A kind of dielectric composite material with nano-core shell and inner crystal structure and its preparation method

A composite material, nano core-shell technology, applied in circuits, electrical components, ceramics, etc., can solve problems such as performance differences, and achieve the effects of increasing dielectric constant, reducing dielectric loss, and reducing tunneling current.

Inactive Publication Date: 2017-02-22
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In summary, it can be seen that the performance of dielectric composite materials for energy storage is significantly different from that of energy harvesting materials, and it is impossible to use the same technical means to obtain

Method used

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  • A kind of dielectric composite material with nano-core shell and inner crystal structure and its preparation method
  • A kind of dielectric composite material with nano-core shell and inner crystal structure and its preparation method
  • A kind of dielectric composite material with nano-core shell and inner crystal structure and its preparation method

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Experimental program
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Effect test

Embodiment 1

[0032] According to the chemical formula Pb(Zn 1 / 15 Nb 2 / 15 Zr 2 / 5 Ti 2 / 5 )O 3 / 12vol.%Ag Weighing Ag 2 O, Pb 3 o 4 , ZnO, Nb 2 o 5 , ZrO 2 and TiO 2 , and ball milled in ethanol for 12 hours. The mixture was dried and calcined at 850°C for 2 hours, ball milled in ethanol for 12 hours, pressed directly at 100 MPa, and then sintered at 1050°C for 2 hours to obtain a composite material.

Embodiment 2

[0034] According to the chemical formula Pb(Zn 1 / 15 Nb 2 / 15 Zr 2 / 5 Ti 2 / 5 )O 3 / 16vol.%Ag Weighing Ag 2 O, Pb 3 o 4 , ZnO, Nb 2 o 5 , ZrO 2 and TiO 2 , other with embodiment 1.

Embodiment 3

[0036] According to the chemical formula Pb(Zn 1 / 15 Nb 2 / 15 Zr 2 / 5 Ti 2 / 5 )O 3 / 16.5vol.%Ag Weighing Ag 2 O, Pb 3 o 4 , ZnO, Nb 2 o 5 , ZrO 2 and TiO 2 , other with embodiment 1.

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Abstract

The invention discloses a dielectric composite material with nano core-shell and inner crystal structures and a preparation method of the of dielectric composite material, and belongs to the technical field of dielectric composite materials. Nano-scale Ag particles serve as cores. A PbO inorganic insulating material forms a shell layer. The nano core-shell structures formed by the Ag particles and the PbO inorganic insulating material serves as second-phase particles to be uniformly distributed in sub-micron-scale PZN-PZT material crystal particles, so that the inner crystal structures are formed. Sub-micron-scale PZN-PZT ceramic powder serves as a base material and the nano-scale Ag particles serve as fillers. The dielectric composite material is prepared through steps of wet grinding, drying, roasting, secondary ball milling, compression molding and sintering. The dielectric composite material is applied to an energy storage device and can be integrated with the energy collection device for storing energy recycled by the energy collection device temporally. The dielectric composite material has significant economic and social values.

Description

technical field [0001] The invention belongs to the technical field of dielectric composite materials, and in particular relates to a percolation type ferroelectric composite material with high dielectric constant and low dielectric loss that can be applied to energy storage devices and a preparation method thereof. Background technique [0002] Under the background of the energy crisis, how to collect and convert waste energy in the environment into reusable electric energy has attracted the attention of governments, academia and the general public. Among them, the energy harvesting device based on the piezoelectric effect can convert the mechanical energy generated in the environment into electrical energy. It has the characteristics of high electromechanical conversion efficiency, high output voltage, no electromagnetic interference, and no external bias, so it has broad application prospects. . Many scholars at home and abroad are devoted to the research of this work. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B3/12H01B19/00B22F1/02B22F9/20
Inventor 侯育冬郑木鹏朱满康严辉
Owner BEIJING UNIV OF TECH
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