
In this article, a temperature profile controller is provided for cooling a crystal as it is pulled from a melt so that a substantially linear temperature gradient is established and maintained along the length of the crystal, whereby to prevent or reduce the occurrence of residual stresses in the crystal.Abstract:
A temperature profile controller is provided for cooling a crystal as it is pulled from a melt so that a substantially linear temperature gradient is established and maintained along the length of the crystal as it is cooled, whereby to prevent or reduce the occurrence of residual stresses in the crystal.read more
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Patent
C-plane sapphire method and apparatus
TL;DR: A method and apparatus for the production of C-plane single crystal sapphire is described in this article, which may use edge defined film-fed growth techniques for the synthesis of single crystal material exhibiting low polycrystallinity and/or low dislocation density.
Patent
Single crystals and methods for fabricating same
TL;DR: In this paper, a number of single crystals including sapphire have been shown to have desirable geometric properties, including a width not less than about 15 cm and a thickness not more than about 0.5 cm.
Patent
Crystal growth apparatus
Aaron S. Taylor,White Vernon E +1 more
TL;DR: In this paper, a tiltable heat shield is proposed for controlling the temperature of the top surface of the capillary die and the adjacent meniscus during growth of a crystalline body.
Patent
Apparatus and methods of growing void-free crystalline ceramic products
TL;DR: In this article, a method and apparatus for eliminating voids and improving crystal quality in shaped ceramic product, e.g., sapphire fiber or silicon sheet, from a melt by using a sloped die tip is presented.
Patent
Heat transfer control during crystal growth
TL;DR: In this article, the heat transfer from the surface of a crystal during crystal growth is controlled by surrounding the crystal with plural coaxial heat transfer modules, which are stacked along the crystal axis and include apparatus for monitoring a temperature drop across a radially extending gradient region of the module.
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Patent
Crucible and heater assembly for crystal growth from a melt
TL;DR: An annular crucible for containing molten, inorganic crystalline material in an apparatus for growing substantially monocrystalline articles including a plurality of spaced forming members disposed in a ring-like arrangement within the crucible as discussed by the authors.
Patent
Method of producing plate single-crystal of gadolinium molybdate
TL;DR: In this paper, the Czochralski method was used to produce a plate single-crystal of gadolinium molybdate having smooth (001) faces.