Journal of Synthetic Crystals, Volume. 49, Issue 3, 398(2020)
Study on the Growth of Super Large Sapphire Plate by EFG Method
The super large sapphire single crystal plate was successfully grown in a self-designed single-crystal growth furnace with edge- defined film-fed growth (EFG) method, the ideal temperature distribution of the die surface was designed by thermal field simulation. Two-stage heating is used to control the crystal stress and bubble defects, and to choose a suitable pulling rate to control the distribution of the bubble layer. The crystal could yield a plate with usable dimensions of up to 690 mm×300 mm×12 mm, X-ray diffraction show a full-width at half-maximum (FWHM) of the rocking curve of 0.016 3°, indicating a high crystalline quality. Results of transmission measurements performed on 5 mm thick samples are presented and the transmission is similar to sapphire grown by other techniques.
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WANG Donghai, XU Jun, LI Dongzhen, WANG Qingguo, LUO Ping, DONG Jianshu, PAN Yanping. Study on the Growth of Super Large Sapphire Plate by EFG Method[J]. Journal of Synthetic Crystals, 2020, 49(3): 398
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Received: --
Accepted: --
Published Online: Jun. 15, 2020
The Author Email: Jun XU (xujun@mail.shcnc.ac.cn;李东振|dzhl@siom.ac.cn)
CSTR:32186.14.