Transparent electro-optical ceramic material with high electro-optical coefficient and high temperature stability and preparation method thereof

Abstract

The invention relates to a transparent electro-optic ceramic material with high electro-optic coefficient and high temperature stability and a preparation method thereof. The element composition of the ceramic material is (Pb1-xLnx) [(Mg1 / 3Nb2 / 3) yTi1-y] 1-x / 4O3, Ln is a rare earth element, x is more than or equal to 0.01 and less than or equal to 0.05, y is more than or equal to 0.90 and less than or equal to 0.70, and x is more than or equal to 0.01 and less than or equal to 0.05. And the rare earth doping content in the ceramic material is in gradient distribution along the thickness direction of the ceramic material. The method comprises the following steps: firstly, synthesizing PMN-PT ceramic powder with different rare earth doping contents, sequentially stacking, filling and forming the different PMN-PT ceramic powder according to the doping contents, and carrying out hot pressed sintering in an oxygen atmosphere after glue discharging. Rare earth doping elements in the ceramic form component gradient through diffusion in the sintering process. Compared with the prior art, the method provided by the invention can be used for preparing the electro-optical ceramic with high electro-optical coefficient and high temperature stability, and can meet the requirement of an optical modulator on the temperature stability of an electro-optical material.

Description

technical field

[0001] The invention relates, in particular, to a transparent electro-optic ceramic material with high electro-optic coefficient and high temperature stability and a preparation method thereof. Background technique

[0002] Under the action of electric field, the refractive index of electro-optic material will change. Using the electro-optic effect of electro-optic materials, the modulation of light intensity, phase and polarization state can be achieved. Electro-optical materials, as the core materials of optical switches and optical modulators, are widely used in many fields such as optical communication.

[0003] The commonly used electro-optic materials are KDP and LiNbO. 3 Single crystal, in which KDP has a high anti-laser damage threshold, but has a low electro-optic coefficient and is easy to deliquescence; while LiNbO 3 The electro-optic coefficient of single crystal is higher than that of KDP single crystal, but the anti-laser damage threshold is ...

Examples

Embodiment 1

[0040] The present embodiment provides a method for preparing a transparent electro-optic ceramic material with high electro-optic coefficient and high temperature stability, comprising the following steps:

[0041] a) According to MgNb 2 O 6 General formula for accurate weighing of stoichiometric ratios of MgO and Nb 2 O 5 , using deionized water as the medium, planetary ball milling for 6 hours, calcined at 1100 °C for 4 hours, and using deionized water as the medium again, planetary ball milling for 6 hours to obtain MgNb 2 O 6 ceramic powder;

[0042] b) According to (Pb 1-x Ln x )[(Mg 1 / 3 Nb 2 / 3 ) y Ti 1-y ] 1-x / 4 O 3 The general formula, wherein the rare earth element Ln is La, y=0.75, the doping content of the rare earth element La is x=0.02, 0.03, 0.04, respectively, and the stoichiometric ratios of PbO and TiO are accurately weighed 2 , La 2 O 3 Add the MgNb obtained in step a) 2 O 6 In the ceramic powder, deionized water was used as the medium, plane...

Embodiment 2

[0050] The present embodiment provides a method for preparing a transparent electro-optic ceramic material with high electro-optic coefficient and high temperature stability, comprising the following steps:

[0051] a) According to MgNb 2 O 6 General formula for accurate weighing of stoichiometric ratios of MgO and Nb 2 O 5 , using alcohol as the medium, planetary ball milling for 6 hours, calcined at 1100 ℃ for 4 hours, using alcohol as the medium again, planetary ball milling for 6 hours, to obtain MgNb 2 O 6 ceramic powder;

[0052] b) According to (Pb 1-x Ln x )[(Mg 1 / 3 Nb 2 / 3 ) y Ti 1-y ] 1-x / 4 O 3 The general formula, wherein the rare earth element Ln is La, y=0.80, the doping content of the rare earth element La is x=0.01, 0.02, 0.03, respectively, and the stoichiometric ratios of PbO and TiO are accurately weighed 2 , La 2 O 3 Add the MgNb obtained in step a) 2 O 6 In the ceramic powder, using alcohol as the medium, planetary ball milling for 6 hours, ...

technical field

[0001] The invention relates, in particular, to a transparent electro-optic ceramic material with high electro-optic coefficient and high temperature stability and a preparation method thereof. Background technique

[0002] Under the action of electric field, the refractive index of electro-optic material will change. Using the electro-optic effect of electro-optic materials, the modulation of light intensity, phase and polarization state can be achieved. Electro-optical materials, as the core materials of optical switches and optical modulators, are widely used in many fields such as optical communication.

[0003] The commonly used electro-optic materials are KDP and LiNbO. 3 Single crystal, in which KDP has a high anti-laser damage threshold, but has a low electro-optic coefficient and is easy to deliquescence; while LiNbO 3 The electro-optic coefficient of single crystal is higher than that of KDP single crystal, but the anti-laser damage threshold is ...

Examples

Embodiment 1

[0040] The present embodiment provides a method for preparing a transparent electro-optic ceramic material with high electro-optic coefficient and high temperature stability, comprising the following steps:

[0041] a) According to MgNb 2 O 6 General formula for accurate weighing of stoichiometric ratios of MgO and Nb 2 O 5 , using deionized water as the medium, planetary ball milling for 6 hours, calcined at 1100 °C for 4 hours, and using deionized water as the medium again, planetary ball milling for 6 hours to obtain MgNb 2 O 6 ceramic powder;

[0042] b) According to (Pb 1-x Ln x )[(Mg 1 / 3 Nb 2 / 3 ) y Ti 1-y ] 1-x / 4 O 3 The general formula, wherein the rare earth element Ln is La, y=0.75, the doping content of the rare earth element La is x=0.02, 0.03, 0.04, respectively, and the stoichiometric ratios of PbO and TiO are accurately weighed 2 , La 2 O 3 Add the MgNb obtained in step a) 2 O 6 In the ceramic powder, deionized water was used as the medium, plane...

Embodiment 2

[0050] The present embodiment provides a method for preparing a transparent electro-optic ceramic material with high electro-optic coefficient and high temperature stability, comprising the following steps:

[0051] a) According to MgNb 2 O 6 General formula for accurate weighing of stoichiometric ratios of MgO and Nb 2 O 5 , using alcohol as the medium, planetary ball milling for 6 hours, calcined at 1100 ℃ for 4 hours, using alcohol as the medium again, planetary ball milling for 6 hours, to obtain MgNb 2 O 6 ceramic powder;

[0052] b) According to (Pb 1-x Ln x )[(Mg 1 / 3 Nb 2 / 3 ) y Ti 1-y ] 1-x / 4 O 3 The general formula, wherein the rare earth element Ln is La, y=0.80, the doping content of the rare earth element La is x=0.01, 0.02, 0.03, respectively, and the stoichiometric ratios of PbO and TiO are accurately weighed 2 , La 2 O 3 Add the MgNb obtained in step a) 2 O 6 In the ceramic powder, using alcohol as the medium, planetary ball milling for 6 hours, ...

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