Crystal pulling method for crystal bar
The technology of crystal rod and crystal pulling furnace is applied in the field of crystal rod pulling, which can solve the problems of poor crystal rod quality and affect the refrigeration efficiency of semiconductor refrigeration parts, and achieves good crystal rod quality, low breakage rate and easy realization. Effect
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Embodiment 1
[0018] a. Perform the first crystal pulling on the original crystal rod (the crystal rod that has not been pulled, the same below) at 300°C to make the first crystal rod.
[0019] The ingot was made into a 10cm×10cm cooling piece, and the cooling piece passed 12V direct current for 2 minutes, the temperature difference on both sides was 7.1°C, and the breakage rate was 18% when the crystal ingot was processed into crystal grains.
Embodiment 2
[0021] The crystal ingot is pulled under the following conditions:
[0022] a. Raise the temperature of the raw ingot to 280°C within 30 minutes and keep it there for 10 minutes;
[0023] b. Cool the ingot in the above step a to 50° C. within 7 minutes to make the second crystal ingot.
[0024] The ingot was further processed into a 10cm×10cm cooling unit. The cooling unit passed 12V direct current for 2 minutes, and the temperature difference between its two sides was 9.1°C. When the ingot was processed into crystal grains, the breakage rate was 14%.
Embodiment 3
[0026] The crystal rod is pulled under the following conditions:
[0027] a. Raise the temperature of the ingot to 320°C within 40 minutes and keep it for 15 minutes;
[0028] b. Cool the ingot in the above step a to 60° C. within 9 minutes to make the third crystal ingot.
[0029] The ingot was made into a 10cm×10cm cooling piece, and the cooling piece passed 12V direct current for 2 minutes, the temperature difference between the two sides was 9.8°C, and the breakage rate was 13% when the crystal ingot was processed into crystal grains.
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