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PLZT micron seed crystal, preparation method thereof and application of PLZT micron seed crystal in induction of ceramic growth

A technology of microcrystalline and ceramics, applied in chemical instruments and methods, inorganic chemistry, titanate, etc., can solve the problems of high energy consumption of materials, limited application range, high threshold electric field, etc., and achieve good dispersion, excellent material performance, and threshold The effect of electric field reduction

Active Publication Date: 2021-11-30
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the two modes, the advantage of the transverse electric field mode is a higher optical switching ratio and faster response speed, while the disadvantage of the transverse electric field mode is that the threshold electric field is high, and the higher threshold electric field marks the material when it is applied. Has higher energy consumption, which limits its application range

Method used

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  • PLZT micron seed crystal, preparation method thereof and application of PLZT micron seed crystal in induction of ceramic growth
  • PLZT micron seed crystal, preparation method thereof and application of PLZT micron seed crystal in induction of ceramic growth
  • PLZT micron seed crystal, preparation method thereof and application of PLZT micron seed crystal in induction of ceramic growth

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preparation example Construction

[0045] In the present invention, the preparation method of PLZT micro-seed is gel-hydrothermal method, which mainly includes three steps: preparation of precursor, hydrothermal reaction and post-treatment. The generated PLZT micron seeds are pure perovskite phase, and the appearance is cubic particles, which are flat and uniform, and have good dispersion. The purity of the powder obtained after repeated separation and filtration is about 100%.

[0046] In the present invention, the preparation method of micron-seed-induced-growth electronically-controlled light-scattering ceramics may include: weighing, ball milling and mixing, drying, sieving, granulating, molding, and oxygen-passed hot-press sintering. Wherein the PLZT micron seeds are added in the mixing stage of ball milling.

[0047] After cutting and polishing the electronically controlled light-scattering ceramics induced by micron seed crystals, electrodes are made on both ends of the sample perpendicular to the light...

Embodiment 1

[0051] According to Pb 1-x La x (ZryTi 1-y ) 1-x / 4 o 3 , wherein x=0.08, y=0.68 (referred to as PLZT (8 / 68 / 32)) batching, lead ethylate, lanthanum isopropoxide, zirconium n-propoxide, tetrabutyl titanate are weighed according to stoichiometric ratio (solute) , dissolved in 2 parts (1 part means adding 100g of solute to 100mL solution, and so on) in ethylene glycol methyl ether solution, and stirred until the solution was clear and transparent. Then add 3 parts of ammonia water (about 14M) to form a white colloid. The gel obtained by washing and filtering with deionized water is the seed crystal precursor. Then add 2M mineralizer KOH to the precursor, and hydrothermally treat it at 230°C for 16h; after hydrothermal synthesis, the resulting product is repeatedly washed with deionized water and filtered, and dried at 90°C for 24h to obtain PLZT micron seeds Powder. image 3 Morphology and XRD phase structure for the preparation of hydrothermal micro-seeds.

preparation Embodiment 2

[0053] According to Pb 1-x La x (ZryTi 1-y ) 1-x / 4 o 3 , wherein x=0.08, y=0.68 (referred to as PLZT (8 / 68 / 32)) batching, lead ethylate, lanthanum isopropoxide, zirconium n-propoxide, tetrabutyl titanate are weighed according to stoichiometric ratio (solute) , dissolved in 2 parts of ethylene glycol methyl ether solution, and stirred until the solution was clear and transparent. Then add 3 parts of ammonia water (about 14M) to form a white colloid. The gel obtained by washing and filtering with deionized water is the seed crystal precursor. Then add 2M mineralizer KOH to the precursor, and hydrothermally treat it at 230°C for 24h; after hydrothermal synthesis, the product obtained is washed repeatedly with deionized water and filtered, and dried at 90°C for 24h to obtain PLZT micron seeds Powder. Figure 4 Morphology and XRD phase structure for the preparation of hydrothermal micro-seeds.

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Abstract

The invention relates to a PLZT micron seed crystal, a preparation method thereof and application of the PLZT micron seed crystal in induction of ceramic growth. The general formula of the lead lanthanum zirconate titanate micron seed crystal is Pb<1-x>La<x>(Zr<y>Ti<1-y>)<1-x / 4>O<3>, x is more than or equal to 0.040 and less than or equal to 0.100, and y is more than 0.65 and less than or equal to 0.75, and the particle size of the lead lanthanum zirconate titanate micron seed crystal is micron-sized.

Description

technical field [0001] The invention relates to a lead lanthanum zirconate titanate micron seed crystal and a preparation method thereof, and a method for preparing electrically controlled light-scattering PLZT ceramics induced by the lead lanthanum zirconate titanate micron seed, belonging to the field of seed crystal powder preparation and ceramic modification. Background technique [0002] With the continuous development of optical communication and laser technology, various optical systems have increasingly urgent demands for optical modulation devices such as optical switches, optical attenuators, and optical isolators, especially high-speed dynamic electro-optic modulation devices based on electro-optical effects. In electro-optic modulators, electro-optic ceramics represented by PLZT and PLMNT have good light transmission performance, and have the advantage of fast response speed (nanosecond order) compared with liquid crystal materials, while LiNbO 3 Compared with cr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G25/00C04B35/491
CPCC01G23/003C04B35/491C04B2235/768C04B2235/786C04B2235/3227
Inventor 曾霞何夕云仇萍荪凌亮宗兴盛
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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