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Preparation method and application of lithium borate birefringent crystal

A technology of birefringent crystal and lithium borate, which is applied in the field of preparation of lithium borate birefringent crystal, can solve the problems that can only be used in Rochester prism, small separation angle of light speed, large device size, etc., and achieve easy polishing, easy storage, Ease of grinding effect

Active Publication Date: 2017-06-09
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

MgF 2 The transmission range of the crystal is 110-8500nm, it is a good material for deep ultraviolet, but its birefringence is too small, it is not suitable for making Glan prism, it can only be used for Rochon prism, and The light speed separation angle is small, the device size is large, and it is inconvenient to use

Method used

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  • Preparation method and application of lithium borate birefringent crystal
  • Preparation method and application of lithium borate birefringent crystal
  • Preparation method and application of lithium borate birefringent crystal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1: growing Li by flux method 3 BO 3

[0034] According to the chemical formula: 3Li 2 CO 3 +2H 3 BO 3 → Li 3 BO 3 +CO 2 ↑+H 2 O ↑ Synthesis of lithium borate compound:

[0035] a. Will Li 2 CO 3 、H 3 BO 3 According to the molar ratio of lithium: boron = 3:1, mix well and grind thoroughly, then put it into a corundum crucible, pre-fire at a temperature of 300 ° C for 8 hours, and then raise the temperature by 50 ° C each time and keep it at the corresponding temperature for 6 hours, take it out and grind it. Compact, repeat this process until the temperature rises to 750°C, and finally keep it at 750°C for 120h to obtain a pure phase of lithium borate compound. X-ray analysis is performed on the product, and the obtained X-ray spectrum is consistent with that of Li 3 BO 3 The X-ray spectra of single crystals ground into powders are consistent;

[0036] b. Mix the lithium borate obtained in molar ratio: flux LiCl=1:1, put it into an open platinu...

Embodiment 2

[0039] Embodiment 2: growing Li by flux method 3 BO 3

[0040] According to the chemical equation: 3LiOH+H 3 BO 3 → Li 3 BO 3 +H 2 O ↑ Synthesis of lithium borate compound:

[0041] a. LiOH, H 3 BO 3 According to the molar ratio of lithium: boron = 3:1, mix well and grind thoroughly, then put it into a corundum crucible, pre-fire at a temperature of 300 ° C for 8 hours, and then raise the temperature by 50 ° C each time and keep it at the corresponding temperature for 8 hours, take it out and grind it. Compact, repeat this process until the temperature rises to 750°C, and finally keep it at 750°C for 120h to obtain a pure phase of lithium borate compound. X-ray analysis is performed on the product, and the obtained X-ray spectrum is consistent with that of Li 3 BO 3 The X-ray spectra of single crystals ground into powders are consistent;

[0042] b, the obtained lithium borate in molar ratio: fluxing agent LiOH=1:2 is mixed, packs in the open platinum crucible of Φ7...

Embodiment 3

[0045] Embodiment 3: growing Li by flux method 3 BO 3

[0046] According to the chemical equation: 3Li 2 O+2H 3 BO 3 → Li 3 BO 3 +H 2 O ↑ Synthesis of lithium borate compound:

[0047] a. Will Li 2 O, H 3 BO 3 According to the molar ratio of lithium: boron = 3:1, mix well and grind thoroughly, then put it into a corundum crucible, pre-fire at a temperature of 300°C for 8 hours, and then raise the temperature by 50°C each time and keep it at the corresponding temperature for 7 hours, take it out and grind it. Compact, repeat this process until the temperature rises to 750°C, and finally keep it at 750°C for 120h to obtain a pure phase of lithium borate compound. X-ray analysis is performed on the product, and the obtained X-ray spectrum is consistent with that of Li 3 BO 3 The X-ray spectra of single crystals ground into powders are consistent;

[0048] b, the obtained lithium borate in molar ratio: flux NaCl=1:0.5 is mixed, heated to 750° C., and kept at a constan...

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Abstract

The invention relates to a preparation method and application of a lithium borate birefringent crystal. According to the crystal, the chemical formula is Li3BO3; the molecular weight is 79.63; the crystal belongs to a monoclinic system; the space group is P21 / c; the cell parameters are that a is equal to 3.2637 (8) angstroms; b is equal to 9.180 (2) angstroms; c is equal to 8.319 (2); beta is equal to 101.039 (2) degrees; V is equal to 244.63 (11) angstroms 3; and Z is equal to 4. The crystal is used for infrared-deep ultraviolet bands, is an aniaxial negative crystal, and has a transmission region of 175 to 3,500nm; double refraction ranges from 0.080 (4,500nm) to 0.140 (175nm); and a high-temperature solution method is adopted to grow the crystal. The crystal obtained by the method described in the invention is easy to grow, cut, grind, polish and preserve, stable in air and difficult to airslake, can be used for manufacturing polarized beam splitter prisms such as Glan prisms, Wollaston prisms, Rochon prisms or beam splitting polarizers, and thus has important uses in the fields of optics and communication.

Description

technical field [0001] The invention relates to a preparation method and application of lithium borate birefringent crystals, in particular to a lithium borate crystal whose molecular formula is Li 3 BO 3 Lithium borate birefringent crystal and its preparation method and use. Background technique [0002] Birefringence is one of the important properties of light propagating in inhomogeneous dielectric crystals, which can be explained by the transverse wave properties of light. When light propagates in a heterogeneous body (such as a crystal other than the cubic system), except for a few special directions (along the direction of the optical axis), its vibration characteristics will be changed, and it will be decomposed into two electric field vectors whose vibration directions are perpendicular to each other and the propagation speed Different, two beams of polarized light with unequal refractive index, this phenomenon is called birefringence, and such crystals are called ...

Claims

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Application Information

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IPC IPC(8): C30B9/12C30B29/10G02B5/30
CPCC30B9/12C30B29/10G02B5/3083
Inventor 潘世烈陈幸龙张方方
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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