Device and method for growing large-size single crystal by dynamic temperature gradient method
A temperature gradient method, large-scale technology, applied in the direction of single crystal growth, crystal growth, single crystal growth, etc., can solve the problems of difficult temperature gradient control, poor crystal integrity, low yield, etc., to achieve large size, high yield, complete good sex effect
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Embodiment 1
[0023] Growth of large size MgF by a dynamic temperature gradient method 2 The single crystal method includes the following steps:
[0024] a. MgF 2 The seed crystal is put into the seed crystal tank at the bottom of the inner cavity of the crucible 7, and the polycrystalline MgF with a purity greater than 99.99% 2 The raw material is put into the crucible 7, and the crucible 7 is put into the complete insulation screen composed of the circumferential insulation screen 1, the top insulation screen 2, the bottom insulation screen 3 and the center insulation screen 4, and the complete insulation screen is put into the single crystal furnace and Vacuum the single crystal furnace;
[0025] b. Start the central control system so that the heating element 8 can heat up the single crystal furnace. The heating rate is set to 10~15°C / h. Protective gas (such as N 2 or Ar), raise the temperature of the growth furnace to 20-50°C above the growth temperature required for the crystal, an...
Embodiment 2
[0033] Growth of large size CaF by a dynamic temperature gradient method 2 The single crystal method includes the following steps:
[0034] a. CaF 2 The seed crystal is put into the seed crystal tank at the bottom of the inner cavity of the crucible 7, and the polycrystalline CaF with a purity greater than 99.99% 2 The raw material is put into the crucible 7, and the crucible 7 is put into the complete insulation screen composed of the circumferential insulation screen 1, the top insulation screen 2, the bottom insulation screen 3 and the center insulation screen 4, and the complete insulation screen is put into the single crystal furnace and Vacuum the single crystal furnace;
[0035] b. Start the central control system so that the heating element 8 can heat up the single crystal furnace. The heating rate is set to 10~15°C / h. Protective gas (such as N 2 or Ar), raise the temperature of the growth furnace to 20-50°C above the growth temperature required for the crystal, an...
Embodiment 3
[0043] A device for growing large-scale YAG single crystals by a dynamic temperature gradient method comprises the following steps:
[0044] a. Put the YAG seed crystal into the seed crystal groove at the bottom of the inner cavity of the crucible 7, put the polycrystalline YAG raw material with a purity greater than 99.99% into the crucible 7, and put the crucible 7 into the circumferential insulation screen 1 and the top insulation screen 2 , the bottom insulation screen 3 and the complete insulation screen formed by the center insulation screen 4, put the complete insulation screen into the single crystal furnace and evacuate the single crystal furnace;
[0045] b. Start the central control system so that the heating element 8 can heat up the single crystal furnace. The heating rate is set to 10~15°C / h. Protective gas (such as N 2 or Ar), raise the temperature of the growth furnace to 20-50°C above the growth temperature required for the crystal, and then keep the temperat...
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