Non-linear optical crystal calcium sodium borate and preparation method and application thereof

A kind of nonlinear optics, sodium borate technology, applied in nonlinear optics, chemical instruments and methods, optics, etc., can solve the problem of not being able to buy crystals in the market

Inactive Publication Date: 2012-02-15
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, to test the basic physical properties (including nonlinear optical properties) of a crystal, the size of the crystal needs to be several

Method used

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  • Non-linear optical crystal calcium sodium borate and preparation method and application thereof
  • Non-linear optical crystal calcium sodium borate and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The reaction process of this embodiment takes the aforementioned reaction formula (1) as an example, but is not limited to the reaction formula (1).

[0044] Press Na 2 O+ H 3 BO 3 + CaO → NaCa 4 B 3 o 9 + H 2 O ↑ Synthesis of NaCa 4 B 3 o 9 compound, the specific steps are as follows:

[0045] Na 2 O, H 3 BO 3 , CaO in a stoichiometric ratio into a mortar, mixed and carefully ground, then put into a Φ200mm×200mm open corundum crucible, compact it, put it into a muffle furnace, slowly raise the temperature to 450°C, and keep the temperature for 5 hours , drive out the gas as much as possible, take out the crucible after cooling, grind the sample evenly, put it in the crucible, keep the temperature in the muffle furnace at 880°C for another 5 hours, wait for the temperature to drop to room temperature, take it out, grind it carefully, and again Keep the temperature at 880°C for 24 hours, put it into a mortar after cooling, and grind it slightly to get comple...

Embodiment 2

[0049] The reaction process of this embodiment takes the aforementioned reaction formula (2) as an example, but is not limited to the reaction formula (2).

[0050] Press Na 2 CO 3 +B 2 o 3 + CaO → NaCa 4 B 3 o 9 + CO 2 ↑Synthesis of NaCa 4 B 3 o 9 Compound, specific operation steps are carried out according to embodiment 1;

[0051] The synthesized NaCa 4 B 3 o 9 Compound and Flux KF: H 3 BO 3 =1:1.5:1.5 for mixing, put it into a Φ100mm×100mm open platinum crucible, heat up to 1100°C, keep the temperature for 100 hours and then cool down to 900°C, cut the optimized NaCa 4 B 3 o 9 The seed crystal is fixed on the lower end of the seed rod with a platinum wire, and the seed crystal is introduced into the crucible from the small hole on the top of the furnace to make it contact with the liquid surface. The seed crystal rotates at a rate of 50 rpm, and the rotation time in one direction is 5 minutes. The interval is 1min. Keep the temperature constant for 1 ho...

Embodiment 3

[0054] The reaction process of this embodiment takes the aforementioned reaction formula (3) as an example, but is not limited to the reaction formula (3).

[0055] by NaNO 3 + H 3 BO 3 + CaCO 3→NaCa 4 B 3 o 9 + CO 2 ↑ + H 2 O ↑ Synthetic NaCa 4 B 3 o 9 Compound, specific operation steps are carried out according to embodiment 1;

[0056] The synthesized NaCa 4 B 3 o 9 Compound and flux NaF: H 3 BO 3 Mix according to the molar ratio of 1:3:2, put it into an open platinum crucible of Φ110mm×110mm, heat up to 1100°C, keep the temperature for 50 hours and then cool down to 865°C, cut the optimized NaCa 4 B 3 o 9 The seed crystal is fixed on the lower end of the seed rod with a platinum wire, and the seed crystal is introduced into the crucible from the small hole on the top of the furnace to make it contact with the liquid surface. The interval is 0.5min. Keep the temperature for 1 hour, quickly cool down to 845°C, and then cool down at a rate of 1°C / day. Afte...

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Abstract

The invention relates to non-linear optical crystal calcium sodium borate and a preparation method and application thereof. The optical crystal calcium sodium borate is a single crystal with a centimeter dimension and belongs to an orthorhombic system, wherein the molecular formula of the optical crystal calcium sodium borate is NaCa4B3O9, the molecular weight is 359.73, and the unit cell parameters are shown as follows: a is equal to 10.68004(11)A, b is equal to 11.28574(11)A and c is equal to 6.48521(6)A. In the preparation method, a target product is formed by taking calcium sodium borate polycrystal powder and the like as a raw material and by utilizing a flux growth method. In the non-linear optical crystal calcium sodium borate and the preparation method and the application thereof, the raw material has a broad source and is cheap and available. Moreover, the preparation process is simple and is easy to operate and has a short period; an obtained product has the centimeter dimension; inclusions are few; the non-linear optical effect of the non-linear optical crystal calcium sodium borate is approximately equal to 2/3 of the non-linear optical effect of potassium dihydrogen phosphate (KDP) to be tested under the same condition; the laser-induced damage threshold is larger; the mechanical property is good; the non-linear optical crystal calcium sodium borate is not easy to fracture and is not deliquescent; the physical and chemical properties are stable; the light transmission band is 220nm to 3000nm; and the non-linear optical crystal calcium sodium borate has a wider light transmission range in ultraviolet and deep ultraviolet areas, is easy to process and store and is suitable for widely being applied in non-linear optical devices, such as ultraviolet frequency doubling generators, upper or lower frequency converters or optical parameter oscillators and the like.

Description

technical field [0001] The invention relates to a nonlinear optical crystal and a preparation method thereof, in particular to a large-size nonlinear optical crystal sodium calcium borate, a preparation method and application thereof. Background technique [0002] In recent years, as one of the important information materials, nonlinear optical crystal materials (including laser frequency conversion materials, electro-optic materials and photorefractive materials) have been developed rapidly, and have played an increasingly important role in high-tech fields . For example, by using the frequency doubling effect of the crystal, the frequency of the laser can be changed, and the wavelength range of the laser light source can be broadened, thereby obtaining a new laser light source and making the laser widely used. The all-solid-state laser system is made by utilizing the frequency-doubling properties of nonlinear optical crystals. It has the advantages of small size, stable ...

Claims

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Application Information

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IPC IPC(8): C30B29/22C30B9/12G02F1/37G02F1/355
Inventor 王永疆任学勇王瑗黄伍桥
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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