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Si/Ti doped terbium aluminum garnet Faraday magneto-optical rotation transparent ceramic and preparation method thereof

A technology of transparent ceramics and magneto-optical rotation, which is applied in the field of Faraday magneto-optical transparent ceramics to achieve the effects of low cost, high magneto-optical characteristics, and high optical quality

Active Publication Date: 2015-05-13
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to overcome the inadequacies or difficulties that large-size single crystal TAG materials cannot be obtained in the above-mentioned prior art, and provide a Faraday magnetic optically transparent ceramic and its preparation method, which uses a solid-state reaction method to prepare TAG polycrystalline below the melting point of TAG At the same time, the use of Ti / Si doping greatly improves the optical quality of TAG-based Faraday magnetic optically transparent ceramics under the premise of maintaining TAG's high Verdet constant, which is expected to promote the practical application of TAG-based transparent materials

Method used

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  • Si/Ti doped terbium aluminum garnet Faraday magneto-optical rotation transparent ceramic and preparation method thereof
  • Si/Ti doped terbium aluminum garnet Faraday magneto-optical rotation transparent ceramic and preparation method thereof

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Embodiment 1

[0026] Example 1 Tb 3 al 0.96 Ti 0.04 o 12 Preparation of Transparent Faraday Magnetic Optical Ceramics

[0027] Tb 3 al 0.96 Ti 0.04 o 12 The preparation method of transparent Faraday magnetic optical ceramics, the specific steps are as follows:

[0028] ①Terbium heptoxide (Tb 4 o 7 ), alumina (Al 2 o 3 ) and titanium oxide (TiO 2 );

[0029] ②Molecular formula Tb of transparent Faraday magneto-optic ceramics prepared as required 3 al 5-x Si y Ti z o 12 Composition and determine the value of x=0.04, y=0, z=0.04, the purity is not less than 99.9% tetrabium heptoxide (Tb 4 o 7 ), alumina (Al 2 o 3 ) and titanium oxide (TiO 2 ) powder as the raw material, according to the molar ratio of each metal ion in the composition, a total of 30g of powder raw material is prepared accordingly, and 0.3wt% to 0.7wt% ethyl orthosilicate is added as an additive, and the powder is mixed and finely ground by ball milling change;

[0030] ③ After the powder is dried, it is...

Embodiment 2

[0036] Tetrabium heptoxide (Tb 4 o 7 ), alumina (Al 2 o 3 ) and titanium oxide (TiO 2 ) press Tb 3 al 0.97 Ti 0.03 o 12 The molar ratio of each metal ion in the composition is correspondingly prepared powder raw material, and other conditions are the same as embodiment 1, can obtain Tb 3 al 0.97 Ti 0.03 o 12 Transparent ceramic.

Embodiment 3

[0038] Tetrabium heptoxide (Tb 4 o 7 ), alumina (Al 2 o 3 ) and titanium oxide (TiO 2 ) press Tb 3 al 0.98 Ti 0.02 o 12 The molar ratio of each metal ion in the composition is correspondingly prepared powder raw material, and other conditions are the same as embodiment 1, can obtain Tb 3 al 0.98 Ti 0.02 o 12 Transparent ceramic.

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Abstract

The invention provides a Si / Ti doped terbium aluminum garnet Faraday magneto-optical rotation transparent ceramic. The structural formula of the Si / Ti doped terbium aluminum garnet Faraday magneto-optical rotation transparent ceramic is Tb3Al5-xSiyTizO12, wherein y plus z is equal to x, and the numerical areas of x, y and z are as follows: x is greater than or equal to 0.01 and less than or equal to 0.06, y is greater than or equal to 0 and less than or equal to 0.06, and z is greater than or equal to 0 and less than or equal to 0.06. The preparation method of the Si / Ti doped terbium aluminum garnet Faraday magneto-optical rotation transparent ceramic comprises the following steps: proportioning raw materials according to the structural formula Tb3Al5-xSiyTizO12, adding 0.3wt%-0.7wt% of tetraethyl orthosilicate and performing ball milling, drying, sieving and tableting; and then applying isostatic cool pressure of above 150MPa for pressing into a green body; pre-sintering to remove organic components, and then putting the pre-sintered green body into a sintering furnace for sintering to obtain the Tb3Al5-xSiyTizO12 transparent ceramic. The Si / Ti doped terbium aluminum garnet Faraday magneto-optical rotation transparent ceramic has relatively high optical transmittance within the visible-near infrared waveband and is capable of maintaining the relatively high Verdet constant of the original matrix TAG; the transparent ceramic has the advantages of simple preparation process, low cost, short preparation period and the like.

Description

technical field [0001] The invention relates to Faraday magnetic optically transparent ceramics, in particular to Si / Ti doped terbium aluminum garnet faraday magnetically optically transparent ceramics and a preparation method thereof. Background technique [0002] Magneto-optical materials have very important applications in the fields of optical communication and high-power laser processing. Terbium aluminum garnet (Tb 3 al 5 o 12 , abbreviated as TAG) is currently generally believed to be the most ideal magneto-optical material in the visible-near-infrared band, and the applicable wavelength is: 400-1100nm (excluding 470-500nm). [0003] TAG and the most commonly used terbium gallium garnet (Tb 3 Ga 5 o 12 , abbreviated as TGG) magneto-optical materials have higher Verdet constant, lower preparation cost, higher transmittance in the visible light-near infrared region, non-toxic and other advantages. It is not only a potential magneto-optical material, but also can ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/44C04B35/50C04B35/622
Inventor 周圣明陈冲丰岳林辉易学专张帅唐燕如
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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