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Yttria-stabilized terbia powder, magneto-optic transparent ceramic and preparation method of magneto-optic transparent ceramic

A technology of transparent ceramics and terbium oxide, which is applied to the preparation of 2O3 nano-powder by wet chemical co-precipitation method and the preparation of transparent ceramics by pure hydrogen pressureless sintering process, can solve the problem of no magneto-optical effect, difficult to make large size, affecting optical Transmittance and other issues, to achieve the effect of improved magneto-optical performance, stable valence and phase structure, and good dispersion

Pending Publication Date: 2019-09-20
SHANGHAI INST OF TECH
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Problems solved by technology

However, there are two difficulties in the preparation of terbium oxide: (1) Tb 2 o 3 Easily formed by Tb at moderate and high temperature 3+ Oxidized to Tb 4+ , while Tb 4+ No magneto-optic effect; (2) Tb 2 o 3 There is a multi-level phase transition in the high temperature region that cracks or pulverizes the material
[0003] 2015 Veber using molten Li 6 Tb(BO 3 ) 3 Grow out 5×5×2mm 3 Tb 2 o 3 crystal, which is more than 3.5 times that of the verdet constant TGG single crystal, but it is not easy to make a large size
In 2016, Snetkov et al. prepared Tb:Y with different doping concentrations by self-propagating high-temperature synthesis. 2 o 3 powder, and then prepared Tb:Y by hot pressing sintering 2 o 3 Translucent ceramics, study finds, Tb 3+ The concentration is positively correlated with the Verdet constant, the higher the terbium content, the larger the verdet constant of the TGG single crystal, in which 30% Tb:Y 2 o 3 The Verdet constant of transparent ceramics is similar to that of TGG single crystals with 100% Tb 2 o 3 The verdet constant of ceramics is more than 3 times that of TGG single crystal, but ceramics may be affected by mold carbon pollution and its optical transmittance

Method used

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  • Yttria-stabilized terbia powder, magneto-optic transparent ceramic and preparation method of magneto-optic transparent ceramic
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  • Yttria-stabilized terbia powder, magneto-optic transparent ceramic and preparation method of magneto-optic transparent ceramic

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Embodiment 1

[0045] A preparation method of yttrium stabilized terbium oxide magneto-optical transparent ceramics, the specific steps are:

[0046] Will Tb 2 o 3 , Y 2 o 3 Dissolve in the nitric acid solution that mass concentration is 68% respectively and react to obtain 0.15mol / L Tb(NO 3 ) 3 solution and 0.15mol / L of Y(NO 3 ) 3 solution;

[0047] Press (Tb 0.5 Y 0.5 ) 2 o 3 Chemical composition, measure Tb(NO 3 ) 3 Solution 150ml, concentration is 0.15mol / L Y(NO 3 ) 3 Solution 150ml, pour into a 500ml beaker and mix evenly to obtain a metal ion salt mixed solution;

[0048] Configure NH 4 HCO 3 and NH 4 OH mixed precipitant solution, in which, NH 4 HCO 3 The concentration is 2mol / L, NH 4 OH concentration is 2mol / L.

[0049] The precipitant solution was dropped into the metal ion salt mixed solution at a rate of 4ml / min and stirred thoroughly. Stop dripping until the pH value of the obtained solution is 7.2, continue to stir for 3 minutes and then stop stirring. Aft...

Embodiment 2

[0057] A preparation method of yttrium stabilized terbium oxide magneto-optical transparent ceramics, the specific steps are:

[0058] Will Tb 2 o 3 , Y 2 o 3 Dissolve in the nitric acid solution that mass concentration is 68% respectively and react to obtain 0.15mol / L Tb(NO 3 ) 3 solution and 0.15mol / L of Y(NO 3 ) 3 solution;

[0059] Press (Tb0.3 Y 0.7 ) 2 o 3 Chemical composition, measure Tb(NO 3 ) 3 Solution 90ml, concentration is 0.15mol / L Y(NO 3 ) 3 210ml of the solution was poured into a 500ml beaker and mixed evenly to obtain a metal ion salt mixed solution;

[0060] Configure NH 4 HCO 3 and NH 4 OH mixed precipitant solution, in which, NH 4 HCO 3 The concentration is 2mol / L, NH 4 OH concentration is 2mol / L.

[0061] The precipitant solution was dropped into the metal ion salt mixed solution at a rate of 4ml / min and stirred thoroughly. Stop dripping until the pH value of the obtained solution is 7.5, continue to stir for 3 minutes, and then stop s...

Embodiment 3

[0064] A preparation method of yttrium stabilized terbium oxide magneto-optical transparent ceramics, the specific steps are:

[0065] Will Tb 2 o 3 , Y 2 o 3 Dissolve in the nitric acid solution that mass concentration is 68% respectively and react to obtain 0.15mol / L Tb(NO 3 ) 3 solution and 0.15mol / L of Y(NO 3 ) 3 solution;

[0066] Press (Tb 0.5 Y 0.5 ) 2 o 3 Chemical composition, measure Tb(NO 3 ) 3 Solution 150ml, concentration is 0.15mol / L Y(NO 3 ) 3 Solution 150ml, pour into a 500ml beaker and mix evenly to obtain a metal ion salt mixed solution;

[0067] Configure NH 4 HCO 3 and NH 4 OH mixed precipitant solution, in which, NH 4 HCO 3 The concentration is 2mol / L, NH 4 OH concentration is 2mol / L.

[0068] The precipitant solution was dropped into the metal ion salt mixed solution at a rate of 4ml / min and stirred thoroughly. Stop dripping until the pH value of the obtained solution is 7.6, continue stirring for 3 minutes, then stop stirring. Afte...

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Abstract

The invention provides an yttria-stabilized terbia powder, a magneto-optic transparent ceramic and a preparation method of the magneto-optic transparent ceramic. The preparation method of the yttria-stabilized terbia magneto-optic transparent ceramic is characterized by preparing yttria-stabilized terbia nanopowder through a wet chemistry coprecipitation method, preparing a ceramic biscuit from the yttria-stabilized terbia nanopowder, and performing pressureless sintering at 1600-1800 DEG C in a reducing atmosphere to obtain the yttria-stabilized terbia magneto-optic transparent ceramic, wherein the structural formula of the yttria-stabilized terbia magneto-optic transparent ceramic is (TbxY1-x)2O3, and 0<=x<=1. The yttria-stabilized terbia magneto-optic transparent ceramic is less prone to cracking during sintering, good in optical transmittance and high in Verdet constant.

Description

technical field [0001] The present invention relates to a kind of preparation method of the magneto-optical transparent ceramics of a kind of block shape not cracking yttrium stabilized terbium oxide, especially relate to wet chemical co-precipitation method preparation (Tb x Y 1-x ) 2 o 3 Nano-powder, and adopt pure hydrogen pressureless sintering process to prepare transparent ceramics, belonging to the field of magneto-optical transparent ceramics preparation. Background technique [0002] Magneto-optical materials can be used as important components of optical isolators based on their Faraday effect. An optical isolator is also called an optical one-way device. It can be used in laser systems and optical fiber communications. Its main function is to effectively isolate the interference of external light on the light source. The relational expression of the Faraday effect is θ=VBd (θ is the deflection angle of polarized light, B is the magnetic field strength, and d i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/50C04B35/622C04B35/626
CPCC04B35/50C04B35/622C04B35/62605C04B2235/6567C04B2235/6582C04B2235/9653
Inventor 周鼎杨美琪李哓辉徐家跃王占勇
Owner SHANGHAI INST OF TECH
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