Composite material with capacitance and inductance performance and its preparing method

A composite material, capacitor-inductor technology, applied in the direction of fixed capacitor dielectrics, fixed capacitor components, etc., can solve the problems of high temperature co-firing, high energy consumption, easy cracking in ceramic technology, and achieve lower molding temperature, good performance, high The effect of dielectric constant

Active Publication Date: 2006-06-07
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above facts show that (1) although the ferroelectric / ferromagnetic ceramic composite system can realize the coexistence of capacitive and inductive, the ceramic process requires high temperature co-firing, high energy consumption, and easy cracking; (2) respectively have high dielectric constant, or Polymer matrix composites with high initial permeability have been studied to a certain extent, but polymer matrix composites with both high dielectric constant and high initial permeability have not been studied

Method used

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  • Composite material with capacitance and inductance performance and its preparing method
  • Composite material with capacitance and inductance performance and its preparing method
  • Composite material with capacitance and inductance performance and its preparing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] According to the formula listed in Table 1, weigh appropriate amount of nickel powder, polyvinylidene fluoride and 2.4g of nickel-zinc ferrite powder, mix them evenly, place them in a mold, and heat-press at 200°C and 15MPa for 15 minutes to form. Series samples. The double percolation structure can be verified from the microstructure photos of the sample, such as figure 1 Shown. The initial magnetic permeability of the sample varies with the volume percentage of nickel particles as follows: figure 2 As shown, the simulation results using Maxwell-Garnett formula and Bruggeman-Hanai formula are also shown in figure 2 in. The law of initial permeability and quality factor changing with frequency is as follows image 3 Shown. The sample conductivity and dielectric constant change with the volume percentage of nickel particles as follows: Figure 4 Shown in.

[0029] serial number

[0030] Note: Each composite material contains 60vol% nickel-zinc ferrite with a we...

Embodiment 2

[0032] According to the formula listed in Table 2, weigh the appropriate amount of nickel powder, polyvinylidene fluoride and 1.65g Z-type flat hexagonal ferrite powder, mix them uniformly, and place them in the mold, and heat-press at 200°C and 15MPa for 15 minutes. A series of samples can be obtained. The double percolation structure can be verified from the microstructure photos of the sample, such as Figure 5 Shown. The initial permeability of the sample changes with the volume percentage of nickel particles as follows: Figure 6 As shown, the simulation results using Maxwell-Garnett formula and Bruggeman-Hanai formula are also shown in Figure 6 in. The initial permeability and quality factor of the sample change with frequency as followsFigure 7 Shown. The electrical conductivity and dielectric constant of the sample change with the volume percentage of nickel particles as follows: Figure 8 Shown in.

[0033] serial number

[0034] Note: Each composite materia...

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Abstract

The present invention relates to a kind of composite material with capacitance and inductance performance, and belongs to the field of electronic composite material technology. The composite material is ternary composite material Ni0.3Zn0.7Fe1.95O4-Ni-PVDF and ternary composite material Ba3Co2Fe23O41-Ni-PVDF. It is prepared through mixing ferrite, metal nickel grain and polyvinylidene fluoride, and molding the mixture at temperature of 180-220 deg C and pressure of 10-15 MPa for 20 min. The Ni0.3Zn0.7Fe1.95O4-Ni-PVDF system has initial magnetic permeability of about 30 in the pressure below 10 MHz and dielectric constant at 1 KHz below up to about 200; and the Ba3Co2Fe23O41-Ni-PVDF system has initial magnetic permeability of about 4.0 in the pressure below 500 MHz and dielectric constant at 10 MHz below up to about 130. The composite material possesses unique double seepage structure, and has low preparation temperature, simple preparation process and excellent industrial application foreground.

Description

Technical field [0001] The invention belongs to the technical field of electronic composite material preparation, and in particular relates to a new type of capacitor / inductance integrated composite material that has both high dielectric constant and high initial permeability, both capacitive and inductance, low preparation temperature and simple process, and its preparation method. Background technique [0002] At present, in the microelectronics industry, more than 98% of passive devices such as capacitors and inductors use discrete components, which occupy more than 70% of the circuit board space. Discrete components are now a major obstacle to the further reduction of microelectronic systems. In order to overcome this obstacle, passive devices are required to achieve multi-functional integration, and at the same time, embedded components are used to achieve overall packaging. At present, chip LC components integrating chip capacitors and chip inductors have appeared. General ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26C04B35/622C04B35/645H01G4/12
Inventor 南策文沈洋李宝文
Owner TSINGHUA UNIV
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