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Modeling and simulation method for influence of TiO2 dimension on dielectric property of TiO2/PVDF composite material

A technology of dielectric properties and composite materials, applied in the direction of design optimization/simulation, electrical digital data processing, special data processing applications, etc., can solve the problem of not being able to directly reflect the microscopic performance distribution of composite materials, and not being able to better analyze and determine the performance impact, etc. problem, to achieve the effects of small distortion, reduced leakage current density and energy density area, and strong breakdown resistance

Pending Publication Date: 2021-02-05
HARBIN UNIV OF SCI & TECH
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Problems solved by technology

[0006] In view of the above problems, the present invention proposes a TiO 2 Dimension vs. TiO 2 The modeling and simulation method of the influence of the dielectric properties of PVDF composite materials is used to solve the problem that the existing technology cannot directly reflect TiO 2 / PVDF composite internal micro-property distribution, so can not better analyze and determine TiO 2 Effect of Filler Phase on Dielectric Properties of Composite Materials

Method used

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  • Modeling and simulation method for influence of TiO2 dimension on dielectric property of TiO2/PVDF composite material
  • Modeling and simulation method for influence of TiO2 dimension on dielectric property of TiO2/PVDF composite material
  • Modeling and simulation method for influence of TiO2 dimension on dielectric property of TiO2/PVDF composite material

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specific Embodiment 1

[0039] TiO in different dimensions 2 Modeling and simulation of 3D model of PVDF nanocomposite:

[0040] 1) To study TiO 2 Dimension vs. TiO 2 / PVDF nanocomposite dielectric properties, by using COMSOL for zero-dimensional and one-dimensional TiO 2 The electric field simulation of the doped nanocomposite was simulated.

[0041] TiO 2 / PVDF nanocomposite 3D model such as figure 2 As shown, the size of the model is 100nm × 100nm × 100nm, the sphere represents the internal filler, and the rest of the space represents the matrix. In the simulation, a terminal 1000V is added to the upper plate, the lower plate is grounded, and the rest of the plates are electrically insulated. Using the current conservation model, zero-dimensional TiO 2 , one-dimensional TiO 2 , The permittivity of PVDF is set to 48, 48, 8.26 respectively, and the conductivity is 10 -10 S / m, 10 -10 S / m, 10 -15 S / m, of which spherical TiO 2 25 nm diameter, TiO 2 Nanowire aspect ratio 1:5, TiO 2 The vo...

specific Embodiment 2

[0052] TiO in different dimensions 2 Modeling and simulation of two-dimensional model of PVDF nanocomposite:

[0053] 1) In nanocomposite films, the interfacial interaction between the filler and the matrix often has a great influence on the dielectric properties of the nanocomposite films. In order to further study the different dimensions of TiO 2 Filler interface to nano TiO 2 / PVDF composite film dielectric properties, established a two-dimensional vertical model, the size is similar to the three-dimensional model, the parameter settings are basically the same, different dimensions TiO 2 The doping amount is the same, both are 5vol%. Using COMSOL5.4 for zero-dimensional and one-dimensional TiO 2 / PVDF composite material internal electric field strength simulation.

[0054] TiO in different dimensions 2 / PVDF composite electric field strength distribution as Figure 6 shown. Obviously, with different dimensions of TiO 2 Addition of filler, TiO 2 The electric field ...

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Abstract

The invention relates to a modeling and simulation method for influence of TiO2 dimension on dielectric properties of a TiO2 / PVDF composite material, belongs to the technical field of composite material dielectric property research, and is used for solving the problem that the influence of TiO2 filler appearance on the dielectric properties of the composite material cannot be better analyzed and determined because the internal microscopic property distribution of the TiO2 / PVDF composite material cannot be intuitively reflected in the prior art. A finite element method is adopted to simulate and simulate the structure and performance of a TiO2 / PVDF composite material system, a two-dimensional model and a three-dimensional model are established, the breakdown mechanism of the composite material is systematically researched from the aspects of electric field intensity, leakage current density and system energy density distribution, and then the influence of filler morphology on the dielectric property of the composite material is researched. Simulation results show that the one-dimensional TiO2 / PVDF composite material has higher breakdown resistance. On one hand, the method is used for systematically researching the dielectric property improvement mechanism of the composite material, on the other hand, the development of the composite material with high energy storage density canbe guided, the research and development cost is reduced, and the research and development period is shortened.

Description

technical field [0001] The invention relates to the technical field of research on the dielectric properties of composite materials, in particular to a TiO 2 Dimension vs. TiO 2 Modeling and simulation method for influence of dielectric properties of PVDF composites. [0002] technical background [0003] With the rapid development of the electronics industry, people's demand for electric energy storage equipment is increasing day by day, among which energy storage capacitors are attracting more and more attention due to their advantages of fast charging, fast discharging and high energy storage density. In small-scale energy storage, especially in microelectronics, dielectric capacitors still dominate the market due to their transient response characteristics, high power density, and allowing operation at high frequencies (GHz). [0004] In recent years, several studies have shown that filler morphology can significantly improve the dielectric properties of composites. Al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/23G06F113/26
CPCG06F30/23G06F2113/26
Inventor 单学文殷景华
Owner HARBIN UNIV OF SCI & TECH
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