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- W2377531837 abstract "When white sapphire arch sheet is grown using EFG heated by resistance,the temperature field on the top of mould is a key to the controlling of crystal's shape.The experiments found when radial temperature gradient was 1.6℃/mm and axial temperature gradient was 3.3℃/mm,the crystal with ideal shape formed easily.In order to eliminate the bubbles occurring during crystal growth,a fit mould was designed and suitable technological parameters were determined for the experiment.Low angle crystal boundary could be eliminated by use of high quality seed crystal,the technology of decreasing diameter and releasing shoulder and adjusting the shape of top of the mould.After solving these problems,sapphire arch sheet with the size of 2.6×30×240mm was produced experimentally and its internal quality meets the requirement of the mirror surface of watch." @default.
- W2377531837 created "2016-06-24" @default.
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- W2377531837 date "2007-01-01" @default.
- W2377531837 modified "2023-09-27" @default.
- W2377531837 title "The research of crystal growth of white sapphire arch sheet" @default.
- W2377531837 hasPublicationYear "2007" @default.
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