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A barium borate compound, a barium borate optical crystal, and a preparing method and uses of the barium borate optical crystal

A technology of optical crystals and compounds, applied in chemical instruments and methods, boron oxide compounds, borates, etc., can solve the problems of high hardness, easy dissociation, and difficulty in artificial synthesis of rutile, and achieve moderate mechanical hardness and easy cutting Effect

Active Publication Date: 2015-06-10
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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  • A barium borate compound, a barium borate optical crystal, and a preparing method and uses of the barium borate optical crystal
  • A barium borate compound, a barium borate optical crystal, and a preparing method and uses of the barium borate optical crystal
  • A barium borate compound, a barium borate optical crystal, and a preparing method and uses of the barium borate optical crystal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Synthetic barium borate (Ba 2 B 10 o 17 ) compound:

[0031] Adopt solid phase reaction method to synthesize compound barium borate, its chemical equation is:

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

[0033] BaCO 3 and H 3 BO 3Put it into a mortar with a molar ratio of 1:5, mix and grind it carefully, then put it into a corundum crucible with an opening of Φ400mm×400mm, press it tightly, put it into a muffle furnace, and slowly raise the temperature to 300°C, constant temperature 24 Hours, take out the crucible after cooling, at this time the sample is relatively hard, take out the sample and grind it evenly, then put it in the crucible, keep the temperature in the muffle furnace at 600°C for 48 hours, take it out, at this time the sample is more Take out the sample and re-grind it evenly, put it in a crucible, keep the temperature in the muffle furnace at 810°C, keep the temperature for 72 hours, take out the sample, put it in a m...

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 embodiment 1;

[0041] Growth of large-sized Ba by pulling method in high-temperature melt 2 B 10 o 17 Crystal:

[0042] The synthesized compound Ba 2 B 10 o 17 Put it into a Φ50mm×40mm open platinum crucible, put the crucible into a crystal growth furnace, raise the temperature to 890°C, keep the temperature for 72 hours, and then cool it down to 869°C to obtain Ba 2 B 10 o 17 melt;

[0043] Slowly cool down to room temperature at a rate of 5°C / h, and crystallize to obtain seed crystals;

[0044] Crystal growth on the surface of the compound melt: the seed crystal is fixed on the seed crystal rod, the seed crystal is lowered from the top, and the seed crystal fixed on the lower end of the seed crystal rod is introduced into the crucible from the small hole on...

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 embodiment 1;

[0048] Growth of large-sized Ba by pulling method in high-temperature melt 2 B 10 o 17 Crystal:

[0049] The synthesized compound Ba 2 B 10 o 17 Put it into a Φ60mm×50mm open platinum crucible, put the crucible into a crystal growth furnace, raise the temperature to 950°C, keep the temperature for 36 hours, then cool down to 868°C to obtain Ba 2 B 10 o 17 melt;

[0050] Slowly cool down to room temperature at a rate of 3°C / h, and crystallize to obtain seed crystals;

[0051] Crystal growth in 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, so that the seed crystal enters t...

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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 chemical formula Ba 2 B 10 o 17 The compound barium borate and the barium borate optical crystal, the preparation method of the crystal and the optical device made by using the crystal. Background technique [0002] Birefringence is one of the important properties of light propagating in optically inhomogeneous dielectric crystals. When light propagates in an optical heterogeneous body (such as trigonal crystal system, tetragonal crystal system, hexagonal crystal system and other crystal systems) (except along the optical axis), its vibration characteristics will be changed and decomposed into two electric field vectors The vibration directions are perpendicular to each other, the propagation speed is different, and the two beams of polarized light with different refractive indices, namely o light and e light, this phenomenon is called birefringence, and such crystals are called birefringent crystals. By using the c...

Claims

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Application Information

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Patent Type & Authority Applications(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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