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Rubidium aluminum fluoborate nonlinear optical crystal and preparation method and application thereof

A technology of nonlinear optics and aluminum fluoroborate, applied in the fields of nonlinear optics, chemical instruments and methods, optics, etc., can solve problems such as unsatisfactory comprehensive performance, achieve crystal layered growth habit is not obvious, and easy to grow large-sized crystals , good thermal stability

Inactive Publication Date: 2021-06-29
HEBEI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a non-linear optical crystal of aluminum rubidium fluoroborate and its preparation method and application, so as to solve the problems of many difficulties and unsatisfactory comprehensive performance in the practical application of existing nonlinear optical crystals

Method used

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  • Rubidium aluminum fluoborate nonlinear optical crystal and preparation method and application thereof
  • Rubidium aluminum fluoborate nonlinear optical crystal and preparation method and application thereof
  • Rubidium aluminum fluoborate nonlinear optical crystal and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Preparation of RbAlB 3 o 6 F crystal raw material:

[0030] According to the reaction formula: 2RbF + Al 2 o 3 + 3B 2 o 3 = 2RbAlB 3 o 6F, synthetic compound Rb 3 al 3 (B 3 o 6 ) 3 f 3 , the dosage of reagents used is as follows:

[0031] RbF 2.0894 g (0.02 mol)

[0032] al 2 o 3 1.0196g (0.01mol)

[0033] B 2 o 3 2.0886g (0.03mol)

[0034] The specific operation steps are as follows:

[0035] Accurately weigh the raw materials according to the above mass, put them into an agate mortar, mix them evenly and grind them carefully, then put them into a corundum crucible of φ60mm×60mm, compact them, put them into a muffle furnace and slowly raise the temperature to 500°C, and keep the temperature for 3h . Then take it out after cooling to room temperature, grind it fully again, put it into a muffle furnace, and burn it at 600°C for 48 hours to obtain the compound RbAlB 3 o 6 F. Reaction product purity was determined by powder X-ray diffraction. ...

Embodiment 2

[0037] Growth of RbAlB by pulling method 3 o 6 F nonlinear optical crystal:

[0038] Put the prepared polycrystalline aluminum rubidium fluoroborate compound powder (as described in Example 1) into a platinum crucible with a diameter of φ40 mm × 60 mm, place it in a crystal furnace, raise the temperature to 750 °C, and keep the temperature constant for 10 h until the raw materials are completely melted and uniform. Rapidly cool down to 1°C above the freezing point. Then fix the seed crystal on the lower end of the seed crystal rod to contact with the liquid surface of the melt, overheat for 10 minutes and then lower the temperature to 1°C below the freezing point to start crystal growth. Apply a crystal rotation of 10 rpm by a crystal growth controller, pull the seed crystal at a rate of 5 mm / day, and then slowly cool down at a rate of 1° C. / day. After the crystal growth is completed, the crystal is lifted from the liquid surface and cooled to room temperature at a rate of ...

Embodiment 3

[0040] Kyropoulos growth of RbAlB 3 o 6 F nonlinear optical crystal:

[0041] Put the prepared polycrystalline aluminum rubidium fluoroborate compound powder (as described in Example 1) into a platinum crucible with a diameter of 50 mm × 50 mm, place it in a crystal furnace, raise the temperature to 800 ° C, and keep the temperature constant for 48 hours until the raw materials are completely melted and uniform, and quickly Cool down to 0.5°C above the freezing point. Then fix the seed crystal on the lower end of the seed crystal rod to contact with the liquid surface of the melt, overheat for 1 min and then cool down to the freezing point to start crystal growth. The crystal rotation was applied by a crystal growth controller at 2 rpm without pulling the seed crystal, and then the temperature was slowly lowered at a rate of 0.1°C / day. After the crystal growth is completed, the crystal is lifted from the liquid surface and lowered to room temperature at a rate of 10°C / h to ...

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Abstract

The invention provides a rubidium aluminum fluoborate nonlinear optical crystal and a preparation method and application thereof. The chemical formula of the crystal is RbAlB3O6F, the crystal structure belongs to an orthorhombic system, the space group is Pna21, and the cell parameters are as follows: a=22.403(4) angstroms, b=12.311(2) angstroms, c=7.2051(13) angstroms, alpha=beta=gamma=90 degrees, and unit cell volume is 1987.1(6) angstrom<3>. The rubidium aluminum fluoborate nonlinear optical crystal disclosed by the invention has excellent optical performance, relatively strong nonlinear optical effect, short ultraviolet cutoff edge and deep ultraviolet phase matching wavelength lower than 200nm, has no layered growth habit, does not use highly toxic raw materials, and is easy for large-size crystal growth and realization of industrialization. The rubidium aluminum fluoborate crystal disclosed by the invention can meet the use requirements of nonlinear optical crystals in a deep ultraviolet region.

Description

technical field [0001] The invention relates to the technical field of optoelectronic functional materials, in particular to an aluminum rubidium fluoroborate nonlinear optical crystal, a preparation method and application thereof. Background technique [0002] Nonlinear optical crystals can change the wavelength of laser light by means of sum frequency, difference frequency, and optical parametric oscillation, and play an irreplaceable role in laser technology. Currently, KBBF (KBe 2 BO 3 f 2 ) crystal is currently the only nonlinear optical crystal material that can be applied in the deep ultraviolet band. Its performance meets the requirements for excellent nonlinear optical crystal materials used in the deep ultraviolet band: (1) effective nonlinear optical coefficient; (2) wide light transmission range; (3) moderate birefringence to meet deep ultraviolet (short wavelength at 200nm) phase matching. On August 28, 2020, the Ministry of Commerce of China, together with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B15/00C30B17/00C30B29/12G02F1/355
CPCC30B15/00C30B17/00C30B29/12G02F1/3551
Inventor 王颖刘红坤李玲
Owner HEBEI UNIVERSITY
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