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Compound barium borate and barium borate optical crystal, preparation method and use

A technology of optical crystals and compounds, applied in chemical instruments and methods, boron oxide compounds, borates, etc., can solve the problems of easy dissociation, high hardness, small size, etc., and achieve the effect of easy cutting and moderate mechanical hardness

Active Publication Date: 2017-04-05
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

However, these materials have disadvantages. For example, calcite crystals are difficult to synthesize artificially and are easy to dissociate; 2 Crystal and LiNbO 3 The crystal birefringence is too small; YVO 4 Crystals have many difficulties in the growth process, and it is not easy to obtain high-quality crystals; α-BaB 2 o 4 Easily cracks during crystal growth due to solid-state phase transitions
In short, these existing birefringent materials either cannot meet the requirements of large-scale optical polarizing elements, have low crystal utilization, or are difficult to grow

Method used

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  • Compound barium borate and barium borate optical crystal, preparation method and use
  • Compound barium borate and barium borate optical crystal, preparation method and use
  • Compound barium borate and barium borate optical crystal, preparation method and use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Synthetic barium borate (Ba 2 B 10 O 17 ) Compound:

[0031] The compound barium borate is synthesized by solid-phase reaction method, and its chemical equation is:

[0032] 2BaCO 3 +10H 3 BO 3 →Ba 2 B 10 O 17 +15H 2 O↑+2CO 2 ↑;

[0033] Will BaCO 3 And H 3 BO 3 Put it in a mortar with a molar ratio of 1:5, mix and grind it carefully, then put it into an open corundum crucible of Φ400mm×400mm, press it tightly, put it in a muffle furnace, and slowly raise the temperature to 300°C at a constant temperature of 24 Take out the crucible after cooling down. At this time, the sample is harder. Take out the sample and grind it evenly, then place it in the crucible and put it in the muffle furnace at 600℃ for 48 hours. Take it out. Take out the sample and grind it evenly again, place it in a crucible, put it in a muffle furnace at a temperature of 810°C for 72 hours, take out the sample, put it in a mortar, mash and grind to obtain a barium borate compound. The product is subjected ...

Embodiment 2

[0040] According to the reaction formula 2Ba(NO 3 ) 2 +10H 3 BO 3 →Ba 2 B 10 O 17 +15H 2 O↑+4NO 2 ↑+O 2 ↑Synthetic compound Ba 2 B 10 O 17 , The specific operation steps are carried out according to Example 1;

[0041] Growing large size Ba in high temperature melt by pulling method 2 B 10 O 17 Crystal:

[0042] Compound Ba 2 B 10 O 17 Put it into an open platinum crucible of Φ50mm×40mm, put the crucible into a crystal growth furnace, raise the temperature to 890℃, keep the temperature for 72 hours, and then lower the temperature to 869℃ to obtain Ba 2 B 10 O 17 Melt

[0043] Slowly lower the temperature to room temperature at a temperature of 5°C / h, crystallize to obtain seed crystals;

[0044] Growing crystals on the surface of the compound melt: fix the seed crystal on the seed crystal rod, lower the seed crystal from the top, and introduce the seed crystal fixed on the lower end of the seed crystal rod into the crucible from the small hole on the top of the furnace to make the seed...

Embodiment 3

[0047] According to the reaction formula 2Ba(OH) 2 +10H 3 BO 3 →Ba 2 B 10 O 17 +17H 2 O↑ synthetic compound Ba 2 B 10 O 17 , The specific operation steps are carried out according to Example 1;

[0048] Growing large size Ba in high temperature melt by pulling method 2 B 10 O 17 Crystal:

[0049] Compound Ba 2 B 10 O 17 Put the crucible into the open platinum crucible of Φ60mm×50mm, put the crucible into the crystal growth furnace, raise the temperature to 950℃, hold the temperature for 36 hours, and then lower the temperature to 868℃ to obtain Ba 2 B 10 O 17 Melt

[0050] Slowly lower the temperature to room temperature at a temperature of 3°C / h, crystallize to obtain seed crystals;

[0051] Growing crystals in compound melt: fix the seed crystal on the seed rod, lower the seed crystal from the top, and introduce the seed crystal fixed on the bottom of the seed rod into the crucible from the small hole on the top of the furnace, so that the seed crystal enters the Ba 2 B 10 O 17 In th...

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PUM

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Abstract

The invention relates to a barium borate compound, a barium borate compound optical crystal, and a preparing method and uses of the barium borate compound optical crystal. The chemical formula of the compound is Ba2B10O17, and the space group of the compound is P1, wherein a=6.7128(3) angstroms, b=9.8698(4) angstroms and c=9.9998(4) angstroms. The molecular weight of the compound is 654.7538. The compound is synthesized by a solid phase reaction method. The chemical formula of the barium borate compound optical crystal is Ba2B10O17, the crystal belongs to a triclinic system, and the space group is P1, wherein a=6.7128(3) angstroms, b=9.8698(4) angstroms, c=9.9998(4) angstroms, and V=617.07(4) angstroms. The optical transparency range of the crystal is 190-2600 nm. The crystal is high in refractive index, proper in mechanical hardness, easy to cut, polish, process and store, insoluble in water, non-deliquescent, stable in air, and suitable for manufacturing optical communication elements such as optical isolators, circulators, beam displacers, optical polarizers and optical modulators. The crystal is particularly suitable for manufacturing polarizing prisms of various uses, phase delay devices and electro-optic modulators. The devices utilize refractive index characteristics of the crystal, particularly large birefringence.

Description

Technical field [0001] The present invention relates to the chemical formula Ba 2 B 10 O 17 The compound barium borate and barium borate optical crystal, crystal preparation method and optical device made by using the crystal. Background technique [0002] Birefringence is one of the important characteristics of light when it propagates in optically non-uniform dielectric crystals. When light propagates in an optical heterogeneous body (such as crystals of trigonal, tetragonal, and hexagonal crystal systems) (except along the optical axis), it will change its vibration characteristics and decompose into two electric field vectors The vibration directions are perpendicular to each other, the propagation speed is different, and the refractive index of two polarized light beams, namely o light and e light, is called birefringence, and such crystals are called birefringent crystals. Using the characteristics of birefringent crystals, linearly polarized light can be obtained, and bea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/22C30B15/00C01B35/12
Inventor 潘世烈刘莉莉杨云
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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