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Compound lithium sodium vanadate optical crystal and its preparation method and use

A lithium-sodium vanadate and optical crystal technology, which is applied in chemical instruments and methods, optics, crystal growth, etc., can solve the problems of easy dissociation, low crystal utilization rate, difficult artificial synthesis of icelandite crystals, etc., and achieve easy cutting , The effect of moderate mechanical hardness

Active Publication Date: 2018-03-09
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these materials also have shortcomings, for example, YVO 4 Due to the difficulty in the crystal growth process, it is not easy to obtain high-quality crystals; Icelandic stone crystals are difficult to synthesize and easy to dissociate; α-BaB 2 o 4 Due to the presence of solid-state phase transitions, it is easy to crack during crystal growth; all in all, these birefringent materials that exist are either unable to meet the requirements of hair-sized optical polarizers, have low crystal utilization, or are difficult to grow

Method used

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  • Compound lithium sodium vanadate optical crystal and its preparation method and use
  • Compound lithium sodium vanadate optical crystal and its preparation method and use
  • Compound lithium sodium vanadate optical crystal and its preparation method and use

Examples

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Embodiment 1

[0028] According to the reaction formula Li 2 CO 3 +2NaNO 3 +2V 2 o 5 →2LiNaV 2 o 6 +CO 2 +N 2 o 5 ↑Synthesis of lithium sodium vanadate (LiNaV 2 o 6 ) compound:

[0029]a. Weigh lithium carbonate, sodium nitrate and vanadium pentoxide in a molar ratio of 1:2:2, put them into a mortar, mix and grind them carefully, then put them into an open corundum crucible with a diameter of Φ100mm×100mm, and place them Press it tightly, put it into the muffle furnace, slowly raise the temperature to 350°C, keep the temperature for 12 hours, drive out the gas as much as possible, take out the crucible after cooling, at this time the sample is softer than before, take out the sample and grind it evenly, and then put it in the crucible In the muffle furnace, keep the temperature at 500°C for 48 hours, take it out, put it into a mortar, crush and grind it to get the single-phase polycrystalline powder of sodium lithium vanadate compound, and then analyze the polycrystalline powder b...

Embodiment 2

[0036] According to the reaction formula Li 2 CO 3 +Na 2 CO 3 +2V 2 o 5 →LiNaV 2 o 6 +CO 2 ↑ Synthesis of LiNaV 2 o 6 Compound:

[0037] a. Weigh lithium carbonate, sodium carbonate and vanadium pentoxide in a molar ratio of 1:1:2, put them into a mortar, mix and grind carefully, then put them into an open corundum crucible with a diameter of Φ100mm×100mm, and place them Press it tightly, put it into the muffle furnace, slowly raise the temperature to 350°C, keep the temperature for 12 hours, drive out the gas as much as possible, take out the crucible after cooling, at this time the sample is softer than before, take out the sample and grind it evenly, and then put it in the crucible In the muffle furnace, keep the temperature at 500°C for 48 hours, take it out, put it into a mortar, crush and grind it to get the single-phase polycrystalline powder of sodium lithium vanadate compound, and then analyze the polycrystalline powder by X-ray, the obtained X Ray spectrum...

Embodiment 3

[0044] According to the reaction formula 2LiOH+Na 2 CO 3 +2V 2 o 5 →2LiNaV 2 o 6 +CO 2 ↑+H 2 O ↑ Synthesis of LiNaV 2 o 6 Compound:

[0045] a. Weigh lithium hydroxide, sodium carbonate and vanadium pentoxide in a molar ratio of 2:1:2, put them into a mortar, mix and grind them carefully, then put them into an open corundum crucible of Φ100mm×100mm, put Press it tightly, put it into the muffle furnace, slowly raise the temperature to 350°C, keep the temperature for 12 hours, drive out the gas as much as possible, take out the crucible after cooling, at this time the sample is softer than before, take out the sample and grind it evenly, and then place In a crucible, keep the temperature in a muffle furnace at 500°C for 48 hours, take it out, put it into a mortar, smash and grind it to get a single-phase polycrystalline powder of lithium sodium vanadate compound, and then conduct X-ray analysis on the polycrystalline powder to obtain X-ray spectrum and finished LiNaV ...

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Abstract

The invention relates to a compound lithium sodium vanadate optical crystal and its preparation method and application. The chemical formula of the crystal is LiNaV2O6, the molecular weight is 227.81, it belongs to the monoclinic system, the space group is C2 / c, and the unit cell parameter is a=10.184( 2)Å, b=9.067(2)Å, c=5.8324(11)Å, β=108.965(14)o, Z=2, V=509.33(19)Å3, birefringence Δn=0.136, light transmission band Between 350nm and 2500nm, synthesized by solid-state reaction method and grown by high-temperature melt method, the crystal has moderate mechanical hardness, easy to cut, polish, process and store, insoluble in water, non-deliquescent, stable in air, suitable for making optical communication Components, polarizing prisms for various purposes, phase delay devices and electro-optic modulation devices, such as Glan prisms, polarizing beam splitters, compensators, optical isolators, circulators and optical modulators, etc. These devices take advantage of the refractive index properties of crystals, specifically their large birefringence.

Description

technical field [0001] The present invention relates to the chemical formula LiNaV 2 o 6 The compound lithium sodium vanadate optical crystal, the preparation method of the crystal and the optical device made by the crystal. Background technique [0002] With the rapid development of the laser industry and optical fiber communication, it is extremely urgent to find a new birefringent material with good performance. Birefringence is one of the important properties of light propagating in optically inhomogeneous dielectric crystals. When light propagates in optical heterogeneous bodies (such as crystals of trigonal crystal system, tetragonal crystal system, triclinic crystal system, etc.) (except along the optical axis), it will change its vibration characteristics and decompose into two electric fields The vector vibration directions are perpendicular to each other, the propagation speed is different, and the two beams of polarized light with different refractive indices, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/30C30B15/00G02B1/08
Inventor 潘世烈孔庆荣杨云刘莉莉
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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