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Cesium tungsten-tellurite crystal as well as flux growth method and application thereof

A technology of crystal growth and flux, applied in the directions of crystal growth, single crystal growth, single crystal growth, etc., can solve the problems of crystal quality and unsuccessful analysis of crystal structure, and achieve the effect of wide application prospects.

Inactive Publication Date: 2015-04-29
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In 2003, P.Shiv Halasyamani's research group synthesized polycrystalline cesium telluride tungstate for the first time by hydrothermal method, but the crystal structure was not successfully analyzed due to crystal quality problems
So far, except for the polycrystals obtained by the hydrothermal method in the above reports, there have been no reports on the growth, property testing and application of cesium telluride tungstate crystals at home and abroad.

Method used

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  • Cesium tungsten-tellurite crystal as well as flux growth method and application thereof
  • Cesium tungsten-tellurite crystal as well as flux growth method and application thereof
  • Cesium tungsten-tellurite crystal as well as flux growth method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Cs 2 CO 3 , TeO 2 and WO 3 Ingredients according to stoichiometric ratio, mixed evenly, directly added to the flux system TeO 2 -WO 3 (TeO 2 : WO 3 The molar ratio is 2:2.5), the Cs 2 CO 3 , TeO 2 、WO 3 The molar ratio to the total compound in the flux is 1:1:3:1, put it into a platinum crucible with a volume of Φ50mm×70mm, raise the temperature to 750°C to melt the raw material and form a uniform melt; cool down to the saturation point, at this time The preheated platinum wire was lowered, and the temperature was lowered at a cooling rate of 1°C / h, and the growth cycle was 10 days. It was proposed that the platinum wire could obtain multiple light yellow flaky crystals ( image 3 ), there are more miscellaneous crystals in the contact with the platinum wire, because there are more nucleation points here, which are easy to generate miscellaneous crystals, and the crystal quality is obviously better at the place far away from the platinum wire. Test its X-ray ...

Embodiment 2

[0057] Cs 2 CO 3 , TeO 2 and WO 3 Ingredients according to stoichiometric ratio, mixed evenly, directly added to the flux system TeO 2 -WO 3 (TeO 2 : WO 3 The molar ratio is 2:2.5), the Cs 2 CO 3 , TeO 2 、WO 3 The molar ratio to the total compound in the flux is 1:1:3:3, put it into a platinum crucible with a volume of Φ50mm×70mm, raise the temperature to 750°C to melt the raw material and form a uniform melt; cool down to the saturation point, at this time Put the preheated seed crystal (taken from Example 1) into the melt, and lower the temperature at a cooling rate of 0.5°C / h. The growth cycle is 20 days, and a light yellow block single crystal ( Figure 4 ), test its X-ray diffraction pattern, it is consistent with the theoretical calculation, and it is proved that the cesium telluride tungstate crystal of the hexagonal system is obtained.

[0058] The single crystal cesium telluride tungstate obtained in Example 2 is oriented processed into flakes of required s...

Embodiment 3

[0061] Cs 2 CO 3 , TeO 2 and WO 3 Ingredients according to stoichiometric ratio, mixed evenly, directly added to the flux system TeO 2 -WO 3 (TeO 2 : WO 3 The molar ratio is 2:3), the Cs 2 CO 3 , TeO 2 、WO 3 The molar ratio to the total compound in the flux is 1:1:3:5, put it into a platinum crucible with a volume of Φ50mm×70mm, raise the temperature to 750°C to melt the raw materials and form a uniform melt; cool down to the saturation point, at this time Put the preheated seed crystal into the melt, and lower the temperature at a cooling rate of 0.3°C / h. The growth cycle is 30 days, and a light yellow block single crystal ( Figure 5 ), test its X-ray diffraction pattern, it is consistent with the theoretical calculation, and it is proved that the cesium telluride tungstate crystal of the hexagonal system is obtained.

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Abstract

The invention relates to a flux growth method and an application of a cesium tungsten-tellurite crystal. The cesium tungsten-tellurite crystal has a chemical formula of Cs2TeW3O12 and belongs to a hexagonal system, the space group refers to P63, the ultraviolet-visible-near infrared transmission spectrum and intermediate infrared transmission spectrum show that the crystal can penetrate through a wavelength range of 430-5350nm, and the transmittance can be over 80 percent under the uncoated condition; an infrared laser incidence crystal with the wavelength of 1064nm generated by using an Nd:YAG laser generates strong green light. Compared with the Cs2TeW3O12 polycrystalline synthetic technology reported in the existing literature, a flux growth method for growing high-quality Cs2TeW3O12 single crystals is provided at first internationally, the crystal structure is successfully analyzed, and the Cs2TeW3O12 single crystal of which the size is enough to meet the application is obtained.

Description

technical field [0001] The invention relates to a novel nonlinear optical crystal and its growth and application, in particular to a cesium telluride tungstate crystal and its flux growth method and application, belonging to the technical field of crystal materials. Background technique [0002] The nonlinear optical effect is the result of the interaction between the electric field of the incident light wave and the molecules or groups in the crystal. Inorganic nonlinear optical crystal materials occupy a dominant position in second-order nonlinear optical materials, and many inorganic materials have been commercially available. Since P.A.Franken et al first observed the optical second harmonic wave through a quartz crystal with a ruby ​​laser in 1961, the development of nonlinear optics has been extremely rapid. From the technical field to the research field, the application of nonlinear optics is very extensive. For example: ① Use various nonlinear crystals to make elect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/32C30B15/00H01S3/16
CPCC30B29/32C30B15/00H01S3/1675
Inventor 陶绪堂赵鹏孙友轩张承乾夏盛清
Owner SHANDONG UNIV
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