Lanthanum-doped lead zirconate titanate electro-optic scattering transparent ceramic and preparation method thereof

A technology of lead zirconate titanate and transparent ceramics, which is applied in the field of lanthanum-doped lead zirconate titanate electronically controlled light scattering transparent ceramics and its preparation, which can solve the problems of high difficulty in preparation and neglect of electrically controlled light scattering transparent ceramic materials, preparation and performance Research stagnation and other issues to achieve close contact between grains and eliminate pore defects

Active Publication Date: 2013-12-18
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The research report on lanthanum-doped lead zirconate titanate electronically controlled light-scattering transparent ceramics began in the early 1970s. Foreign scholar Land (Applied Physics Letters, 20, 169, 1972) first The electrically controlled light scattering effect of ferroelectric transparent ceramics was reported, and then Kumada (Ferroelectrics, 10, 25, 1976) et al. explored the PLZT (X / 65 / 35) series of transparent ceramics However, due to the sudden emergence of electronically controlled light-scattering liquid crystal materials and their excellent performance in optical display and optical storage applications, it is difficult to prepare electronically controlled light-scattering transparent The research on ceramic materials has been neglected, so that the preparation and performance research of this series of materials has been stagnant for more than 30 years, and the research on the electronically controlled light scattering effect of transparent electro-optic ceramics in laser modulation has not been reported.

Method used

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  • Lanthanum-doped lead zirconate titanate electro-optic scattering transparent ceramic and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0065] by Pb 1-x La x (Zr y Ti 1-y ) 1-x / 4 o 3 , where x=0.070, y=0.66 ingredients, using φ5mm and φ8mm ZrO 2 The mixed balls were used as the ball milling medium for ball milling for 12 hours. After drying, the obtained raw meal was ground into powder, and then sieved to keep the components uniform. Add a PVA binder with a mass concentration of 6%, the molding pressure is 50MPa, and the molding mold is a φ35×30 cylinder, and then sintered by oxygen-hot pressing. The parameters of the sintering process are:

[0066] Raise the temperature from room temperature to 900°C at a heating rate of 200°C / hour, and keep the temperature for 1 hour; then raise the temperature at 100°C / hour, and gradually pressurize to 40MPa, then keep the pressure constant, after raising the temperature to 1180°C, keep the temperature for 2 hours, Then the temperature was raised to 1280°C at 200°C / hour, the pressure was released after 10 hours of heat preservation and pressure, and the temperature wa...

Embodiment 2

[0068] by Pb 1-x La x (Zr y Ti 1-y ) 1-x / 4 o 3 , where x=0.078, y=0.69 ingredients, using φ5mm and φ8mm ZrO 2 The mixed balls were used as the ball milling medium for ball milling for 12 hours. After drying, the obtained raw meal was ground into powder, and then sieved to keep the components uniform. Add a PVA binder with a mass concentration of 6%, the molding pressure is 50MPa, and the molding mold is a φ35×30 cylinder, and then sintered by oxygen-hot pressing. The parameters of the sintering process are:

[0069] Raise the temperature from room temperature to 900°C at a heating rate of 200°C / hour, and keep the temperature for 1 hour; then raise the temperature at 100°C / hour, and gradually pressurize to 40MPa, then keep the pressure constant, after raising the temperature to 1180°C, keep the temperature for 2 hours, Then the temperature was raised to 1280°C at 200°C / hour, the pressure was released after 10 hours of heat preservation and pressure, and the temperature wa...

Embodiment 3

[0071] by Pb 1-x La x (Zr y Ti 1-y ) 1-x / 4 o 3 , where x=0.080, y=0.69 ingredients, using φ5mm and φ8mm ZrO 2 The mixed balls were used as the ball milling medium for ball milling for 12 hours. After drying, the obtained raw meal was ground into powder, and then sieved to keep the components uniform. Add a PVA binder with a mass concentration of 6%, the molding pressure is 50MPa, and the molding mold is a φ35×30 cylinder, and then sintered by oxygen-hot pressing. The parameters of the sintering process are:

[0072] Raise the temperature from room temperature to 900°C at a heating rate of 200°C / hour, and keep the temperature for 1 hour; then raise the temperature at 100°C / hour, and gradually pressurize to 40MPa, then keep the pressure constant, after raising the temperature to 1180°C, keep the temperature for 2 hours, Then the temperature was raised to 1280°C at 200°C / hour, the pressure was released after 10 hours of heat preservation and pressure, and the temperature wa...

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Abstract

The invention relates to the field of transparent functional ceramic materials, and in particular relates to lanthanum-doped lead zirconate titanate electro-optic scattering transparent ceramic and a preparation method thereof. A general formula of the lanthanum-doped lead zirconate titanate electro-optic scattering transparent ceramic is represented as Pb1-xLax(ZryTi1-y)1-x/4O3 (PLZT), wherein x is no more than 0.100 and no less than 0.040, and y is no more than 0.75 and more than 0.65. The preparation method adopts an aerating-hot pressing sintering processing, wherein oxygen flow in the entire sintering process is 3-5L/min, sintering temperature is 1200-1280 DEG C, heat preservation duration is 8-24 hours and pressure is 20-60Mpa. The lanthanum-doped lead zirconate titanate electro-optic scattering transparent ceramic has a unique perovskite-phase structure, which is uniform in microstructure and free from a defect of micropores. And the electro-optic scattering transparent ceramic is applicable to photoswitches, optical attenuators, opto-isolators and other optical modulator aspects.

Description

technical field [0001] The invention relates to the field of transparent functional ceramic materials, in particular to a lanthanum-doped lead zirconate titanate electrically controlled light-scattering transparent ceramic and a preparation method thereof. Background technique [0002] With the continuous development of modern optical communication technology and laser technology, the functional requirements of various laser systems for optical modulators are increasing, and there is an urgent need for electronic control components that can modulate and switch various types of optical information, especially for new high-speed dynamic electro-optic The demand for optical modulation functional devices such as optical switches, optical attenuators, and optical isolators is very urgent. In the high-speed dynamic electro-optic modulator, the key core is the functional optical material that realizes the modulation of light intensity, phase or direction. Such optical material is r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/491C04B35/622
Inventor 何夕云夏彬郑鑫森仇萍荪程文秀曾霞
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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