Donghai WANG, Wentao HOU, Na LI, Dongzhen LI, Xiaodong XU, Jun XU, Qingguo WANG, Huili TANG. Defects and Optical Property of Single-crystal Sapphire Fibers Grown by Edge-defined Film-fed Growth Method [J]. Journal of Inorganic Materials, 2020, 35(9): 1053
- Journal of Inorganic Materials
- Vol. 35, Issue 9, 1053 (2020)
1. Schematic experimental device1-Melt; 2-Crucible; 3-Die; 4-Meniscus; 5-Sapphire fiber; 6-Seed
2. View of as-grown sapphire in which fibers with irregular shape (a) and regular shape (b)
3. Schematic diagram of the boundary conditions used in the numerical simulation
4. Growth stripes in the crystal structure caused by slight vibrations above the die, v =30 mm/h
5. Cross section morphology and bubbles' distribution in the cross section of the sapphire fibers
6. Principles of capillary shaping for EFG fiber growth methodR m-Vertical curvature of the meniscus; R d-Die radius; R c-Radius of the crystal; H m-Meniscus height
7. Relationship between theoretical meniscus shapes Z (R ) and different fiber radii R
8. Bubbles’ distribution observed on the lateral periphery of the fiber
9. Decrease in total Mo inclusion length with die life (a) and Mo concentration as a function of time from a sapphire melt (b)
10. Flow field in the meniscus (fiber radius 0.5 mm) and corresponding bubbles in the crystals
11. Absorption spectrum of the EFG sapphire fiber
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Table 1.
Parameter φo for different crystals
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