Non-crucible growing method for magneto-optic rear earth ferrite crystal
A growth method, ferrite technology, applied in the direction of crystal growth, single crystal growth, single crystal growth, etc., can solve the problems of crucible corrosion environment, high growth temperature, easy occurrence of magnetoplumbite, etc., to achieve the elimination of crucible pollution, growth Simple preparation and convenient operation
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[0020] Example 1:
[0021] Set the molar ratio of Y to 1:1 2 O 3 With Fe 2 O 3 After weighing and mechanically mixing uniformly, pre-fired at 1000°C for 10h, pressed into a rod shape under 250MP isostatic pressure, sintered in a muffle furnace at 1500°C for 24h, put into a crucible-free single crystal growth furnace, heated by laser focus, Grow crystals in an air atmosphere. Growth speed: 5mm / h, raw material rod rotation speed: 10rpm, seed crystal rotation speed: 10rpm. After the material rod is completely crystallized, slowly lower the temperature and take out the crystal. The crystal was annealed at 1000℃ for 30h in an air atmosphere, and the crystal was obtained. After testing, the crystal structure is complete and pure YFeO 3 Phase, there is no other impurity phase, and the crystal quality is good.
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[0022] Example 2:
[0023] Set the molar ratio of Y to 1:1.08 2 O 3 With Fe 2 O 3 Weighed, mixed mechanically, and pre-fired at 900°C for 15 hours, formed by 200MP isostatic pressing to form a primary material rod with a diameter of 16mm, and then sintered in a muffle furnace at 1600°C for 20 hours, and put it into a crucible-free single crystal growth furnace , Using resistance heating, air atmosphere growth. The growth speed is 6 mm / h, the rotation speed of the material rod is 5 rpm, and the rotation speed of the seed crystal is 15 rpm. After the crystal growth is over, slowly lower the temperature to room temperature and take out the crystal. The crystal was annealed at 1100℃ for 36h in air atmosphere, and high quality YFeO without cracks was obtained 3 Crystal.
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[0024] Example 3:
[0025] Set the molar ratio of Tm to 1:1.05 2 O 3 With Fe 2 O 3 After weighing and mechanically mixing uniformly, pre-fired at 950°C for 10h, pressed into a rod shape under 150MP isostatic pressure, sintered in a muffle furnace at 1500°C for 24h, put into a single crystal growth furnace, heated by resistance, in an air atmosphere Medium growth TmFeO 3 Crystal. The growth rate is 8mm / h, and the rotation speed of the material rod and the seed crystal rotation speed are both 10rpm. After the material rod is completely crystallized, the temperature is slowly cooled to room temperature to obtain TmFeO 3 Crystal.
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