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Fluorin boric acid barium sodium ultraviolet birefringent crystal, as well as growth method and application thereof

A technology of barium sodium fluoroborate and birefringent crystal, applied in the direction of crystal growth, single crystal growth, single crystal growth, etc., can solve the problems of poor crystal quality and small transparent area, and achieves reduced viscosity, wide transmission range, Easy-to-process effects

Active Publication Date: 2014-06-11
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

For this birefringent use and its growth method, BaB has previously been used 2 o 4 and NaF two phases are mixed in a certain proportion to grow, and some people directly grow in Ba 2 Na 3 (B 3 o 6 ) 2 On the basis of F, add a certain proportion of BaF 2 Growth as a flux; both methods grow centimeter-sized single crystals, but crystal quality is poor with small transparent areas

Method used

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  • Fluorin boric acid barium sodium ultraviolet birefringent crystal, as well as growth method and application thereof
  • Fluorin boric acid barium sodium ultraviolet birefringent crystal, as well as growth method and application thereof
  • Fluorin boric acid barium sodium ultraviolet birefringent crystal, as well as growth method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: growing Ba by flux method 2 Na 3 (B 3 o 6 ) 2 F birefringent crystal:

[0026] Raw materials used (analytically pure):

[0027]

[0028] The molar ratio of barium: sodium: boron: fluorine in the raw material mixture composed of the above raw materials is 2.1: 3.1: 6: 1.3, which is equivalent to BNBF and BaF 2 The molar ratio with NaF is 1:0.1:0.1;

[0029] The specific steps are as follows: weigh the above-mentioned raw materials and put them into a mortar for mixing and grinding, then put them into a platinum crucible in a crystal growth furnace, heat to a molten state to obtain a mixed melt, stir for 48 hours, and determine by trying the seed crystal method The saturation point temperature of the mixed melt; when the temperature is raised to 3°C above the saturation point temperature, the seed crystal rod with the seed crystal fixed is slowly put into the crystal growth furnace, so that the seed crystal at the lower end of the seed crystal rod c...

Embodiment 2

[0030] Embodiment 2: growing Ba by flux method 2 Na 3 (B 3 o 6 ) 2 F birefringent crystal:

[0031] Raw materials used (analytically pure):

[0032]

[0033] The molar ratio of barium: sodium: boron: fluorine in the raw material mixture composed of the above raw materials is 2.3: 3.2: 6: 1.8, which is equivalent to BNBF and BaF 2 The molar ratio with NaF is 1:0.3:0.2;

[0034] The specific steps are as follows: weigh the above-mentioned raw materials and put them into a mortar for mixing and grinding, then put them into a platinum crucible in a crystal growth furnace, heat to a molten state to obtain a mixed melt, stir for 36 hours, and determine by trying the seed crystal method The saturation point temperature of the mixed melt; when the temperature is raised to 5°C above the saturation point temperature, the seed rod with the seed crystal fixed is slowly put into the crystal growth furnace, so that the seed crystal at the lower end of the seed rod contacts the mixe...

Embodiment 3

[0036] Embodiment 3: growing Ba by flux method 2 Na 3 (B 3 o 6 ) 2 F birefringent crystal

[0037] Raw materials used (analytically pure):

[0038]

[0039] The molar ratio of barium: sodium: boron: fluorine in the raw material mixture composed of the above raw materials is 2.2: 3.3: 6: 1.7, which is equivalent to BNBF and BaF 2 The molar ratio with NaF is 1:0.2:0.3.

[0040] The specific steps are as follows: weigh the above-mentioned raw materials and put them into a mortar for mixing and grinding, then put them into a platinum crucible in a crystal growth furnace, heat to a molten state to obtain a mixed melt, stir for 24 hours, and determine by trying the seed crystal method The saturation point temperature of the mixed melt; when the temperature is raised to 2°C above the saturation point temperature, the seed crystal rod with the seed crystal fixed is slowly put into the crystal growth furnace, so that the seed crystal at the lower end of the seed crystal rod co...

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Abstract

The invention relates to a fluorin boric acid barium sodium ultraviolet birefringent crystal, as well as a growth method and an application thereof. A chemical formula of the fluorin boric acid barium sodium ultraviolet birefringent crystal is Ba2Na3(B3O6)2F and the crystal belongs to a uniaxial negative crystal; a refractive index of the crystal no is greater than ne; an ultraviolet end side is about 185nm; the crystal is moderate in hardness, easy to process and stable in air; the fluorin boric acid barium sodium ultraviolet birefringent crystal can grow by using a co-solvent method or a melt drawing method; the fluorin boric acid barium sodium ultraviolet birefringent crystal has a great birefringence delta n which is equal to no-ne; the birefringence delta n in a wavelength range of 2000nm-185nm is 0.087-0.192; and the fluorin boric acid barium sodium ultraviolet birefringent crystal has important application prospects in optics and optical communication fields and can be used for manufacturing polarization beam splitter prisms which are gland prisms, Wollaston prisms, Rochon prisms or beam splitting polarizers.

Description

technical field [0001] The present invention relates to fluoroborate birefringent crystals that can be used for ultraviolet deep ultraviolet, especially a kind of molecular formula that is used for ultraviolet deep ultraviolet is Ba 2 Na 3 (B 3 o 6 ) 2 Barium sodium fluoroborate (abbreviation: BNBF) birefringent crystal of F and its growth method and application. Background technique [0002] Birefringence refers to the phenomenon that a beam of light is projected onto the surface of a crystal to produce two beams of refracted light. The root cause of this phenomenon is the anisotropy of the crystal material. The birefringence property of crystal is an important optical performance parameter of electro-optic functional crystal materials. Birefringent crystal materials are widely used, mainly in the fields of optics and optical communication. [0003] At present, MgF is mainly used as birefringent crystal material 2 Crystal, TiO 2 Crystal, LiNbO 3 Crystals, Calcite (...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/10C30B29/12C30B15/00
Inventor 李如康王幸
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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