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Nonlinear optical crystal ammonium fluoroborate beryllium and its preparation method and use

A technology of nonlinear optics and fluoroborate beryllium acid, which is applied in the fields of nonlinear optics, chemical instruments and methods, and optics, can solve the problems of limited phase matching range, low crystal birefringence, and failure to give full play to its advantages. Strong phase matching ability and good chemical stability

Active Publication Date: 2018-11-06
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has a large frequency doubling coefficient, and the ultraviolet absorption edge is around 160nm, but due to the (B 3 o 7 ) 5- The groups are connected to each other, forming a helical chain at 45° to the z-axis in space and cannot be arranged in parallel in the crystal lattice, so that the birefringence of the crystal is too low (Δn=0.04~0.05), so that it can be used in ultraviolet light The phase matching range of the region is severely limited, so that the advantages of wide bandgap cannot be fully utilized

Method used

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  • Nonlinear optical crystal ammonium fluoroborate beryllium and its preparation method and use
  • Nonlinear optical crystal ammonium fluoroborate beryllium and its preparation method and use
  • Nonlinear optical crystal ammonium fluoroborate beryllium and its preparation method and use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Preparation of ammonium fluoroborate beryllium compound by hydrothermal method

[0050] Raw materials used:

[0051] BeO 0.25g (0.01mol)

[0052] h 3 BO 3 0.93g (0.015mol)

[0053] NH 4 F 0.925g (0.025mol)

[0054] Its chemical reaction equation is:

[0055] 2BeO+H 3 BO 3 +2NH 4 F=NH 4 be 2 BO 3 f 2 +NH 3 +2H 2 o

[0056] The specific operation steps are as follows: after weighing the above-mentioned raw materials according to the above-mentioned dosage in the operation box, put them into a 23ml hydrothermal kettle, pour 10ml of distilled water, put the hydrothermal kettle into the oven, and slowly heat the oven to 220°C , keep the temperature for 7 days, and then lower the temperature to 30°C at a rate of 5°C per hour. After cooling, wash the sample with distilled water and alcohol to obtain pure NH 4 be 2 BO 3 f 2 compound. This product is carried out X-ray analysis, gained collection of illustrative plates ( image 3 ) and the X-ray pattern of...

Embodiment 2

[0058] Preparation of ammonium fluoroborate beryllium compound by hydrothermal method

[0059] Raw materials used:

[0060] BeO 2.5g (0.1mol)

[0061] h 3 BO 3 3.1 grams (0.05mol)

[0062] NH 4 F 5.55g (0.15mol)

[0063] Its chemical reaction equation is:

[0064] 2BeO+H 3 BO 3 +2NH 4 F=NH 4 be 2 BO 3 f 2 +NH 3 +2H 2 o

[0065] The specific operation steps are as follows: After weighing the above-mentioned raw materials according to the above-mentioned dosage in the operation box, put them into a 200ml hydrothermal kettle, pour 100ml of distilled water, put the hydrothermal kettle into the oven, and slowly heat the oven to 180°C , keep the temperature for 7 days, and then lower the temperature to 30°C at a rate of 5°C per hour. After cooling, wash the sample with distilled water and alcohol to obtain pure NH 4 be 2 BO 3 f 2 compound. This product is carried out X-ray analysis, gained collection of illustrative plates ( Figure 4 ) and the X-ray pattern ...

Embodiment 3

[0067] Growth of ammonium fluoroborate beryllium monocrystal by hydrothermal method

[0068] The crystal growth device is a resistance wire heating furnace, and the temperature control equipment is a 908PHK20 programmable automatic temperature controller.

[0069] Raw materials used:

[0070] NH 4 be 2 BO 3 f 2 2 grams (0.015mol)

[0071] h 3 BO 3 0.62g (0.01mol)

[0072] NH 4 F 1.11g (0.03mol)

[0073] The specific operation steps are as follows: choose H 3 BO 3 --NH 4 F mineralizer system, after weighing the above raw materials according to the above dosage in the operation box, put them into a hydrothermal kettle with a capacity of 35ml, then pour 20ml of distilled water, and put the reaction kettle into the resistance wire heating furnace Slowly raise the temperature to 250°C / 330°C (upper temperature / lower temperature), and keep the temperature constant for 10 days. Then cool down to 50°C at a rate of 5°C per hour, turn off the furnace, wash the sample with...

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Abstract

The invention provides an ammonium beryllium borate fluoride as a nonlinear optical crystal as well as a preparation method and an application thereof. The chemical formula of the crystal is NH4Be2BO3F2 (ABBF for short). The structure of the crystal belongs to a trigonal crystal system; a space group is R32; cell parameters are as follows: a is equal to 4.4418 angstrom, b is equal to 4.4418 angstrom, c is equal to 19.9087 angstrom, Beta is equal to Alpha and 90 degrees, Gamma is equal to 120 degrees, and Zeta is equal to 3; the unit-cell volume is shown in the Specification; the frequency multiplication coefficient of the crystal is 1.5 times of KH2PO4 (KDP). The ultraviolet absorption edge is equal to or shorter than 180 nm. NH4Be2BO3F2 has a nonlinear optical effect, does not deliquesce in air, is good in chemical stability and can be widely applied to various nonlinear optical fields, and the nonlinear optical application of deep ultraviolet bands can be expanded.

Description

technical field [0001] The present invention relates to a novel optoelectronic functional material and its growth method and use, in particular to a nonlinear optical crystal material and its preparation method and use, i.e. ammonium fluoroboryryllate, whose chemical formula is NH 4 be 2 BO 3 f 2 , referred to as ABBF. Background technique [0002] The nonlinear optical effect of crystal refers to such an effect: when a beam of laser light with a certain polarization direction passes through a nonlinear optical crystal (such as a borate nonlinear optical crystal) in a certain incident direction, the frequency of the beam will be change. [0003] Crystals with nonlinear optical effects are called nonlinear optical crystals. The use of nonlinear optical crystals for laser frequency conversion broadens the range of laser wavelengths and makes the application of lasers more extensive. Especially borate nonlinear optical crystals such as BaB 2 o 4 (BBO), LiB 3 o 5 (LBO)...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/355C30B29/22C30B7/10
Inventor 叶宁彭广罗敏张戈陈昱林哲帅
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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