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Europium iodate monohydrate infrared nonlinear optical crystal material and preparation and application thereof

A europium iodate monohydrate and nonlinear optics technology, applied in nonlinear optics, polycrystalline material growth, optics, etc., can solve the problem of lack of infrared nonlinear optical crystal materials

Active Publication Date: 2020-09-29
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the current lack of practically applicable infrared nonlinear optical crystal materials, and provide a kind of mid-infrared nonlinear optical crystal material with good performance - europium iodate monohydrate and its preparation and application

Method used

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  • Europium iodate monohydrate infrared nonlinear optical crystal material and preparation and application thereof
  • Europium iodate monohydrate infrared nonlinear optical crystal material and preparation and application thereof
  • Europium iodate monohydrate infrared nonlinear optical crystal material and preparation and application thereof

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Experimental program
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Effect test

Embodiment 1

[0032] Preparation of 1#~6# samples of europium iodate monohydrate infrared nonlinear optical crystal material:

[0033] Mix europium source, iodine source, tetrafluoroboric acid and water according to a certain ratio to form the initial mixed raw material, seal it in a hydrothermal reaction kettle with a polytetrafluoroethylene liner, raise the temperature to the crystallization temperature, keep the temperature for a period of time, and Slowly lower the temperature of the reaction system to room temperature at a certain rate, and filter and wash to obtain colorless needle-shaped europium iodate monohydrate crystals.

[0034] Table 1 shows the relationship between the type and proportion of each component in the initial mixed raw material, crystallization temperature, crystallization time and sample number.

[0035] Table 1 Correspondence between samples, raw materials and synthesis conditions

[0036]

[0037]

[0038] Crystal structure analysis of 1#~6# samples:

[...

Embodiment 2

[0059] Europium iodate monohydrate infrared nonlinear optical crystal material, the chemical formula of this crystal material is Eu(IO 3 ) 3 ·H 2 O, belonging to the monoclinic crystal system, the space group is P2 1 , the cell parameters are α=γ=90°, β=109.5~110.0°, Z=2, the unit cell volume is

[0060] The preparation method of europium iodate monohydrate infrared nonlinear optical crystal material comprises the following steps:

[0061] (1) mixing europium source, iodine source, tetrafluoroboric acid and water to form an initial mixed raw material;

[0062] (2) Crystallize the initial mixed raw materials under hydrothermal conditions to obtain europium iodate monohydrate infrared nonlinear optical crystal material.

[0063] Wherein, the source of europium is europium trioxide; the source of iodine is iodine pentoxide. In the initial mixed raw materials, the molar ratio of europium element, iodine element, tetrafluoroboric acid and water is 1:1:80:20.

[0064] ...

Embodiment 3

[0067] Europium iodate monohydrate infrared nonlinear optical crystal material, the chemical formula of this crystal material is Eu(IO 3 ) 3 ·H 2 O, belonging to the monoclinic crystal system, the space group is P2 1 , the cell parameters are α=γ=90°, β=109.5~110.0°, Z=2, the unit cell volume is

[0068] The preparation method of europium iodate monohydrate infrared nonlinear optical crystal material comprises the following steps:

[0069] (1) mixing europium source, iodine source, tetrafluoroboric acid and water to form an initial mixed raw material;

[0070] (2) Crystallize the initial mixed raw materials under hydrothermal conditions to obtain europium iodate monohydrate infrared nonlinear optical crystal material.

[0071] Wherein, the source of europium is europium nitrate; the source of iodine is iodic acid. In the initial mixed raw materials, the molar ratio of europium element, iodine element, tetrafluoroboric acid and water is 1:20:0.5:500.

[0072] The ...

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Abstract

The invention relates to a europium iodate monohydrate infrared nonlinear optical crystal material and preparation and application thereof. The chemical formula of the crystal material is Eu (IO3) 3.H2O, the molecular weight is 694.68, the material belongs to the monoclinic system, the space group is P21; cell parameters are shown in the specification, alpha=gamma=90 degrees, beta=109.5-110.0 degrees, Z=2, and the cell volume is shown in the specification. Compared with the prior art, the europium iodate monohydrate infrared nonlinear optical crystal material has excellent optical performance;under the irradiation of 1064nm laser, the powder frequency multiplication intensity is about 4.5 times of that of a potassium dihydrogen phosphate crystal, and the laser damage threshold measured under the laser with the wavelength of 1064nm is 43 times of that of a commercialized infrared second-order nonlinear material silver gallium sulfur. In addition, the crystal material has a very wide transmission range in an ultraviolet-visible light-near infrared region (0.3-2.5 microns) and an infrared region (3.2-10.4 microns), and has a wide application prospect in the fields of laser frequencyconversion, photoelectric modulation, laser signal holographic storage and the like.

Description

technical field [0001] The invention belongs to the technical fields of inorganic chemistry, crystallography and nonlinear optical materials, and relates to an inorganic rare-earth iodate - europium iodate monohydrate infrared nonlinear optical crystal and its preparation and application. Background technique [0002] The second-order nonlinear optical crystal is a photoelectric functional material widely used in the laser field. It has important application value in laser frequency conversion, photoelectric modulation, laser signal holographic storage, and laser communication. At present, the second-order nonlinear optical material that has been practically used is β-barium metaborate (β-BaB 2 o 4 ), lithium borate (LiB 3 o 5 ), Potassium dihydrogen phosphate (KH 2 PO 4 ), potassium titanyl phosphate (KTiOPO 4 ), lithium niobate (LiNbO 3 ), barium titanate (BaTiO 3 ), silver gallium sulfide (AgGaS 2 ), zinc germanium phosphorus (ZnGeP 2 ) etc. Among them, the nonl...

Claims

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Application Information

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IPC IPC(8): C30B29/10C30B7/10G02F1/355
CPCC30B7/10C30B29/10G02F1/3551
Inventor 张弛林霖吴超
Owner TONGJI UNIV
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