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High-aluminum terbium aluminum gallium garnet magneto-optical crystal and preparation method and application thereof

A gallium garnet, terbium aluminum technology, applied in crystal growth, chemical instruments and methods, optics, etc., can solve the problems of low aluminum content, difficult crystal growth, unsatisfactory crystal quality, etc., to reduce melt component segregation, The preparation method is scientific and reasonable, and the price is low.

Pending Publication Date: 2022-08-09
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, domestic Fuzhou University has further increased the aluminum content in the TAGG single crystal, but when the replacement ratio is only 34.2%, there are many defects inside the crystal, and the crystal quality is not ideal (W. Zhang, F. Guo, J. Chen, Journal of Crystal Growth, 306, 2007, 195-199)
All in all, TAGG crystals have excellent magneto-optical properties, but the aluminum content in TAGG crystals reported so far is low (<35%). When the aluminum content in the components is further increased, the crystal growth is very difficult, and there is no high-aluminum TAGG single Crystalline (aluminum content greater than 35%) reported

Method used

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  • High-aluminum terbium aluminum gallium garnet magneto-optical crystal and preparation method and application thereof
  • High-aluminum terbium aluminum gallium garnet magneto-optical crystal and preparation method and application thereof
  • High-aluminum terbium aluminum gallium garnet magneto-optical crystal and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Example 1: TAGG (x=1.75) crystal Tb 3 Al 1.75 Ga 3.25 O 12 grow

[0053] (1) Synthesis of polycrystalline materials by solid-phase sintering

[0054] Raw material Tb 4 O 7 , Al 2 O 3 , Ga 2 O 3 The purity is 99.99%. According to the stoichiometric ratio of Tb 3 Al 1.75 Ga 3.25 O 12 Weigh the raw material, considering Ga 2 O 3 The volatilization and decomposition of 2 O 3 If the excess amount is 2wt.%, put the raw materials into the mixing bucket and mix them thoroughly. The mixing time is 48h. Put the evenly mixed material into a mold and press it into a cylindrical shape, put it into a corundum crucible, and sinter it in a sintering furnace at 1350 ℃ for 36h. The polycrystalline material of TAGG (x=1.75) can be obtained

[0055] (2) crystal growth by pulling method

[0056] Put the sintered polycrystalline material into the iridium crucible (the crucible has been placed in the prepared temperature field), align the center, install the temperature fi...

Embodiment 2

[0057] Example 2: TAGG (x=2) crystal Tb 3 Al 2 Ga 3 O 12 grow

[0058] As described in Example 1, the difference is:

[0059] (1) Synthesis of polycrystalline materials by solid-phase sintering

[0060] According to the stoichiometric ratio of Tb 3 Al 2 Ga 3 O 12 Weigh the raw materials to obtain TAGG (x=2) polycrystalline material.

[0061] (2) crystal growth by pulling method

[0062] During the growth process, the rotation speed was 15 rpm, and the cooling rate was 40 °C / h.

Embodiment 3

[0063] Example 3: TAGG (x=3) crystal Tb 3 Al 3 Ga 2 O 12 grow

[0064] As described in Example 1, the difference is:

[0065] (1) Synthesis of polycrystalline materials by solid-phase sintering

[0066] According to the stoichiometric ratio of Tb 3 Al 3 Ga 2 O 12 Weigh the raw materials to obtain TAGG (x=3) polycrystalline material.

[0067] (2) crystal growth by pulling method

[0068] During the growth process, the pulling speed was 1 mm / h, the rotational speed was 30 rpm, and the cooling rate was 40 °C / h.

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Abstract

The invention relates to a high-aluminum terbium aluminum gallium garnet magneto-optical crystal and a preparation method and application thereof. The general formula of the crystal molecule is Tb3AlxGa5-xO12, wherein xlt is greater than or equal to 1.75; 5, the crystal is abbreviated as TAGG, and the crystal belongs to a garnet structure. The high-aluminum TAGG magneto-optical crystal disclosed by the invention grows by using a melt method, a'secondary seeding 'technology is adopted, a large-size and high-quality single crystal is obtained through growth, and the high-aluminum TAGG magneto-optical crystal is superior to a TGG crystal in magneto-optical, thermal and optical properties and the like, and can be used for manufacturing an efficient magneto-optical device.

Description

technical field [0001] The invention relates to a preparation method and application of a novel magneto-optical crystal, in particular to a high-aluminum terbium aluminum gallium garnet crystal, a preparation method and application, and belongs to the technical field of crystals and devices. Background technique [0002] Non-reciprocal magneto-optical devices based on Faraday's magneto-optical effect have a very wide range of applications in optical fiber communication, information processing, lasers, medicine and other fields. The core of which is magneto-optical crystals, so magneto-optical crystals have become the most commercialized. one of the crystals. In recent years, with the rapid development of optical communication technology (such as terahertz communication) and high-power lasers, the application scope of magneto-optical crystals has been further expanded, and the requirements for crystal quality and performance have been further improved. [0003] In the 400-11...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/28C30B27/02G02F1/09
CPCC30B29/28C30B27/02G02F1/093
Inventor 付秀伟辛显辉贾志泰陶绪堂
Owner SHANDONG UNIV
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