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Metastable zone width measuring method of KDP saturated solution in tonner crystal growth tank

A technology of potassium dihydrogen phosphate and crystal growth, which is applied to measuring devices, measuring heat, thermometers, etc., and can solve the problems that the quantity and price cannot meet the application requirements.

Inactive Publication Date: 2010-11-03
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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Problems solved by technology

Due to the improvement of laser output energy, correspondingly greater requirements are placed on the size of large-diameter KDP crystals. The traditional KDP crystal growth method is far from meeting the application requirements in terms of quantity and price, thus promoting the rapid development of KDP crystal growth methods. , carrying out rapid growth technology is an effective way and research direction to obtain large-diameter KDP crystals

Method used

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  • Metastable zone width measuring method of KDP saturated solution in tonner crystal growth tank
  • Metastable zone width measuring method of KDP saturated solution in tonner crystal growth tank
  • Metastable zone width measuring method of KDP saturated solution in tonner crystal growth tank

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Embodiment 1

[0009] Example 1: In the batching tank with a size of φ1400×1600mm, add 900Kg of AR-grade KDP powder produced by Shanghai Reagent No. The rate reaches 18.2MΩ·cm. After heating up and stirring at high speed to prepare a saturated KDP growth solution, the saturation temperature of the saturated solution was accurately measured by the hanging crystal method to be 72.5°C. The temperature was raised to 80°C, and the temperature was superheated and kept at constant temperature for 24 hours. The solution is continuously filtered through 0.22μ and 0.1μ secondary microporous filter elements in a closed system, and introduced into a crystal growth tank equipped with a rapid growth carrier. The top and bottom of the rapid growth crystal carrier are circular plates with a diameter of 1 meter, and four straight plates with a height of 1 meter are connected in the middle. The temperature of the water bath outside the crystal growth tank is 80°C, and the temperature starts to drop at a rat...

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Abstract

The invention relates to a metastable zone width measuring method of KDP saturated solution in a tonner crystal growth tank. In a dosing tank, after saturated KDP growth solution is prepared, the saturation temperature of the saturated solution is measured in a crystal hanging method accurately. After the consistent superheat temperature of the saturated solution is kept for 24 hours, the saturated solution is filtered and introduced into a crystal growth tank which is provided with a rapid growth crystal loading frame, seed crystals are not placed on the crystal loading frame, and the water bath temperature out of the growth tank is the same as the superheat temperature of the saturated solution. The rotation mode of the crystal loading frame is the same as that of rapid growth, and the cooling mode of the saturated solution is the same as that of rapid growth. When the temperature of the growth solution drops to the saturation temperature, the growth tank is observed. When observing that a first spontaneous crystal appears in the growth tank, the reading on a thermometer is recorded, and the difference of the temperature and the saturation temperature is the metastable zone width. By using the method, the metastable zone width of the KDP saturated solution in a large-scale crystal growth tank can be accurately measured.

Description

technical field [0001] The invention relates to a method for measuring the width of the metastable zone of a mono-crystal growth saturated solution of potassium dihydrogen phosphate in a ton-level crystal growth tank. Background technique [0002] Potassium dihydrogen phosphate (KDP) crystals are an important class of electro-optic and nonlinear crystal materials, which have high optical damage threshold and small decay characteristics, and are widely used in frequency doubling and frequency mixing of solid-state lasers. Due to the improvement of laser output energy, correspondingly greater requirements are placed on the size of large-diameter KDP crystals. The traditional KDP crystal growth method is far from meeting the application requirements in terms of quantity and price, thus promoting the rapid development of KDP crystal growth methods. , developing rapid growth technology is an effective way and research direction to obtain large-diameter KDP crystals. [0003] The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K13/00
Inventor 李国辉苏根博林秀钦李征东庄欣欣
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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