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A kind of ultraviolet crystal material ba[bo(oh)2]f and its preparation method and application

A technology for crystal materials and applications, applied in the field of new second-order nonlinear ultraviolet optical crystal materials and their synthesis, can solve the problems of difficult preparation of pure phases, low synthesis temperature, and further improvement of nonlinear coefficients, and achieve mild conditions and methods simple effect

Active Publication Date: 2019-03-15
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, most of these materials are prepared by high-temperature solid-phase synthesis, and the compound raw materials contain highly toxic element beryllium, and the pure phase is difficult to prepare, and the nonlinear coefficient needs to be further improved.
[0003] This application further broadens the research on the ternary borate system, and uses the synthetic method of surfactant heat for the first time to combine alkaline earth metal and F - The ions were introduced into the borate system at the same time, and a new type of ternary borate Ba[BO(OH) 2 ]F, the preparation method is simple, the synthesis temperature is low and there is a higher second-order nonlinear coefficient, the preparation method and related work have not been reported so far

Method used

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  • A kind of ultraviolet crystal material ba[bo(oh)2]f and its preparation method and application
  • A kind of ultraviolet crystal material ba[bo(oh)2]f and its preparation method and application
  • A kind of ultraviolet crystal material ba[bo(oh)2]f and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0030] Example 1 sample preparation

[0031] Mix the barium source, boron source, fluorine source, edetate disodium, water and acetonitrile in a certain proportion to obtain the initial gel mixture, and seal the initial gel mixture in a 30mL polytetrafluoroethylene-lined hydrothermal In the reaction kettle, put it into a box-type resistance furnace, crystallize at the crystallization temperature for a period of time, filter, wash, and dry to obtain a colorless flaky Ba[BO(OH) 2 ] F crystal samples. Table 1 shows the relationship between the types and ratios of raw materials in the initial gel mixture, crystallization temperature, crystallization time, and sample numbers.

[0032] Table 1 Relationship between sample synthesis conditions and sample numbers

[0033]

Embodiment 2

[0034] The crystal structure analysis of embodiment 2 sample

[0035] The structures of samples 1# to 10# were analyzed by single crystal X-ray diffraction and powder X-ray diffraction.

[0036] The single crystal X-ray diffraction was carried out on a SuperNova CCD X-ray single crystal diffractometer of Agilent Company, USA. The crystal size is 0.12×0.05×0.02mm 3 ; The data collection temperature is 293K, and the diffraction light source is the Mo-Kα ray (λ=0.71073 ), the scanning mode is ω-2θ; the data is processed by the Multi-Scan method for absorption correction. Structural analysis was completed using the SHELXTL-97 program package; the position of the heavy atom was determined by the direct method, and the coordinates of the remaining atoms were obtained by the difference Fourier synthesis method; 2 The full-matrix least-squares method was used to refine all atomic coordinates and anisotropic thermal parameters.

[0037] Powder X-ray diffraction was carried out on M...

Embodiment 3

[0044] Embodiment 3 frequency doubling test experiment and result

[0045] The frequency doubling test experiment of sample 1# is as follows: the laser with a wavelength of 1064nm generated by a Q-switched Nd:YAG solid-state laser is used as the fundamental frequency light, and the crystal powder to be tested is irradiated, and the secondary frequency of 532nm produced by photomultiplier tubes is detected. Harmonics, use an oscilloscope to display the strength of the harmonics. Grind the crystal sample to be tested and the standard sample KDP crystal, and use a standard sieve to screen crystals of different particle sizes, the particle sizes are 25-45, 45-53, 53-75, 75-105, 105-150, 150-210 , 210-300μm. Observe the change trend of the multiplier signal with the particle size, and judge whether it can achieve phase matching. Under the same test conditions, compare the intensity of the second harmonic generated by the sample with the intensity of the second harmonic generated ...

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Abstract

The invention discloses an ultraviolet crystal material Ba[BO(OH)2]F, and a preparation method and application thereof. The chemical formula of the crystal material is Ba[BO(OH)2]F; the crystal material belongs to a tetragonal system; the space group is P-4m2; and the cell parameters are as follows: a=b=4.2-4.4A, c=12.9-13.1A, alpha=beta=gamma=90 degrees, and Z=4. The crystal material has second-order nonlinear frequency-doubled effect which is about 0.8 time of the KDP (potassium dihydrogen phosphate) crystal. Besides, the crystal material has wider transmission range, the ultraviolet transmission cutoff is about 330nm, and thus, the crystal material has wide application prospects in the fields of second-order nonlinear optics, electrooptical modulation, optical communication information processing and the like.

Description

technical field [0001] The application relates to a novel second-order nonlinear ultraviolet optical crystal material and a synthesis method thereof. Background technique [0002] Second-order nonlinear optical crystals are an important class of optoelectronic functional materials. Such crystals have a frequency doubling effect (SHG), which can change the energy of laser light, and are widely used in frequency doubling devices, photoelectric modulation, and holographic storage communication components. Alkali metal or alkaline earth metal borates with a non-core structure have a wide transmission band, which can be extended to the ultraviolet or even deep ultraviolet region (λ<200nm, Eg>6.2eV), which has attracted extensive interest of researchers at home and abroad. The current research focus is mainly to introduce alkali metals or alkaline earth metals and halogen fluorine atoms into the same system to increase the band gap of the compound, thereby expanding the tran...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/10C30B5/00G02F1/355
CPCC30B5/00C30B29/10G02F1/3551
Inventor 宋俊玲郭钿烁张弛
Owner JIANGNAN UNIV