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Ferroelectric powder polarization device and method

A powder, ferroelectric technology, applied in circuits, electrical components, piezoelectric/electrostrictive/magnetostrictive devices, etc., can solve problems such as polarization of ferroelectric powder materials, and achieve convenient operation and polarization methods. simple effect

Inactive Publication Date: 2019-10-15
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problem of polarization of ferroelectric powder materials, the object of the present invention is to provide a polarization device and method for ferroelectric powder materials

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  • Ferroelectric powder polarization device and method
  • Ferroelectric powder polarization device and method

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Embodiment 1

[0029] This embodiment provides a ferroelectric powder polarization device, such as Figures 1 to 2 As shown, the device includes a copper sheet 1 as a connecting electrode, and a mold 3 filled with ferroelectric powder; the mold 3 is placed between the two copper sheets 1, and the mold 3 is made of polydimethylsiloxane PDMS become.

[0030] The mold 3 is a cuboid with a length and width of 3 cm and a height of 0.3 cm; the cuboid has a hollow cavity 2 with openings at both ends, and the opening is located on a rectangular surface formed by the length and width of the cuboid, and the ferroelectric powder is filled in the hollow cavity 2. chamber 2. The hollow cavity 2 is cylindrical, and the diameter of the bottom surface of the cylinder is 1 cm; the height of the cylinder is the height of a cuboid. The copper sheet 1 is a cuboid with a thickness of 0.2 cm and a length and width of 4 cm.

[0031] This embodiment also provides a method for polarizing ferroelectric powder usin...

Embodiment 2

[0036] The present embodiment provides a ferroelectric powder polarization device, said device comprising a copper sheet 1 as a connection electrode and a mold 3 filled with ferroelectric powder; the mold 3 is placed between two copper sheets 1, Mold 3 is made of polydimethylsiloxane PDMS.

[0037] The mold 3 is a cuboid with a length and width of 3 cm and a height of 0.1 cm; the cuboid has a hollow cavity 2 with openings at both ends, and the opening is located on a rectangular surface formed by the length and width of the cuboid, and the ferroelectric powder is filled in the hollow cavity 2. chamber 2. The hollow cavity 2 is cylindrical, and the diameter of the bottom surface of the cylinder is 1 cm; the height of the cylinder is the height of a cuboid. The copper sheet 1 is a cuboid with a thickness of 0.2 cm and a length and width of 4 cm.

[0038] This embodiment also provides a method for polarizing ferroelectric powder using the device, comprising the steps of:

[00...

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Abstract

The invention discloses a ferroelectric powder polarization device and method. The polarization device comprises a copper sheet as a conductor for connecting an electrode, and a flexible insulator material is adopted as a mold for filling ferroelectric powder. According to the polarization method, direct polarization of the ferroelectric powder material is possible by applying a polarization voltage, and the thickness of the polarized powder is changed by changing the thickness of the PDMS mold, so that the effects of uniform polarized powder and enhanced polarization are achieved, and a simple and convenient method is provided for achieving polarization of the ferroelectric powder.

Description

technical field [0001] The invention belongs to the field of polarization technology, and in particular relates to a polarization device for ferroelectric powder materials and a polarization method using the polarization device. Background technique [0002] Ferroelectrics are the most widely studied and applied piezoelectric materials. The so-called ferroelectric refers to a class of materials that have spontaneous polarization, and the spontaneous polarization can be reversed with an external electric field. For an ideal single-crystal single-domain ferroelectric, the spontaneous polarization orientation within the crystal is consistent. However, this state is thermodynamically extremely unstable, because the bound charges accumulated on the surfaces of both ends of the crystal will create an electric field in the crystal that is opposite to the direction of the spontaneous polarization, which is called the depolarization field, thereby improving the stability of the syst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L41/257H10N30/045
CPCH10N30/045
Inventor 宁成云肖才榕黎昌昊范磊于鹏冉合迎
Owner SOUTH CHINA UNIV OF TECH
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