Crystal growth tank and method for removing mixed crystals at bottom of tank

A crystal growth and miscellaneous crystal technology, applied in the direction of crystal growth, single crystal growth, single crystal growth, etc., can solve the problems of spontaneous nucleation, stop of crystal growth process, large supersaturation, etc., to improve the success rate and prevent miscellaneous The effect of crystal movement

Active Publication Date: 2022-04-22
MINDU INNOVATION LAB +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At this stage, KDP / DKDP crystal growth mainly adopts fast growth and traditional slow growth methods. In the process of rapid crystal growth, due to high supersaturation, fine impurities in the solution, including dust in the air, etc., it is easy to cause crystal growth. Spontaneous nucleation of the solution, resulting in miscellaneous crystals, which stop the crystal growth process due to the excessive growth rate of the miscellaneous crystals

Method used

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  • Crystal growth tank and method for removing mixed crystals at bottom of tank

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Effect test

Embodiment 1

[0035] A crystal growth tank, such as figure 1 As shown, it includes a miscellaneous crystal dissolution cover 3, a movable connecting pipe 4, a heater 5, a tank body 6, a continuous filter device 8, a stirring motor 9, and a crystal carrier 10;

[0036] The continuous filtering device 8 is located outside the tank body, including a circulating pump and a filter element;

[0037] A stirring motor 5 is provided at the center of the top of the tank body 6, and the connecting rod of the stirring motor 5 passes through the top of the tank body 6 and enters the crystal growth solution cavity 7, and then is connected with a crystal carrier 10;

[0038] The crystal is erected inside the tank body, and the crystal carrier 10 and the bottom of the tank body 6 are provided with a miscellaneous crystal dissolving cover 3, and the cover opening of the miscellaneous crystal dissolving cover is towards the bottom of the tank body, and the diameter of the cover opening is 50mm. Crystal diss...

Embodiment 2

[0044] A method for removing impurities at the bottom of the tank when preparing KDP crystals, using the crystal growth tank described in Embodiment 1, the crystal carrier 10 is rotated inside the tank body 6 to stir the crystal growth solution, and the stirring rotation cycle mode is forward rotation-stop -Reverse rotation, forward rotation for 30s, stop rotation for 5s, reverse rotation for 30s, repeat, the rotation speed is 30r / min. After the crystal growth solution is circulated and filtered through the continuous filter device 8 , the solution is heated to 15° C. above the saturation point by the heater 5 , and enters the miscellaneous crystal dissolution cover 3 through the movable connecting pipe 4 .

[0045] When miscellaneous crystals appear during the growth process, after finding the position of the miscellaneous crystals, control the mobile connecting pipe 4 to place the miscellaneous crystals in the miscellaneous crystal dissolution cover 3, apply pressure so that ...

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Abstract

The invention provides a crystal growth tank and a method for removing mixed crystals at the bottom of the tank, and belongs to the field of crystal growth. The crystal growth tank comprises a mixed crystal dissolving cover, a movable connecting pipe, a heater, a tank body, a continuous filtering device, a stirring motor and a crystal carrying frame; the continuous filtering device is arranged outside the tank body; the crystal carrying frame is arranged in the groove body; the mixed crystal dissolving cover is positioned between the crystal carrying frame and the bottom of the tank body; a cover body opening of the mixed crystal dissolving cover faces the bottom of the tank body; the mixed crystal dissolving cover is provided with a solution inlet and a solution outlet; one end of the movable connecting pipe is communicated with the solution inlet, and the other end is communicated with the continuous filtering device; a heater is arranged at one end of the movable connecting pipe close to the continuous filtering device; a crystal growth solution enters the mixed crystal dissolving cover through the continuous filtering system, and the movable connecting pipe can move the mixed crystal dissolving cover to achieve the purpose of directionally dissolving mixed crystals, so that the problem of mixed crystals in the crystal growth process is solved, and the success rate of crystal growth is improved.

Description

technical field [0001] The invention relates to a crystal growth tank and a method for removing impurities at the bottom of the tank, and belongs to the technical field of crystal growth. Background technique [0002] Potassium dihydrogen phosphate crystals (KDP) and potassium dideuteric phosphate crystals (DKDP) are important optical components used in inertial confinement nuclear fusion devices. coefficient, high damage threshold, larger aperture, proper birefringence and low refractive index inhomogeneity. [0003] At this stage, KDP / DKDP crystal growth mainly adopts fast growth and traditional slow growth methods. In the process of rapid crystal growth, due to high supersaturation, fine impurities in the solution, including dust in the air, etc., it is easy to cause crystal growth. The spontaneous nucleation of the solution produces miscellaneous crystals, and the growth rate of miscellaneous crystals is too fast, resulting in the stop of the crystal growth process. C...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B35/00C30B29/10
CPCC30B35/00C30B29/10Y02P70/50
Inventor 郑国宗胡子钰林秀钦李静雯李鹏飞
Owner MINDU INNOVATION LAB
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