Preparation method of rare earth substituted yttrium iron garnet crystal

A technology for yttrium iron garnet and crystal is applied in the field of preparation of rare earth substituted yttrium iron garnet crystal, and achieves the effects of promoting growth and growth, reducing growth difficulty and energy consumption cost, and promoting the development of industrialization.

Inactive Publication Date: 2020-03-24
SHANGHAI APPLIED TECHNOLOGIES COLLEGE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of this, the purpose of the present invention is to address the deficiencies of the prior art, to provide a rare earth-substituted yttrium iron garnet crystal preparation method, which solves the bottleneck of the existing rare earth doped yttrium iron garnet crystal preparation method

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  • Preparation method of rare earth substituted yttrium iron garnet crystal

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Embodiment 1

[0029] A preparation method for ytterbium-substituted yttrium-iron garnet crystals, comprising the following steps:

[0030] (1) According to the crystal molecular formula Y （3-x） Yb x Fe 5 o 12 , where x=0.45, weigh Y with a purity ≥99.99% according to the molar ratio 2 o 3 , Yb 2 o 3 and Fe 2 o 3 raw materials, and mixed and stirred various weighed raw materials for 30-50 minutes to obtain mixed powder raw materials; after the mixed powder raw materials were pressed into blocks, they were placed in a solid state reaction at a temperature of 1100 ° C for 12 hours to obtain polycrystalline blocks ;

[0031] (2) Crushing and grinding the polycrystalline material block obtained in step (1), adding a flux and placing it in an agate mortar for full grinding until uniform to obtain a mixed material; the flux is Bi 2 o 3 +B 2 o 3 Main composite flux, its raw material purity is 99.999%, which accounts for 58% of the total mass of the mixed material;

[0032] (3) Select ...

Embodiment 2

[0038] A preparation method of yttrium iron garnet crystal, comprising the following steps:

[0039] (1) According to the crystal molecular formula Y 3 Fe 5 o 12 , weigh Y with a purity ≥99.99% according to the molar ratio 2 o 3 and Fe 2 o 3 raw materials, and put the weighed various raw materials in an agate mortar and grind them fully until they are uniform to obtain the mixed powder raw materials; after the mixed powder raw materials are pressed into blocks, they are placed at a temperature of 1150°C for solid phase reaction for 20 hours, Obtain a polycrystalline block;

[0040] (2) Crushing and grinding the polycrystalline block obtained in step (1), and adding a flux to grind for 40-60 minutes to obtain a mixed material; the flux is Bi 2 o 3 +B 2 o 3 Main composite flux, its raw material purity is 99.999%, which accounts for 64% of the total mass of the mixed material;

[0041] (3) Put the mixed material obtained in step (2) into the crucible and seal it; put t...

Embodiment 3

[0047] A method for preparing terbium-substituted yttrium-iron garnet crystals, comprising the following steps:

[0048] (1) According to the crystal molecular formula Y （3-x） Tb x Fe 5 o 12 , where x=1.25, weigh Y with a purity ≥99.99% according to the molar ratio 2 o 3 , Tb 2 o 3 and Fe 2 o 3 Raw materials, put the weighed raw materials in an agate mortar and grind them until they are uniform for 30-50 minutes to obtain the mixed powder raw materials; after the mixed powder raw materials are pressed into blocks, they are placed in a solid phase at a temperature of 1300°C Reaction 10h, obtain polycrystalline block;

[0049] (2) Crushing and grinding the polycrystalline material block obtained in step (1), adding a flux and placing it in an agate mortar for full grinding until uniform to obtain a mixed material; the flux is Bi 2 o 3 +B 2 o 3 Main composite flux, its raw material purity is 99.999%, which accounts for 50% of the total mass of the mixed material;

...

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Abstract

The invention discloses a preparation method of a rare earth substituted yttrium iron garnet crystal. The method includes the steps of: respectively weighing Y2O3, Re2O3 and Fe2O3 in molar ratio according to Y(3-x)RexFe5O12, conducting grinding and briquetting, and then carrying out solid-phase reaction to obtain a polycrystalline material block; crushing and grinding the polycrystalline materialblock, and adding a fluxing agent to obtain a mixed material; putting the mixed material into a crucible, putting the crucible into a crystal growth furnace, performing heating to a set temperature, and conducting heat preservation to obtain a high-temperature solution; then changing the relative positions of the crucible and a heating coil to enable the crucible to gradually move to a low-temperature area until the high-temperature solution is completely crystallized, stopping moving, and performing cooling to room temperature to obtain a crystal ingot; and removing the fluxing agent by adopting mechanical stripping or solution corrosion method to obtain the crystal. By means of the fluxing agent, the method provided by the invention effectively lowers the crystal growth temperature and reduces energy consumption, provides a driving force for crystal growth through vertical movement, promotes the growth of crystals, and can acquire the large-size blocky crystal.

Description

technical field [0001] The invention relates to the technical field of crystal growth, in particular to a method for preparing rare earth-substituted yttrium iron garnet crystals. Background technique [0002] The improvement of the performance of the optical fiber transmission system has promoted the arrival of the era of 5G high-speed information. As one of the key materials for optical fiber communication, magneto-optical materials have unique magneto-optic effects and optical non-reciprocity from the visible to the near-infrared band, and have the characteristics of high transmission, low absorption, and large Verdet constant in the near-infrared band. , so it has an excellent core position in magnetic theory and technology research, and is welcomed by the field of magneto-optical devices such as optical isolators and optical fiber communications, and is widely used in various devices in the field of magneto-optic. [0003] Among them, yttrium iron garnet (Y 3 Fe 5 o ...

Claims

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Application Information

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IPC IPC(8): C30B29/28C30B1/10C30B9/12C30B33/02
CPCC30B1/10C30B9/12C30B29/28C30B33/02
Inventor 徐家跃蒋颖穗申慧田甜
Owner SHANGHAI APPLIED TECHNOLOGIES COLLEGE
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