Magneto-optical crystal as well as preparation method and application thereof

A magneto-optic crystal and crystal technology, applied in the field of magneto-optic crystal and its preparation, can solve the problems of unusable, high raw material price and high cost of TGG crystal, and achieve good application prospects, good transmittance and high optical quality Effect

Inactive Publication Date: 2020-09-29
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the other hand, YIG is a non-isotropic melting compound with a transition melting point of 1555°C. It cannot be grown by the traditional pulling method, and it is difficult to obtain high-quality crystals.
Although TGG has a wide transmission range (400-1100nm, excluding 470-500nm), but in the process of TGG crystal growth due to Ga 2 o 3 The volatilization of TGG crystals causes the melting point and composition of TGG crystals to deviate, and it is not easy to obtain high-quality TGG crystals
In addition, the raw material price of TGG crystal is high, which also leads to its high cost

Method used

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  • Magneto-optical crystal as well as preparation method and application thereof
  • Magneto-optical crystal as well as preparation method and application thereof
  • Magneto-optical crystal as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0044] This embodiment provides a method for preparing a magneto-optic crystal, the preparation method comprising the following steps:

[0045] (1) Press Li 3 ln 3 m 2 o 12 The stoichiometric ratio of the crystal was weighed to take the raw material Li 2 CO 3 ,Tb 4 o 7 ,TeO 2 , mix the raw materials evenly, put them into a crucible for sintering, and the sintering temperature is 700°C to obtain Li 3 ln 3 m 2 o 12 Raw material of magneto-optic crystal;

[0046] (2) Li will be obtained 3 ln 3 m 2 o 12 Magneto-optic crystal polycrystalline material and flux (LiF, TeO 2 and B 2 o 3 ), according to the molar ratio of 1:10:4:2 fully mixed evenly;

[0047] (3) Put the above-mentioned raw materials into a platinum crucible, heat to melt, and stir for 18 hours; find the seed crystal under the saturation point of the melt; rotate the seed crystal rod at a rotation rate of 10 rpm, and grow crystals at a rate of 1° C. / day at the same time; When the crystal grows to an ...

Embodiment 2

[0049] This embodiment provides a method for preparing a magneto-optic crystal, the preparation method comprising the following steps:

[0050] (1) Press Li 3 ln 3 m 2 o 12 The stoichiometric ratio of the crystal was weighed to take the raw material Li 2 CO 3 ,Tb 4 o 7 ,TeO 2 , mix the raw materials evenly, put them into a crucible for sintering, and the sintering temperature is 1200°C to obtain Li 3 ln 3 m 2 o 12 Raw material of magneto-optic crystal;

[0051] (2) Li will be obtained 3 ln 3 m 2 o 12 Magneto-optic crystal polycrystalline material and flux (LiF, TeO 2 and B 2 o 3 ), according to the molar ratio of 1:20:8:8 fully mixed evenly;

[0052] (3) Put the above-mentioned raw materials into a platinum crucible, heat to melt, and stir for 24 hours; find the seed crystal under the saturation point of the melt; rotate the seed crystal rod at a rotation rate of 30 rpm, and grow crystals at a rate of 5° C. / day at the same time; When the crystal grows to an...

Embodiment 3

[0054] This embodiment provides a method for preparing a magneto-optic crystal, the preparation method comprising the following steps:

[0055] (1) Press Li 3 ln 3 m 2 o 12 The stoichiometric ratio of the crystal was weighed to take the raw material Li 2 CO 3 ,Tb 4 o 7 ,TeO 2 , mix the raw materials evenly, put them into a crucible for sintering, and the sintering temperature is 1000°C to obtain Li 3 ln 3 m 2 o 12 Raw material of magneto-optic crystal;

[0056] (2) Li will be obtained 3+x ln 3 m 2 o 12 Magneto-optic crystal polycrystalline material and flux (LiF, TeO 2 and B 2 o 3 ), according to the molar ratio of 1:15:6:5, fully mixed evenly;

[0057] (3) Put the above-mentioned raw materials into a platinum crucible, heat to melt, and stir for 24 hours; find the seed crystal under the saturation point of the melt; rotate the seed crystal rod at a rotation rate of 20 rpm, and grow crystals at a rate of 3° C. / day at the same time; When the crystal grows to...

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Abstract

The invention provides a magneto-optical crystal as well as a preparation method and application thereof. The chemical formula of the magneto-optical crystal is Li3Ln3M2O12, Ln is one or more of Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Al and Ga, and M is any one or more of Te, W and Mo. The magneto-optical crystal can be obtained by growing at a low temperature by adopting afluxing agent method.

Description

technical field [0001] The invention belongs to the field of inorganic materials, and relates to a magneto-optical crystal, a preparation method and application thereof. Background technique [0002] Magneto-optic crystals are important functional crystals with magneto-optical effects in the ultraviolet to infrared band. In recent years, with the development of laser, computer and optical fiber communication technologies, magneto-optical materials have shown their unique properties and broad application prospects. The Faraday effect can be used to make magneto-optical isolators, magneto-optical deflectors, magneto-optical switches, magneto-optic modulators, magneto-optical circulators, magneto-optic retarders, magneto-optical information processing systems, and optical fiber current sensors for strong magnetic fields and high-voltage transmission lines Wait. Therefore, magneto-optical materials have become the focus and object of research by scientists from all over the wo...

Claims

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Application Information

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IPC IPC(8): C30B29/22C30B15/00C30B28/10
CPCC30B15/00C30B28/10C30B29/22
Inventor 林哲帅尤丰光涂衡胡章贵
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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