Method for developing monocrystal of potassium dihydrogen phosphate in large aperture rapidly

A technology for single and crystal growth of potassium dihydrogen phosphate, applied in the directions of single crystal growth, crystal growth, single crystal growth, etc., can solve the problems of high equipment cost and increased cost, and achieve high utilization rate, short recovery time, and high seed quality. Small size effect

Inactive Publication Date: 2006-02-01
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
View PDF0 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the purity of raw materials used in this method is very high, and the cost will also increase accordingly. Moreover, the solution must be circulated and filtered during the crystal growth process, and the equipment cost is high.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Example 1: Take 22,000ml of ultrapure water and add about 10,000 grams of AR-grade KDP raw material, then add 250 grams of AR-grade potassium chloride and 2 grams of AR-grade EDTA, heat up to 70°C in a 30,000ml ground-sealed glass jar, and stir at a constant temperature After 24 hours, after the KDP raw material was completely dissolved, the saturation point of the solution was accurately measured as 54°C by the hanging crystal method after cooling down. The solution was filtered through a filter membrane with a pore size of 0.15 μ at high temperature, and then heated to 70°C, which was 15°C higher than the saturation point, and then superheated for 24 hours to be seeded, which helped to improve the stability of the solution and reduce spontaneous crystallization during crystal growth. After cutting the transparent and complete KDP crystal at 90°Z, take a small square wafer with a size of 8×8×3 (mm) as the seed crystal, rub it on a silk cloth moistened with distilled wat...

Embodiment 2

[0012] Example 2: Take 3000ml of ultrapure water and add about 1500 grams of AR-grade KDP raw material, then add 41 grams of AR-grade potassium chloride and 0.3 gram of AR-grade EDTA, heat up to 70°C in a 5000ml ground-sealed glass jar, and stir at a constant temperature After 24 hours, after the KDP raw material was completely dissolved, the saturation point of the solution was accurately measured as 62° C. by the hanging crystal method after cooling down. The solution was filtered through a filter membrane with a pore size of 0.15 μ at high temperature, and then heated to 75 ° C, which was 13 ° C higher than the saturation point, and then superheated for 24 hours to be seeded, which helped to improve the stability of the solution and reduce spontaneous crystallization during crystal growth. After cutting the transparent and complete KDP crystal at 90°Z, take a small square wafer with a size of 8×8×3 (mm) as the seed crystal, rub it on a silk cloth moistened with distilled wat...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

A process for quickly growing the large-diameter monocrystal of potassium dihydrogen phosphate by solution temp lowering method features that the consumptions of potassium chloride and EDTA are respectively 1-5 M% and 0.01-0.02 Wt%, the initial over-saturation is 8 deg.C for maximum, and the temp lowering speed is 0.3-0.5 deg.C per day for initial growing stage and 2 deg.C per day for fast growing stage.

Description

technical field [0001] The present invention relates to crystal growth, in particular to large aperture potassium dihydrogen phosphate (KH 2 PO 4 , referred to as KDP) single crystal rapid growth method. Background technique [0002] KDP crystal is an excellent nonlinear optical material, which is mainly used in the second, third, and fourth times of laser frequency doubling, especially the high-quality large-size KDP crystal, which has been listed as the only practical material for laser nuclear fusion frequency conversion internationally. , is also a hot topic in international crystal growth research. So far, most of them still use traditional methods to grow single crystals. Although the commonly used cooling method, constant temperature flow method, constant temperature evaporation replenishment solution method, etc. can also grow single crystals with better quality and larger size, the growth rate is too high. Slow, the growth cycle is too long, the cost is too high,...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C30B7/08C30B29/14
Inventor 李国辉苏根博薛丽平李征东庄欣欣贺友平
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap