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Yttrium phosphate double-refraction crystal and growing method and application thereof

A birefringent crystal and crystal growth technology, applied in crystal growth, single crystal growth, single crystal growth, etc., can solve the problems of small birefringence, narrow transmission range, and difficulty in artificial synthesis, and achieve the effect of not being prone to deliquescence

Inactive Publication Date: 2016-05-11
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, some of these materials mainly exist in natural forms, and are difficult to synthesize artificially. They are generally small in size and cannot meet the requirements of large-scale optical polarizing elements (such as calcite crystals and rutile crystals); some have narrow transmission ranges and use wavelength bands. Cannot reach the deep ultraviolet region (such as LiNbO 3 Crystal, YVO 4 crystal); some can be applied to the deep purple band, but the birefringence is too small (such as α-BaB 2 o 4 Crystal, MgF 2 crystal)

Method used

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  • Yttrium phosphate double-refraction crystal and growing method and application thereof
  • Yttrium phosphate double-refraction crystal and growing method and application thereof
  • Yttrium phosphate double-refraction crystal and growing method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1 (melt pulling method grows yttrium phosphate birefringent crystal)

[0030] According to chemical formula: Y 2 o 3 +P 2 o 5 →2YPO 4 Preparation of Yttrium Phosphate Birefringent Crystals:

[0031] Will weigh raw material (analytical pure) Y 2 o 3 225.81g, P 2 o 5 141.94g (the molar ratio of Y and P is 1:1) was put into a mortar, mixed and ground, and evenly compacted, put into a corundum crucible, and sintered in a muffle furnace at a temperature of 1100°C for 8 hours in an air atmosphere to obtain Yttrium phosphate polycrystalline material;

[0032] Then put the yttrium phosphate polycrystalline material into a Φ100mm×100mm iridium gold crucible, put it into an induction heating pull-type growth furnace, vacuumize, pass the protective gas nitrogen, heat up to 2200°C to melt the polycrystalline material, and keep the temperature for 24 hours;

[0033] Cool the melt to 2150°C, seed crystals under the surface of the melt, rotate the seed crystals at a...

Embodiment 2

[0035] Embodiment 2 (melt top seed method growth yttrium phosphate birefringent crystal)

[0036] According to the chemical formula: Y 2 o 3 +2NH 4 h 2 PO 4 →2YPO 4 +2NH 3 ↑+3H 2 O prepares yttrium phosphate birefringent crystal: raw materials used (analytically pure): Y 2 o 3 225.81g, NH 4 h 2 PO 4 230.06g (the molar ratio of Y and P is 1:1);

[0037] Put the weighed raw materials into a mortar, mix and grind them, and evenly compact them into a platinum crucible, and sinter them in a muffle furnace at a temperature of 900°C in an air atmosphere for 12 hours to obtain polycrystalline yttrium phosphate materials;

[0038] Then put the yttrium phosphate polycrystalline material into a Φ100mm×80mm iridium gold crucible, put it into an induction heating pull-type growth furnace, vacuumize, pass the protective gas argon, heat up to 2200°C to melt the polycrystalline material, and keep the temperature for 24 hours. Cool the melt down to 2150°C, seed crystals under the ...

Embodiment 3

[0040] Embodiment 3 (flux method pulling method grows yttrium phosphate birefringent crystal)

[0041] According to the chemical formula: Y 2 o 3 +2NH 4 h 2 PO 4 →2YPO 4 +2NH 3 ↑+3H 2 O Preparation of Yttrium Phosphate Birefringent Crystals:

[0042] Raw materials used (analytical pure): Y 2 o 3 225.81g, NH 4 h 2 PO 4 230.06g (wherein the molar ratio of Y and P is 1:1), co-solvent is analytically pure sodium pyrophosphate Na 4 P 2 o 7 , 455.86g (mass ratio of raw material to co-solvent is 1:1):

[0043] Put the weighed raw materials into a mortar, mix and grind them, and briquette them evenly, put them into a platinum crucible, and sinter them in a muffle furnace at a temperature of 1000°C in an air atmosphere for 24 hours to obtain polycrystalline yttrium phosphate materials;

[0044] Then the yttrium phosphate polycrystalline material and Na 4 P 2 o 7 After the auxiliary solvent is mixed evenly, put it into a Φ100mm×80mm platinum crucible, put it into an i...

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Abstract

The invention relates to an yttrium phosphate double-refraction crystal and a growing method and application thereof. The crystal has the chemical formula of YPO4, belongs to a tetragonal system, and has the space group of I4[1] / amd, the cell parameter a of 6.8947 angstroms, the cell parameter c of 6.0276 angstroms, the cell parameter V of 286.533 angstroms<3> and the cell parameter Z of 4. The crystal is used for infrared-deep ultraviolet wave bands, is a single-axis crystal, and has the transmission range of 150-3300 nm; the double-refraction difference delta n of n[e] and n[o] ranges from 0.18 to 0.22, and the large-size yttrium phosphate crystal grows through a high-temperature melt method (melt pulling method or melt top seed solution method) or a flux growth method. The yttrium phosphate crystal obtained through the method is large in size, short in growth cycle, wide in light transmission range, high in transmission rate, large in double-refraction coefficient, and easy to cut, polish, machine and store. The crystal is a wide-waveband double-refraction optical material and can be used for manufacturing an optical fiber isolator, an annular mirror, a beam displacer, a beam splitter, a Glan polarizer and other polarizing devices and has important application in the fields of optics and communication.

Description

technical field [0001] The present invention relates to the growth method of optical device, particularly a kind of yttrium phosphate (chemical formula is YPO) that is used in infrared-deep ultraviolet band 4 ) birefringent crystals and their growth methods and applications. Background technique [0002] Birefringence is one of the important properties of light propagating in a non-homogeneous dielectric crystal. When a beam of light is projected onto a crystal interface, two refracted beams are generally produced, a phenomenon known as birefringence. Due to the anisotropy of the crystal material, the angle between the two refracted rays is related to the propagation direction and polarization state of the light wave. One of the two beams of light obeys the law of refraction is called o light (ordinary ray, ordinary light), 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/14C30B15/00
Inventor 潘世烈王颖
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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