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Electro-optical polarized polymer containing nano ferroelectric crystals, and preparation method

A technology of polarized polymers and nanocrystals, applied in the field of electro-optic polarized polymers and their preparation, can solve problems such as SBN and PZT single crystal difficulties, and achieve the effects of low cost, strong application prospects, and low optical loss

Inactive Publication Date: 2006-09-06
NANJING UNIV
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Problems solved by technology

[0003] Ferroelectric material Sr x Ba 1-x Nb 2 o 6 (SBN), Pb(Zr x Ti 1-x )O 3 (PZT) and (Pb 1-y La y )(Zr x Ti 1-x )O 3 (PLZT) has a large electro-optic coefficient, but it is very difficult to grow large and perfect SBN and PZT single crystals

Method used

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  • Electro-optical polarized polymer containing nano ferroelectric crystals, and preparation method
  • Electro-optical polarized polymer containing nano ferroelectric crystals, and preparation method
  • Electro-optical polarized polymer containing nano ferroelectric crystals, and preparation method

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Embodiment Construction

[0014] Selection of ferroelectric nanocrystalline materials: ferroelectric nanocrystalline materials: barium strontium niobate (Sr x Ba 1-x Nb 2 o 6 , x=0.25-0.75, SBN), lead zirconate titanate (Pb(Zr x Ti 1-x )O 3 , x=0-0.94, PZT), lanthanum-doped lead zirconate titanate (Pb 1-y La y )(Zr x Ti 1-x )O 3 , y=0.02-0.30, x=0-1.00, PLZT), barium titanate BaTiO 3 , lithium niobate LiNbO 3 Both are materials with large electro-optic coefficients (20-60pm / V). The invention makes use of its large electro-optic coefficient to make a special material.

[0015] Ferroelectric nanocrystals are prepared by a precursor solution, the polymer matrix material is dissolved in a polar solvent, and the precursor solution and the polar solvent are placed on a single crystal silicon wafer or a platinum-coated silicon wafer, commercial ITO conductive glass, or quartz glass, etc. Composite polymer film preparation on the substrate material: deposit the film by spin-coating or dip-coating,...

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Abstract

In the method, ferroelectric nonocrystal is distributed uniformly in transparent film polymer as ferroelectric material is made from strontium barium niobate, lead zirconate titanate, lanthanum doped lead zirconate titanate, BaTiO3, LiNbO3, or LiTaO3 with nanocrystal particle diameter of 20-80 nm; polymer base material is made from polymethyl methyl acrylate, polycarbonate, polyimide sort and thermoplastic polyamic acid. The prepare process includes polymerizing ferroelectric nanocrystal in the polymer in polymerization procedure of dissolving nanocrystal and polymer in polar solvent and depositing film by soaking or spinning.

Description

1. Technical field [0001] The invention relates to an electro-optical polarized polymer containing ferroelectric nanocrystals and a preparation method thereof. 2. Background technology [0002] Polarized polymers are polymer materials with macroscopic second-order nonlinearity. They have the characteristics of fast response time, easy modification, easy integration, and easy processing. They have important applications in integrated optoelectronic devices and photonic devices. In recent years, WDM (Wavelength Division Multiplexing) all-optical network has developed rapidly, and the speed of optical switches has become a bottleneck problem restricting the development of optical communication, which makes polarized polymer materials become the key materials in the development of WDM. At present, the well-developed mechanical switches, acousto-optic switches and inorganic waveguide switches represented by lithium niobate limit their long-term application due to slow response sp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L79/08C08K3/24
Inventor 李爱东刘文超谭静吴迪闵乃本
Owner NANJING UNIV
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