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Selenium gallium cadmium barium compound and its preparation method, selenium gallium cadmium barium crystal and its preparation method and application

A technology of barium compound, gallium selenium cadmium, which is applied in barium selenium gallium cadmium compound and its preparation, barium selenium gallium cadmium crystal and its preparation field, can solve the inability to achieve phase matching output infrared laser, the difficulty of high-quality large-size crystal growth, Low laser damage threshold and other issues, to achieve the effect of wide infrared light transmission band, low cost, and good mechanical properties

Active Publication Date: 2018-09-25
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the only infrared nonlinear crystal that can be used in infrared solid-state lasers is ZnGeP 2 , AgGaS 2 and AgGaSe 2 And so on, there are still serious shortcomings, such as AgGaS 2 and AgGaSe 2 There is a large anisotropic thermal expansion, and it is difficult to grow high-quality large-size crystals; it has strong linear absorption and two-photon absorption in the near-infrared band and low thermal conductivity, which will generate strong heat when pumped at high power. Gradient and thermal lensing result in extremely low laser damage threshold; in addition AgGaSe 2 The birefringence of the crystal at 1 μm is too small to achieve phase matching output infrared laser; ZnGeP, known as the king of infrared nonlinear crystals 2 Crystal is currently the best material for generating 3-5 μm infrared lasers, but its residual absorption in the near-infrared region makes it necessary to use lasers with a wavelength greater than 2 μm for pumping; the above shortcomings seriously limit the application of the above materials

Method used

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  • Selenium gallium cadmium barium compound and its preparation method, selenium gallium cadmium barium crystal and its preparation method and application
  • Selenium gallium cadmium barium compound and its preparation method, selenium gallium cadmium barium crystal and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0045] Using 5BaSe+CdSe+3Ga 2 Se 3 = Ba 5 CdGa 6 Se 15 The reaction formula uses a high-temperature solid-state reaction method to prepare barium selenium gallium cadmium compound;

[0046] The BaSe is 10.815 grams, the CdSe is 1.914 grams, and the Ga 2 Se 3 It is 11.290 grams; namely BaSe:CdSe:Ga 2 Se 3 =0.05mol:0.01mol:0.03mol;

[0047] The specific operation steps are: weigh the reagents according to the above dosage in the glove box, put them into a mortar, mix and grind them, then put them into a Φ19mm×25mm quartz tube, and evacuate them to 10 -3 After Pa, the quartz tube was melted and packaged with a hydrogen-oxygen flame, put into a muffle furnace, and slowly raised to 750°C with a heating rate of 30°C / h, kept for 96h, taken out after cooling, and ground into a mortar to obtain a powder State Ba 5 CdGa 6 Se 15 compound.

Embodiment 2

[0049] Using 5BaSe+Cd+6Ga+10Se=Ba 5 CdGa 6 Se 15 The reaction formula uses a high-temperature solid-state reaction method to prepare barium selenium gallium cadmium compound;

[0050] The BaSe is 10.815 grams, the Cd is 1.124 grams, the Ga is 4.183 grams, and the Se is 7.896 grams, that is, BaSe:Cd:Ga:Se=0.05mol:0.01mol:0.06mol:0.10mol;

[0051] The specific operation steps are to weigh the reagents in the glove box according to the above doses, put them into a Φ19mm×25mm quartz tube, and evacuate to 10 -3 After Pa, the quartz tube was melted and packaged with a flame, put into a muffle furnace, slowly raised to 850°C, the heating rate was 10°C / h, and kept for 96h, after cooling, the sample was taken out, ground and mixed, and then placed in the quartz tube Vacuumize the package in a tube, sinter in a muffle furnace at 850°C for 48 hours, the sample shrinks into a block; take it out, put it in a mortar, smash and grind it to get powdered BaGa 2 GeSe 6 compound.

Embodiment 3

[0053] Using 5BaSe+Cd+3Ga 2 Se 3 +Se=Ba 5 CdGa 6 Se 15 ; Reaction formula prepares selenium gallium cadmium barium compound with high temperature solid state reaction method;

[0054] The BaSe is 10.815 grams, the Cd is 1.124 grams, the Se is 0.790 grams, and the Ga 2 Se 3 It is 11.290 grams, namely BaSe:Cd:Ga 2 Se 3 : Se=0.05mol:0.01mol:0.03mol:0.01mol;

[0055] The specific operation steps are as follows: weigh the reagents in the glove box according to the above dosage, put them into a mortar, mix and grind them, then put them into a Φ19mm×25mm quartz tube, and evacuate to 10 -3 After Pa, the quartz tube is melted and packaged with a flame, put into a muffle furnace, and slowly raised to 800°C, the heating rate is 10°C / h, and the temperature is kept constant for 96h. After cooling, take it out, put it into a mortar, smash and grind to obtain a powder State Ba 5 CdGa 6 Se 15 compound.

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Abstract

The invention discloses a selenium-gallium-cadmium-barium compound and a preparation method thereof, and a selenium-gallium-cadmium-barium crystal as well as a preparation method and application thereof. The chemical formula of the selenium-gallium-cadmium-barium compound is Ba5CdGa6Se15; the selenium-gallium-cadmium-barium compound is formed by that a Ba-containing substance, a Cd-containing substance, a Ga-containing substance and an elemental Se are proportioned according to a certain molar ratio and are uniformly mixed and subjected to high-temperature solid-phase reaction; the chemical formula of the selenium-gallium-cadmium-barium crystal is Ba5CdGa6Se15, the crystal is of a non-centrosymmetric structure and belongs to an orthogonal crystal system, and the space group is Ama2; the crystal is prepared by using the selenium-gallium-cadmium-barium compound by a horizontal gradient condensation method or a crucible descent method, the crystal growth speed is high, the cost is low, and large-size crystals can be easily obtained. The crystal has a relatively wide light-transmitting wave band, high hardness and good mechanical property, hard to break and slake, and easy to process and store and the like.

Description

technical field [0001] The invention relates to the field of inorganic materials, in particular to a selenium-gallium-cadmium-barium compound and a preparation method thereof, a selenium-gallium-cadmium-barium crystal and a preparation method and application thereof. Background technique [0002] The development of all-solid-state infrared lasers, especially the 3-5μm and 8-14μm "atmospheric window" bands, is one of the most important development directions in the field of international laser technology, and infrared nonlinear crystals are the core components to achieve laser output in this band. All solid-state infrared lasers can not only be used in civilian fields such as laser communication, medical diagnosis and treatment, laser surgery, and earth remote sensing detection; field. [0003] At present, the further development of solid-state infrared lasers requires a major breakthrough in the research of infrared nonlinear optical crystals. Using infrared nonlinear opti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B19/00C30B11/00C30B29/46G02F1/35G02F1/355
CPCC01B19/002C30B11/00C30B29/46G02F1/353G02F1/3551
Inventor 尹文龙余盛全唐明静张羽袁泽锐窦云巍方攀陈莹康彬邓建国
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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