Fig. 1. Bridgman crystal growth system

Fig. 2. Calculating region and boundary conditions for single crucible

Fig. 3. Diagram of multi-crucible furnace

Fig. 4. Evolution of growth rate and interface shape during growth. （a） Axial growth rate variation along the crystal growth height； （b）~（g） temperature distribution in different growth stages

Fig. 5. Variation of central axis crystal growth rate with crystal growth height for adiabatic block lengths of 5， 10， 15 and 20 cm （a）， as well as the isotherm distribution at a growth height of 200 mm （b）~（e）

Fig. 6. Variation of central axis crystal growth rate with crystal growth height at lower heater temperatures of 1 300， 1 400， 1 500， and 1 600 K （a）， as well as the isotherm distribution at a growth height of 200 mm （b）~（e）

Fig. 7. Variation of central axis crystal growth rate with crystal growth height at upper heater temperatures of 1 675， 1 700， 1 725， and 1 750 K （a）， as well as the isotherm distribution at a growth height of 200 mm （b）~（e）

Fig. 8. Variation of central axis crystal growth rate with crystal growth height at different crucible bottom shapes （θ=0°， 15°， 30°） （a）， as well as the evolution of the growth interface shape （b）~（d）

Fig. 9. Effect of crystal size on growth rate and interface shape. （a） Variation of central axis crystal growth rate with crystal growth height of different crystal sizes； temperature distribution of small-sized （b） and large-sized （c） crystal

Fig. 10. Thermal field control of large-sized crystals.（a） Variation of central axis crystal growth rate with crystal growth height at different upper heater temperatures； （b）， （c） temperature distribution

Fig. 11. Temperature distribution of furnace with multi-crucible

Fig. 12. Temperature distribution of multi-crucible and large-sized single crucible

Fig. 13. Heat field control in actual furnace. （a） Interface shape of different T_c （L represents melt， S represents crystal）； （b） local diagram of the crystal growth system； （c） diagram of heat dissipation opening； （d） interface shape of different d

Fig. 14. Temperature profile of different upper heater bottom temperatures T_c （a） and heat dissipation opening heights d （b）