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Non-linear optical crystal-sodium beryllate borate, growth method and application thereof

A non-linear optics, sodium borate beryllium technology, applied in the field of new optoelectronic functional materials and growth, can solve the problems of low crystal birefringence, limited phase matching range, parallel arrangement, etc., and achieve the effect of good chemical stability

Active Publication Date: 2009-09-30
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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  • Non-linear optical crystal-sodium beryllate borate, growth method and application thereof
  • Non-linear optical crystal-sodium beryllate borate, growth method and application thereof
  • Non-linear optical crystal-sodium beryllate borate, growth method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Synthesis of Compound NaBeB by High Temperature Solid State Reaction 3 o 6

[0034] Raw materials used: Na 2 CO 3 1.0599 grams (0.01mol)

[0035] BeO 0.5002g (0.02mol)

[0036] B 2 o 3 2.0886g (0.03mol)

[0037] Its chemical reaction equation is:

[0038] Na 2 CO 3 +2BeO+3B 2 o 3 = 2NaBeB 3 o 6 +CO 2 ↑

[0039] 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 mortar, mix them evenly and grind them carefully, then put them into a platinum crucible of Φ30×30mm, press it tightly with a medicine spoon and cover it , put it into the muffle furnace (the muffle furnace is placed in the fume hood, and the exhaust port of the fume hood is exhausted through the water tank), slowly raise the temperature to 600°C and pre-burn at a constant temperature for 3 hours. Cause the change of proportion, make ...

Embodiment 2

[0041] Synthesis of Compound NaBeB by High Temperature Solid State Reaction 3 o 6 Raw materials used: Na 2 CO 3 1.0599 grams (0.01mol)

[0042] BeO 0.5002g (0.02mol)

[0043] h 3 BO 3 3.7098 grams (0.06mol)

[0044] Its chemical reaction equation is:

[0045] Na 2 CO 3 +2BeO+6H 3 BO 3 = 2NaBeB 3 o 6 +CO 2 ↑+9H 2 O↑

[0046] 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 mortar, mix them evenly and grind them carefully, then put them into a platinum crucible of Φ30×30mm, press it tightly with a medicine spoon and cover it , put it into the muffle furnace (the muffle furnace is placed in the fume hood, and the exhaust port of the fume hood is exhausted through the water tank), slowly raise the temperature to 600°C and pre-burn at a constant temperature for 3 hours. Cause the change of proportion, make...

Embodiment 3

[0048] Growth of Crystalline NaBeB by Molten Salt Method 3 o 6

[0049] The crystal growth device is a self-made resistance wire heating furnace, and the temperature control device is a 908PHK20 programmable automatic temperature controller. Use Na 2 O-B 2 o 3 As a flux, spontaneous nucleation to obtain crystals.

[0050] Raw materials used: Na 2 CO 3 Analytical pure AR 21.198g (0.2mol)

[0051] BeO Analytical Pure AR 2.5011g (0.1mol)

[0052] B 2 o 3 Analytical pure AR 41.772 grams (0.6mol)

[0053] The specific operation steps are as follows: after weighing the above-mentioned raw materials according to the above-mentioned doses, mix them evenly, then put them into a Φ60×60mm platinum crucible, place them in a self-made growth furnace, raise the temperature to 1000°C until the raw materials are completely melted, and keep the temperature for 10 hours. Rapidly cool down to 5-10°C above the saturation temperature, then cool down to 650°C...

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Abstract

The invention relates to a non-linear optical crystal-sodium beryllate borate, a growth method and application thereof. A chemical formula of the sodium beryllate borate is NaBeB3O6, the sodium beryllate borate belongs to an orthorhombic system, a space group is Pna21, cell parameters are that a is equal to 9.1531*, b is equal to 11.9337*, c is equal to 4.3724*, alpha is equal to beta, gamma and 90 DEG, and z is equal to 4, and the unit-cell volume is that V is equal to 477.60*<3>. The frequency multiplication coefficient of the sodium beryllate borate is 1.22 times of that of LiB3O5(LBO). The ultraviolet absorption edge of the sodium beryllate borate is shorter than 190nm. A solid-phase synthesis method is adopted for sintering at high temperature to obtain a NBB compound. A monocrystal can be successfully grown by using a molten salt method and taking Na2O-B2O3 or NaF-B2O3 as a fluxing agent. The NaBeB3O6 has non-linear optical effect, cannot be dissolved into dilute acid, has good chemical stability, can be widely applied in various non-linear optical fields, and can develop the non-linear optical application of deep ultraviolet wavebands.

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. sodium boron beryllium acid, whose chemical formula is NaBeB 3 o 6 , referred to as NBB. technical background [0002] The nonlinear optical effect of crystal refers to such an effect: when a laser beam with a certain polarization direction passes through a nonlinear optical crystal (such as NBB) in a certain incident direction, the frequency of the beam will 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 BBO, LBO, KBBF, SBBO, TBO, KABO, BABO and other crystals have attracted much attention du...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/22C30B9/12H01S3/16
Inventor 叶宁王时超李炜
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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