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- W2369943355 abstract "The perfect and full transparent sapphire crystals,80mm in diameter and 90mm in high have been successfully grown by means of vertical Bridgman technique.The two loop heating equipment and Mo crucible 80mm in diameter have been adopted during the growth process.The parameters for crystal growth are typically as follows:temperature gradients next the interface are 25—30℃/cm,dropping rate is 0.8—1.8mm/h,the direction of crystallization is [0001];and energy consuming is 15kW.Their transmission spectra have been measured.It has been found that the main defects in the sapphire crystal are pores,solid and yellow inclusions.Their formation cause has been approached briefly and some elimination or decrease measures have been given. So,the bases have been supplied for growth of higher quality and larger size sapphire crystals." @default.
- W2369943355 created "2016-06-24" @default.
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- W2369943355 date "2000-01-01" @default.
- W2369943355 modified "2023-09-25" @default.
- W2369943355 title "Investigation on Defect of Sapphire Crystals by Vertical Bridgman Technique" @default.
- W2369943355 hasPublicationYear "2000" @default.
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