Journal of Synthetic Crystals, Volume. 49, Issue 3, 398(2020)

Study on the Growth of Super Large Sapphire Plate by EFG Method

WANG Donghai1... XU Jun1,*, LI Dongzhen2, WANG Qingguo1, LUO Ping1, DONG Jianshu1 and PAN Yanping3 |Show fewer author(s)
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  • 1[in Chinese]
  • 2[in Chinese]
  • 3[in Chinese]
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    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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    Paper Information

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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)

    DOI:

    CSTR:32186.14.

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