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Method for rapidly growing yttrium iron garnet crystal

A technology of yttrium-iron garnet and crystals, which is applied in the field of rapid growth of yttrium-iron garnet crystals, can solve the problems of long crystal growth period, and achieve the effects of increasing crystal yield, increasing growth efficiency, and rapid growth

Pending Publication Date: 2022-04-12
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to provide a kind of method of rapid growth yttrium iron garnet crystal, to solve the problem of long crystal growth cycle in the prior art

Method used

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  • Method for rapidly growing yttrium iron garnet crystal
  • Method for rapidly growing yttrium iron garnet crystal
  • Method for rapidly growing yttrium iron garnet crystal

Examples

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Embodiment 1

[0023] A method for rapidly growing yttrium iron garnet crystals, comprising the following steps:

[0024] (1) According to Y 3 Fe 5 o 12 Molecular formula stoichiometric ratio Weigh Y separately 2 o 3 and Fe 2 o 3 Grind until uniform, and sinter at 1200°C for 12 hours to obtain a polycrystalline material;

[0025] (2) Polycrystalline material and PbO-Bi 2 o 3 The mixed flux is formulated according to the design, and ground and mixed evenly, and loaded into a platinum crucible; the amount of flux added is 75% of the total mass of the mixed material; the thickness of the platinum crucible is 0.15mm, the shape is columnar, and the bottom is pointed bottom with a lid closure;

[0026] (3) Place the crucible of step (2) in a pre-designed thermal insulation ceramic tube with a ventilation system, place it in a vertical solidification furnace with three temperature zones, and adjust the position so that it is at the required height;

[0027] (4) The furnace temperature is ...

Embodiment 2

[0040] A preparation method of bismuth-doped yttrium iron garnet crystal, comprising the following steps:

[0041] (1) According to Y 3-x Bi x Fe 5 o 12, x=0.2 Molecular formula stoichiometric ratio Weigh Y respectively 2 o 3 , Fe 2 o 3 and Bi 2 o 3 Grind until uniform, and sinter at 1100°C for 12 hours to obtain a polycrystalline material;

[0042] (2) Polycrystalline material and Bi 2 o 3 The fluxing agent is formulated according to the design, and ground and mixed evenly, and loaded into a platinum crucible; the amount of the fluxing agent added is 82% of the total mass of the mixed material; the thickness of the platinum crucible is 0.15mm, the shape is columnar, and the bottom is flat , with a lid seal on it;

[0043] (3) Place the crucible of step (2) in a pre-designed thermal insulation ceramic tube with a ventilation system, place it in a vertical solidification furnace with three temperature zones, and adjust the position so that it is at the required heig...

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Abstract

The invention belongs to the technical field of crystal growth, and discloses a method for rapidly growing yttrium iron garnet crystals. The preparation method is characterized by comprising the following steps: (1) respectively weighing Y2O3 and Fe2O3 according to the stoichiometric ratio of a molecular formula of Y3Fe5O12, grinding to be uniform, and sintering to obtain a polycrystal material; (2) burdening the polycrystal material and a fluxing agent (such as PbO and Bi2O3) according to the design composition, grinding and uniformly mixing, and filling into a platinum metal crucible; (3) placing the crucible in a pre-designed heat-insulating ceramic tube with a ventilation system, placing the heat-insulating ceramic tube in a three-temperature-zone vertical solidification furnace, and adjusting the position of the heat-insulating ceramic tube to enable the heat-insulating ceramic tube to be at a required height; and (4) heating, preserving heat, melting the materials, rapidly introducing gas into the bottom of the crucible after the raw materials are completely melted and the temperature is balanced, inducing rapid nucleation and crystallization, and simultaneously cooling to realize crystal growth. The method is simple in process equipment and convenient to operate, multiple parameters can be adjusted, and growth of crystals with different components is met.

Description

technical field [0001] The invention belongs to the technical field of crystal growth, and specifically discloses a method for rapidly growing yttrium-iron garnet crystals. Background technique [0002] The magneto-optical effect refers to various optical phenomena produced by the interaction between light and magneto-optical substances, including the Faraday effect, the Kerr effect, the Cotton-Mouton effect, the Zeeman effect and the magneto-optic effect. effect and the Kerr effect. As an important class of magneto-optical materials, magneto-optic crystals have the advantages of high Verdet constant, good optical quality, good thermal conductivity and high damage threshold, and are widely used in modulators, isolators, circulators, magneto-optical switches, magneto-optical sensors, etc. an optical device. Among them, yttrium iron garnet crystal is the most widely used magneto-optic crystal in the infrared band, and plays an important role in the fields of 5G communication...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/28C30B9/12
Inventor 徐家跃申慧马健方娅婷马雨蝶周鼎
Owner SHANGHAI INST OF TECH
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