Rapid solidification method for preparation of Te-doped cubic Ca2Ge
A technology of cubic phase and solidification method, applied in the field of Ca-Ge alloy materials, can solve the problem that Ge material preparation research has not been reported, and achieve the effect of meeting the needs of large-scale production, high density and low reaction temperature
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Embodiment 1
[0028] (1) Weigh Ca powder, Ge powder and Te powder respectively at a molar ratio of 82:21:0.5, and mix them evenly under an argon protective atmosphere;
[0029] (2) Vacuum the electromagnetic induction levitation melting furnace, and then fill it with argon, then place the mixture obtained in step (1) in the water-cooled crucible of the electromagnetic induction levitation melting furnace, and raise the temperature to 950 °C to make the Ca in the crucible , Ge and Te are in a molten state, and the surface impurities are removed after smelting for 15 minutes; this operation is repeated 3 times to obtain a molten liquid;
[0030] (3) Put the molten liquid obtained in step (2) in a vacuum quenching furnace, and then fill it with high-purity argon for alloy remelting; then the melt is thrown out by the molybdenum wheel at a linear speed of 25 m / s, Obtain needle-shaped quick-setting powder;
[0031] (4) After the quick-setting powder obtained in step (3) was manually ground and ...
Embodiment 2
[0040] (1) Weigh Ca powder, Ge powder and Te powder respectively at a molar ratio of 82:21:1.5, and mix them evenly under an argon protective atmosphere;
[0041] (2) Vacuumize the electromagnetic induction levitation melting furnace, and then fill it with argon, then place the mixture obtained in step (1) in the water-cooled crucible of the electromagnetic induction levitation melting furnace, and raise the temperature to 1000 °C to make the Ca in the crucible , Ge and Te are in a molten state, and the surface impurities are removed after smelting for 25 minutes; this operation is repeated 4 times to obtain a molten liquid;
[0042] (3) Put the molten liquid obtained in step (2) in a vacuum quenching furnace, and then fill it with high-purity argon for alloy remelting; then the melt is thrown out by the molybdenum wheel at a linear speed of 30 m / s, Obtain needle-shaped quick-setting powder;
[0043](4) After the quick-setting powder obtained in step (3) was manually ground a...
Embodiment 3
[0048] (1) Weigh Ca powder, Ge powder and Te powder respectively at a molar ratio of 82:21:3, and mix them evenly under an argon protective atmosphere;
[0049] (2) Vacuum the electromagnetic induction levitation melting furnace, and then fill it with argon, then place the mixture obtained in step (1) in the water-cooled crucible of the electromagnetic induction levitation melting furnace, and raise the temperature to 1100 °C to make the Ca in the crucible , Ge and Te are in a molten state, and the surface impurities are removed after smelting for 35 minutes; this operation is repeated 5 times to obtain a molten liquid;
[0050] (3) Put the molten liquid obtained in step (2) in a vacuum quenching furnace, and then fill it with high-purity argon for alloy remelting; then the melt is thrown out by the molybdenum wheel at a linear speed of 50 m / s, Obtain needle-shaped quick-setting powder;
[0051] (4) After the quick-setting powder obtained in step (3) was manually ground and s...
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