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Inorganic compound, application thereof as nonlinear optical crystal material and preparation

An inorganic compound and nonlinear optics technology, which is applied in the field of new nonlinear optical crystals, can solve the problems of slow development of nonlinear crystals, affecting practical use, and difficulties in crystal growth, and achieves large nonlinear optical effects, not easy to deliquescence, and easy to process and save the effect

Pending Publication Date: 2019-04-12
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The development of nonlinear crystals in the infrared band is relatively slow; the materials in the infrared region are mostly ABC 2 Type chalcopyrite structure semiconductor materials, such as AgGaQ 2 (Q=S, Se, Te), the light damage threshold of infrared nonlinear crystal is too low and the crystal growth is difficult, which directly affects the actual use

Method used

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  • Inorganic compound, application thereof as nonlinear optical crystal material and preparation
  • Inorganic compound, application thereof as nonlinear optical crystal material and preparation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] The nonlinear optical crystal K was prepared by spontaneous crystallization from high-temperature melt 2 CaB 4 crystal, comprising the steps of:

[0055] Weigh 1.103 g K 2 S, 1.694 g BaS and 1.828 g SnS 2 (i.e. K 2 S:BaS:SnS 2 =0.01mol:0.01mol:0.01mol), after mixing evenly, put it into a quartz glass tube of Φ12mm×20mm, and evacuate to 10 -3 After that, it was packaged with an oxyhydrogen flame and placed in a tubular growth furnace, raised to 950°C at a rate of 1°C / min, kept at a constant temperature for 72 hours, then slowly cooled to room temperature at a rate of 1°C / h, and the tubular growth furnace was turned off; Cut the quartz tube after cooling to obtain a colorless, non-fragile, non-deliquescent K 2 CaB 4 crystals.

Embodiment 2

[0057] The nonlinear optical crystal K was prepared by the crucible drop method 2 CaB 4 crystal, comprising the steps of:

[0058] Weigh 1.103 g K 2 S, 1.694 g BaS and 1.828 g SnS 2 (i.e. K 2 S:BaS:SnS 2 =0.01mol:0.01mol:0.01mol), after mixing evenly, put it into a quartz glass tube of Φ25mm×200mm, and vacuumize it to 10 -3 After that, it is packaged with an oxygen-hydrogen flame and placed in a crystal growth furnace, and the raw material is melted at 1°C / min to 950°C. After the raw material is completely melted, the growth furnace drops vertically at a speed of 0.5mm / h; the crystal growth is over. Afterwards, the growth device was lowered to room temperature for 50 hours to obtain a colorless K 2 CaB 4 crystals.

Embodiment 3

[0060] Repeat Example 1, the difference is that the cooling rate is changed to 4°C / h, and the other conditions remain unchanged, and the colorless K 2 CaB 4 crystals.

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Abstract

The invention discloses an inorganic compound having a chemical formula of K2BaSnS4, belonging to a hexagonal system, having a space group of R3c, and having unit cell parameters as follows: a=b=25.419(4) angstrom, c=7.4974(15) angstrom, alpha=beta=90 degrees, gamma=120 degrees, and Z=18. The inorganic compound is an infrared nonlinear optical crystal K2BaSnS4, and has the advantages of large nonlinear optical effect, wide light transmission range, stable physical and chemical properties, high hardness, good mechanical properties, uneasiness to break, uneasiness for deliquescence, and easinessto process and save, and the like. The invention also discloses preparation and application of the inorganic compound.

Description

technical field [0001] The invention relates to a novel nonlinear optical crystal. More specifically, it relates to an inorganic compound, an inorganic compound, its use as a nonlinear optical crystal material and its preparation. Background technique [0002] Crystals with nonlinear optical effects are called nonlinear optical crystals. Here nonlinear optical effects refer to effects such as frequency doubling, sum frequency, difference frequency, and parametric amplification. Nonlinear optical effects are only possible in crystals that do not have a center of symmetry. Using the nonlinear optical effect of crystals, nonlinear optical devices such as second harmonic generators, up and down frequency converters, and optical parametric oscillators can be made. The laser generated by the laser can be frequency converted by nonlinear optical devices, so as to obtain more useful wavelengths of laser light, so that the laser can be used more widely. According to the different...

Claims

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Application Information

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IPC IPC(8): C30B29/46C30B11/02
CPCC30B11/02C30B29/46
Inventor 姚吉勇罗晓宇李壮郭扬武
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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