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Method for monitoring degree of polarization orientation and relaxation behavior of polymer with ferroelectric nanocrystalline

A technology of polarization orientation and nanocrystals, which is applied in the measurement of color/spectral characteristics, etc., can solve the problems of poor thermal stability of polarization, difficulties of large single crystals, and high cost, costing hundreds of thousands or even millions of yuan, etc. problem, to achieve the effect of simple and universal instrument

Inactive Publication Date: 2011-04-06
NANJING UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

But at the same time, there are disadvantages such as poor polarization thermal stability and thermally induced refractive index change.
At present, inorganic electro-optic crystals have relatively mature technology, large nonlinear coefficient, and good stability. Many ferroelectric materials such as Pb x La 1-x (Zr 1-x Ti x )O 3 (PLZT), Sr x Ba 1-x Nb 2 o 6 (SBN), etc., all show good electro-optical properties, but the disadvantage is that it is difficult to grow a perfect large single crystal
However, an X-ray diffractometer is often expensive, costing hundreds of thousands or even several million yuan, so the cost of detection will be very high

Method used

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  • Method for monitoring degree of polarization orientation and relaxation behavior of polymer with ferroelectric nanocrystalline
  • Method for monitoring degree of polarization orientation and relaxation behavior of polymer with ferroelectric nanocrystalline
  • Method for monitoring degree of polarization orientation and relaxation behavior of polymer with ferroelectric nanocrystalline

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Embodiment 1

[0021] Embodiment 1: on ITO conductive glass, prepared lead zirconate titanate lead lanthanum Pb(Zr 0.52 T 0.48 )O 3 (PZT) bisphenol A polycarbonate (PC) composite polymer film sample (doping concentration is 10%, mass percent) of ferroelectric nanocrystal, namely PZT / PC sample, film thickness is at 1.2 microns (containing ferroelectric nanometer For the preparation method of electro-optic polarizable polymers containing ferroelectric nanocrystals, see Chinese Invention Patent No., ZL 200410014335.5, Electro-optic polarizable polymers containing ferroelectric nanocrystals and their preparation methods, Li Aidong, etc.). The sample was polarized near the vitrification process temperature by using the corona polarization process. The polarization conditions were as follows: the polarization temperature was 145°C and 165°C, the polarization voltage was 8000V, the polarization time was 20 minutes, and the polarization current was 5 -6μA.

Embodiment 2

[0022] Embodiment 2: on the ITO conductive glass, prepared containing (Pb 0.91 La 0.09 (Zr 0.65 Ti 0.35 ) 0.9775 o 3 , PLZT) bisphenol A polycarbonate (PC) composite polymer film sample (doping concentration is 10%, mass percent) of lead zirconate lanthanum titanate ferroelectric nanocrystal, namely PLZT / PC sample, film thickness is at 1.5 microns (See Chinese invention patent number, ZL200410014335.5). The sample was polarized at a vitrification temperature of 143°C by corona polarization technology, and the polarization conditions were: polarization voltage 8000V, polarization time 20 minutes, and polarization current 5-6μA. .

Embodiment 3

[0023] Embodiment 3: On the ITO conductive glass, prepared containing SrBi 2 Ta 2 o 9 (SBT) ferroelectric nanocrystalline bisphenol A polycarbonate (PC) composite polymer film sample (doping concentration is 10%, mass percentage), namely SBT / PC two kinds of samples, the film thickness is 1.5 microns (see China Invention patent number, ZL 200410014335.5). The sample was polarized at a vitrification temperature of 143°C by corona polarization technology, and the polarization conditions were: polarization voltage 8000V, polarization time 20 minutes, and polarization current 5-6μA.

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Abstract

The invention discloses a method for monitoring the degree of polarization orientation and the relaxation behavior of the polymer with ferroelectric nanocrystalline. The method comprises the following steps: using a spectrophotometer to detect the transmission spectra change situation over time of the polymer film with ferroelectric nanocrystalline under different temperatures, generating a variation curve; measuring the transmission change before and after polarization of the composite polymer film with ferroelectric nanocrystalline in visible wavelength range to calculate the corresponding degree of polarization orientation, measuring the variation curve of the transmission change over time of the polarized polymer composite film in visible wavelength range to obtain the relaxation behavior of the polarization orientation and learn the stability of the polarization orientation. The method of the invention adopts the commercial visible-ultraviolet spectrophotometer as the detecting instrument, the method is simple, the monitoring cost is low, and the data are in good fit.

Description

technical field [0001] The invention relates to a method for monitoring the degree of polarization orientation and relaxation properties in a polarized polymer system, in particular to a method for monitoring the degree of polarization orientation and relaxation properties of a polymer containing ferroelectric nanocrystals. Background technique [0002] Organic electro-optic polymer films have made great progress in recent years, and have shown a very broad application prospect in cable television and optical fiber communication network systems. Most of the electro-optic coefficients of polymer materials obtained so far are 20-30pm / V, reaching or approaching the inorganic electro-optic crystal LiNb that can be used in the manufacture of electro-optic waveguide devices. 3 level (γ 33 =30pm / V), and the dielectric constant is very small, the linear electro-optic figure of merit F 2 =n 3 The γ / ε is excellent, and the electro-optic response speed reaches the sub-picosecond to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/33
Inventor 李爱东刘文超谭静吴迪
Owner NANJING UNIV
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