Neodymium-doped strontium fluoride laser transparent ceramic and preparation method thereof

A technology of laser transparency and strontium fluoride, which is applied in the research field of advanced light-functional transparent ceramics, to achieve the effects of improving transmittance, high-concentration doping, and enhancing fluorescence emission intensity

Inactive Publication Date: 2018-11-13
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to some insurmountable shortcomings of laser crystals, material scientists have been exploring new solid-state laser materials

Method used

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  • Neodymium-doped strontium fluoride laser transparent ceramic and preparation method thereof
  • Neodymium-doped strontium fluoride laser transparent ceramic and preparation method thereof
  • Neodymium-doped strontium fluoride laser transparent ceramic and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A neodymium-strontium-doped calcium fluoride laser ceramic, the preparation method of which comprises the following steps:

[0041] 1) Weigh 0.0796molSr(NO 3 ) 2 4H 2 O, 0.0042molNd(NO 3 ) 3 ·6H 2 O was dissolved in 80ml water and stirred with a magnetic stirrer to prepare a cationic mixture; weigh 0.175molKF·2H 2 O was dissolved in 100ml water and stirred with a magnetic stirrer to prepare anion solution;

[0042] 2) will be dissolved with F - The anion solution of the dissolved Sr was dropped dropwise at a speed of 90ml / min 2+ and Nd 3+ After the titration is completed, stir with a magnetic stirrer for 30 minutes to make it fully react, and the resulting product appears to be stratified after standing for 7 hours, and the precipitate sinks to the bottom (the red wet gel is Nd in the lower layer. 3+ :SrF 2 , that is the desired product, the following examples are the same);

[0043] 3) The product obtained in step 2) was ultrasonically cleaned, and centrifug...

Embodiment 2

[0051] A neodymium-strontium-doped calcium fluoride laser ceramic, the preparation method of which comprises the following steps:

[0052] 1) Weigh 0.0637molSr(NO3 ) 2 4H 2 O, 0.0033molNd(NO 3 ) 3 ·6H 2 O was dissolved in 80ml water and stirred with a magnetic stirrer to prepare a cationic mixture; weigh 0.0764molKF·2H 2 O was dissolved in 100ml water and stirred with a magnetic stirrer to prepare anion solution;

[0053] 2) will be dissolved with F - The anion solution of the dissolved Sr was dropped dropwise at a speed of 80ml / min 2+ and Nd 3+ In the cationic solution, after the titration is completed, stir with a magnetic stirrer for 30 minutes to make it fully react, and the resulting product appears to be stratified after standing for 6 hours, and the precipitate sinks to the bottom;

[0054] 3) The product obtained in step 2) was ultrasonically cleaned, and centrifuged (15min, 4 times) under the condition of 11000r / min with a TG16-WS desktop high-speed centrifuge...

Embodiment 3

[0062] A neodymium-doped strontium fluoride laser transparent ceramic, the preparation method of which comprises the following steps:

[0063] 1) Weigh 0.0398molSr(NO 3 ) 2 4H 2 O, 0.0020molNd(NO 3 ) 3 ·6H 2 O was dissolved in 80ml water and stirred with a magnetic stirrer to prepare a cationic mixture; weigh 0.0520molKF·2H 2 O was dissolved in 100ml water and stirred with a magnetic stirrer to prepare anion solution;

[0064] 2) will be dissolved with F - The anion solution of the dissolved Sr was dropped dropwise at a speed of 70ml / min 2+ 、Nd 3+ In the cation solution, after the titration is completed, stir with a magnetic stirrer for 30 minutes to make it fully react, and the resulting product appears to be stratified after standing for 5 hours, and the precipitate sinks to the bottom;

[0065] 3) The product obtained in step 2) was ultrasonically cleaned, and centrifuged (15min, 4 times) under the condition of 11000r / min with a TG16-WS desktop high-speed centrifug...

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Abstract

The invention relates to a neodymium-doped strontium fluoride laser transparent ceramic. According to the invention, neodymium ions and a strontium fluoride matrix undergo a chemical reaction to form a displacement solid solution, and hot-pressing sintering, post-treatment and other operations are carried out so as to obtain the laser transparent ceramic with a density approximate to 99.8%. A preparation method for the laser transparent ceramic comprises the following steps: preparing Nd<3+>: SrF2 nanometer powder by using an azeotropic distillation process and then carrying out azeotropic distillation with n-butanol as an entrainer to maximally remove moisture in gel, wherein obtained powder is not prone to agglomeration, has uniform particle size distribution, and has a grain size of 15 to 30 nm; and preparing the laser transparent ceramic by using vacuum hot-pressing sintering technology with LiF as a sintering aid. The prepared laser transparent ceramic has maximum transmittance of 85.83% in visible and near-infrared wave bands and has strong absorption peaks at 576 nm, 735 nm and 796 nm. The preparation method is simple, suitable for large-scale production and low in cost; and the prepared laser transparent ceramic has good optical homogeneity.

Description

technical field [0001] The invention belongs to the research field of advanced optical functional transparent ceramics, and specifically relates to a neodymium-doped strontium fluoride laser transparent ceramic and a preparation method thereof. Background technique [0002] Since Maiman developed the first ruby ​​solid-state laser in 1960 (reference Maiman TH.Optical and microwave-optical experiments in ruby.Phys.Rev.Lett., 1960,4(11):564-566), solid-state laser technology has been rapidly develop. Among all solid-state laser materials, YAG crystal has the best overall performance. However, due to some insurmountable shortcomings of laser crystals, material scientists have been exploring new solid-state laser materials. In 1964, Hatch (references Hatch S E, Parsons W F, Weagley R J.Hot pressed polycrystalline CaF 2 : Dy 2+ laser.Appl.Phys.Lett., 1964,5(8):153-154) with DyF 3 and CaF 3 The powder is used as raw material, which is melted in vacuum and crushed into a powd...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/553C04B35/624C04B35/64C04B35/645
CPCC04B35/553C04B35/624C04B35/64C04B35/645C04B2235/3224C04B2235/5454C04B2235/9653
Inventor 宋京红房亚华梅炳初朱春辉张紫微周志伟
Owner WUHAN UNIV OF TECH
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