Unlock instant, AI-driven research and patent intelligence for your innovation.

Compound lead barium bromoborate and lead barium bromoborate optical crystal, preparation method and use

An optical crystal, bromoboric acid technology, applied in chemical instruments and methods, boron compounds, boron oxide compounds, etc., can solve the problems of low transmittance, low birefringence, and unsuitability for Glan prisms.

Active Publication Date: 2018-03-09
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ca 3 (BO 3 ) 2 The light transmission range of the crystal is 180-3800 nm, but it does not transmit high in the deep ultraviolet region, and the birefringence in the visible region is small; MgF 2 The light transmission range of the crystal is 110-8500 nm. It is a good material for deep ultraviolet, but its birefringence is too small to be used as a Glan prism.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Compound lead barium bromoborate and lead barium bromoborate optical crystal, preparation method and use
  • Compound lead barium bromoborate and lead barium bromoborate optical crystal, preparation method and use
  • Compound lead barium bromoborate and lead barium bromoborate optical crystal, preparation method and use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] According to the chemical equation: 6PbO+2BaCO 3 +5H 3 BO 3 +NH 4 Br→Pb 6 Ba 2 (BO 3 ) 5 Br+8H 2 O↑+2CO 2 ↑+NH 3 ↑Synthesis of lead barium bromoborate:

[0034] a. PbO, BaCO 3 、H 3 BO 3 and NH 4 Put Br into a mortar at a molar ratio of 6:2:5:1, mix and grind thoroughly, then put it into a corundum crucible, press it tightly, put it into a muffle furnace, slowly raise the temperature to 300°C, and keep the temperature constant for 15 hours , take out the crucible after cooling to room temperature, take out the sample and grind it evenly, then place it in the crucible, raise the temperature to 400°C, keep the temperature constant for 15 hours, take it out after cooling down to room temperature, grind it evenly again and put it in the crucible, put the muffle The temperature of the furnace was raised to 530°C, and after 72 hours of constant temperature, the sample was taken out and ground to obtain a single-phase polycrystalline powder of lead barium bromobor...

Embodiment 2

[0041] Embodiment 2, by reaction formula PbBr 2 +11PbO+4BaCO 3 +10H 3 BO 3 →2Pb 6 Ba 2 (BO 3 ) 5 Br+15H 2 O↑+4CO 2 ↑Synthetic compound Pb 6 Ba 2 (BO 3 ) 5 Br, the specific operation steps are the same as in Example 1 step a;

[0042] b. Put the compound lead barium bromoborate single-phase polycrystalline powder into a Φ50mm×50mm platinum crucible, heat to a temperature of 700°C, and keep the temperature for 5h to obtain lead barium bromoborate Pb 6 Ba 2 (BO 3 ) 5 Br melt;

[0043] c. Slowly cool the lead barium bromoborate melt obtained in step b to room temperature at a rate of 2°C / h to obtain seed crystals;

[0044] d. Cool the melt in step b to 592°C, fix the seed crystal obtained in step c on the seed rod, put it into contact with the surface of the melt from the top of the crystal growth furnace, and keep it warm for 20 minutes;

[0045] e. Cool the melt in step d to 589°C, rotate the seed rod at a speed of 10r / min, and grow crystals under the condition...

Embodiment 3

[0048] According to the reaction formula 12PbO+4BaCO 3 +5B 2 o 3 +2NH 4 Br→2Pb 6 Ba 2 (BO 3 ) 5 Br+H 2 O↑+4CO 2 ↑+2NH 3 ↑Synthetic compound Pb 6 Ba 2 (BO 3 ) 5 Br, the specific operation steps are the same as in Example 1 step a;

[0049] b. Put the compound lead barium bromoborate single-phase polycrystalline powder into a Φ30mm×30mm platinum crucible, heat to a temperature of 740°C, and keep the temperature for 10h to obtain a lead barium bromoborate melt;

[0050] c. Lower the lead barium bromoborate melt obtained in step b to room temperature at a rate of 0.5°C / h, and crystallize to obtain seed crystals;

[0051] d. Lower the temperature of the melt in step b to 600°C, fix the seed crystal obtained in step c on the seed rod, extend it into the melt from the top of the crystal growth furnace, and keep it warm for 30 minutes;

[0052] e. Cool the melt in step d to 593°C, rotate the seed rod at a speed of 30r / min, and then grow crystals under the condition of s...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
translucencyaaaaaaaaaa
Login to View More

Abstract

The invention relates to a lead-barium bromoborate compound, a lead-barium bromoborate crystal, a preparation method and applications thereof. The chemical formula of lead-barium bromoborate compound is Pb6Ba2(BO3)5Br, the molecular weight is 1891.78, and the compound is synthesized through a solid phase reaction method. The chemical formula of lead-barium bromoborate crystal is Pb6Ba2(BO3)5Br, the molecular weight is 1891.78, the crystal belongs to the monoclinic system, the space group is C2 / m, the cell parameters are: a=9.306(5) angstrom, b=5.388(3) angstrom, c=17.994(9) angstrom, beta=101.513 (6) degree, V=886.42(13) angstrom<3>; and the transmittance range of the lead-barium bromoborate crystal is 290 to 3000 nm. The lead-barium bromoborate crystal has the advantages that the double refractive index is proper, and the crystal can be easily cut and polished, is stable in the air, is resistant to air-slaking, is water-insoluble, and can be used as a double refraction crystal, which is used in fields such as fiber optic isolators in optical communication, circulator, displacement of light beam, Glan prism, polarization optics, and the like.

Description

technical field [0001] The present invention relates to a kind of compound lead barium bromoborate and lead barium bromoborate optical crystal and its preparation method and application. The chemical formula of the compound is Pb 6 Ba 2 (BO 3 ) 5 Br. Background technique [0002] When a beam of light waves is projected onto the crystal interface, two refracted beams are generally produced; one of them obeys the law of refraction called o-ray (ordinary ray, ordinary ray), and its refractive index is expressed by n o Indicates that another beam that does not follow the law of refraction is called e-ray (extraordinary ray, extraordinary light), and its refractive index is expressed by n e Indicates that both beams of light are polarized light. This phenomenon is called birefringence. Crystal birefringence is an important optical performance parameter of electro-optical functional materials. Birefringent crystal materials are widely used, mainly used in: (1) fiber optic is...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/22C30B15/00C30B28/02C01B35/18C01B35/12
Inventor 潘世烈刘璐张方方
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI