Sulfur-germanium-aluminum-barium compound, preparation method of sulfur-germanium-aluminum-barium compound, sulfur-germanium-aluminum-barium crystal and preparation method and application of sulfur-germanium-aluminum-barium crystal

A barium compound and compound technology, applied in germanium compounds, chemical instruments and methods, crystal growth and other directions, can solve the problems of difficult crystal growth, large anisotropic thermal expansion, low thermal conductivity, etc., and achieve easy processing, preservation, growth and so on. High speed and good mechanical properties

Inactive Publication Date: 2017-05-31
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

However, research on nonlinear optical crystals in the infrared band is still relatively scarce, and only ZGP (ZnGeP 2 ), AGS (AgGaS 2 ) and AGSe (AgGaSe 2 ) and a few
At the same time, these crystals also have serious disadvantages. For example, AGS and AGSe have large anisotropic thermal expansion, and it is difficult to grow high-quality and large-sized crystals; they have strong linear absorption and two-photon absorption in the near-infrared band, and thermal conductivity Low efficiency, strong thermal gradient and thermal lens effect will be generated when pumped at high power, resulting in extremely low laser damage threshold; ZGP crystal, known as the king of infrared nonlinear crystals, is currently the most advanced 3-5 μm infrared laser However, its crystal growth is extremely difficult, and there is an inevitable and severe residual absorption in the near-infrared region, which makes it necessary to use a laser with a wavelength greater than 2 μm for pumping
The above shortcomings seriously limit the practical application of the above infrared crystals

Method used

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  • Sulfur-germanium-aluminum-barium compound, preparation method of sulfur-germanium-aluminum-barium compound, sulfur-germanium-aluminum-barium crystal and preparation method and application of sulfur-germanium-aluminum-barium crystal
  • Sulfur-germanium-aluminum-barium compound, preparation method of sulfur-germanium-aluminum-barium compound, sulfur-germanium-aluminum-barium crystal and preparation method and application of sulfur-germanium-aluminum-barium crystal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Using BaS+2Al+GeS 2 +3S=BaAl 2 GeS 6 The reaction formula is to prepare sulfur germanium aluminum barium compound by high temperature solid state reaction method;

[0044] The BaS is 6.776 grams, the Al is 2.158 grams, the GeS 2 It is 5.470 grams; the S is 3.848 grams; namely BaS:Al:GeS 2 : S=0.04mol:0.08mol:0.04mol:0.12mol;

[0045] 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, raised to 900 °C at a rate of 40 °C / h, and kept for 96 hours. After cooling, the sample was taken out, ground and mixed, and then placed in the quartz tube Medium-pumped vacuum package, sintered in a muffle furnace at 800°C for 72h; take it out, put it into a mortar, crush and grind it to get powdered BaAl 2 GeS 6 c...

Embodiment 2

[0047] Adopt BaS+2Al+Ge+5S=BaAl 2 GeS 6 The reaction formula is to prepare sulfur germanium aluminum barium compound by high temperature solid state reaction method;

[0048] Described BaS is 6.776 grams, and described Al is 2.158 grams, and described Ge is 2.904 grams; Described S is 6.413 grams; Namely BaS:Al:Ge:S=0.04mol:0.08mol:0.04mol:0.20mol;

[0049] 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, raised to 850 °C at a rate of 30 °C / h, and kept for 96 hours. After cooling, the sample was taken out, ground and mixed, and then placed in the quartz tube Medium-pumped vacuum package, sintered in a muffle furnace at 800°C for 72h; take it out, put it into a mortar, crush and grind it to get powdered Ba...

Embodiment 3

[0051] Adopt Ba+2Al+Ge+6S=BaAl 2 GeS 6 The reaction formula is to prepare sulfur germanium aluminum barium compound by high temperature solid state reaction method;

[0052] Described Ba is 5.493 grams, and described Al is 2.158 grams, and described Ge is 2.904 grams; Described S is 7.696 grams; Namely Ba:Al:Ge:S=0.04mol:0.08mol:0.04mol:0.24mol;

[0053] 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 900°C, the heating rate was 20°C / h, and kept for 96h. After cooling, take it out, take out the sample, grind and mix, and then place Vacuumize the package in a tube, sinter in a muffle furnace at 800°C for 72 hours; take it out, put it in a mortar, crush and grind it to obtain powdered BaAl 2 GeS 6 compound.

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Abstract

The invention discloses a sulfur-germanium-aluminum-barium compound, a preparation method of the sulfur-germanium-aluminum-barium compound, a sulfur-germanium-aluminum-barium crystal and a preparation method and application of the sulfur-germanium-aluminum-barium crystal. The chemical formulas of the sulfur-germanium-aluminum-barium compound and the sulfur-germanium-aluminum-barium crystal are both BaAl2GeS6; the sulfur-germanium-aluminum-barium compound is obtained by proportioning a Ba-containing substance, an Al-containing substance, A Ge-containing substance and a simple substance S according to a certain mole ratio, uniformly mixing an obtained mixture and subjecting the mixture to a high-temperature solid phase reaction; the sulfur-germanium-aluminum-barium crystal is of a non-centrosymmetrical structure, and belongs to a trigonal system; a space group is R3; the cell parameters of the sulfur-germanium-aluminum-barium crystal are as shown in the specification; the crystal is obtained by being prepared from the sulfur-germanium-aluminum-barium compound through adopting a horizontal gradient freezing method or a bridgman-stockbarger method; the crystal has potential application value in the field of infrared laser frequency conversion.

Description

technical field [0001] The invention relates to the field of chemical materials, in particular to sulfur germanium aluminum barium compound and its preparation method, sulfur germanium aluminum barium crystal and its preparation method and application. Background technique [0002] Second-order nonlinear optical crystals are a kind of important optoelectronic functional materials that are closely integrated with laser technology, and their crystal structures need to have a non-centrosymmetric structure. This type of crystal can adjust the laser frequency through nonlinear effects such as frequency doubling, difference frequency, sum frequency and optical parametric oscillation, and generate a new laser source, thereby greatly expanding the application range of laser. For example, using a suitable frequency doubling crystal, the Nd:YAG (output wavelength is 1064nm) laser can be frequency doubled to produce a laser with a wavelength of 532nm; the 2.1μm laser can be frequency d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G17/00C30B29/46C30B11/00G02F1/355
CPCC01G17/006C30B11/00C30B29/46G02F1/3551
Inventor 尹文龙余盛全张羽谢婧唐明静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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