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Preparation method of BaTiO3/CoFe2O4/BaTiO3 nano multilayer composite magnetoelectric ceramic

A nano-multi-layer, cofe2o4 technology, applied in the field of electronic information component materials, can solve the problems of multi-layer composite ceramics, such as unrecorded, complicated process, difficult to repeat, etc., and achieve the effect of short cycle, simple operation and low cost

Inactive Publication Date: 2018-07-10
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

More and more methods are used to prepare CoFe 2 o 4 -BaTiO 3 Composite ceramics, magnetoelectric materials prepared by some processes also have good magnetoelectric properties, but the cost is high and the process is complicated and not easy to repeat
At present, BaTiO is prepared by plasma discharge sintering technology. 3 / CoFe 2 o 4 / BaTiO 3 Multilayer composite ceramics are not recorded in domestic and foreign literature

Method used

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  • Preparation method of BaTiO3/CoFe2O4/BaTiO3 nano multilayer composite magnetoelectric ceramic
  • Preparation method of BaTiO3/CoFe2O4/BaTiO3 nano multilayer composite magnetoelectric ceramic
  • Preparation method of BaTiO3/CoFe2O4/BaTiO3 nano multilayer composite magnetoelectric ceramic

Examples

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Effect test

Embodiment 1

[0029] A certain amount of CoFe with a particle size of about 30nm 2 o 4 Put it into a carbon abrasive with an inner diameter of 10mm and an outer diameter of 40mm, put the abrasive into a plasma discharge sintering machine, and apply a pressure of 60MPa to compact the powder into a sheet. In this step, the abrasive CoFe 2 o 4 The amount controls the thickness of the sheet. A certain amount of BaTiO with a particle size of about 600 nm 3 Put it into a carbon abrasive with an inner diameter of 10mm and an outer diameter of 40mm, put the abrasive into a plasma discharge sintering machine, and apply a pressure of 60MPa to compact the powder into a sheet. In this step, the abrasive BaTiO 3 The amount controls the thickness of the sheet. Prepressed CoFe 2 o 4 and BaTiO 3 Chips according to BaTiO 3 / CoFe 2 o 4 / BaTiO 3 The order of loading into the carbon grinding tool with an inner diameter of 10mm and an outer diameter of 40mm, by controlling the amount of powder in ste...

Embodiment 2

[0032] A certain amount of CoFe with a particle size of about 40nm 2 o 4 Put it into a carbon abrasive with an inner diameter of 10mm and an outer diameter of 40mm, put the abrasive into a plasma discharge sintering machine, and apply a pressure of 60MPa to compact the powder into a sheet. In this step, the abrasive CoFe 2 o 4 The amount controls the thickness of the sheet. A certain amount of BaTiO with a particle size of about 500 nm 3 Put it into a carbon abrasive with an inner diameter of 10mm and an outer diameter of 40mm, put the abrasive into a plasma discharge sintering machine, and apply a pressure of 60MPa to compact the powder into a sheet. In this step, the abrasive BaTiO 3 The amount controls the thickness of the sheet. Prepressed CoFe 2 o 4 and BaTiO 3 Chips according to BaTiO 3 / CoFe 2 o 4 / BaTiO 3 The order of loading into the carbon grinding tool with an inner diameter of 10mm and an outer diameter of 40mm, by controlling the amount of powder in ste...

Embodiment 3

[0035] A certain amount of CoFe with a particle size of about 50nm 2 o 4 Put it into a carbon abrasive with an inner diameter of 10mm and an outer diameter of 40mm, put the abrasive into a plasma discharge sintering machine, and apply a pressure of 60MPa to compact the powder into a sheet. In this step, the abrasive CoFe 2 o 4 The amount controls the thickness of the sheet. A certain amount of BaTiO with a particle size of about 500 nm 3 Put it into a carbon abrasive with an inner diameter of 10mm and an outer diameter of 40mm, put the abrasive into a plasma discharge sintering machine, and apply a pressure of 60MPa to compact the powder into a sheet. In this step, the abrasive BaTiO 3 The amount controls the thickness of the sheet. Prepressed CoFe 2 o 4 and BaTiO 3 Chips according to BaTiO 3 / CoFe 2 o 4 / BaTiO 3 The order of loading into the carbon grinding tool with an inner diameter of 10mm and an outer diameter of 40mm, by controlling the amount of powder in ste...

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Abstract

The invention provides a preparation method of a BaTiO3 / CoFe2O4 / BaTiO3 nano multilayer composite magnetoelectric ceramic. By using cobalt ferrite with a nano size and barium titanate with a submicronsize as raw materials, a plasma discharge sintering technology is used for preparing high-density BaTiO3 / CoFe2O4 / BaTiO3 nano multilayer composite magnetoelectric ceramic. The low-temperature rapid moulding characteristic of plasma discharge sintering is used, the sintered ceramic has high density, impurity-phase generation is avoided, and coupling offset between two phases is avoided, and good magnetoelectric coupling performance and anisotropy of the ceramic can be guaranteed. The prepared ceramic has the good application prospect on information storage, an integrated circuit, a magnetic sensor, and a spin-electron device.

Description

technical field [0001] The invention belongs to the field of electronic information component materials, and more specifically relates to a preparation method of BaTiO3 / CoFe2O4 / BaTiO3 nanometer multilayer composite magnetoelectric ceramics. Background technique [0002] Multiferroic materials have both ferromagnetism and ferroelectricity, and have attractive application prospects in information storage, integrated circuits, magnetic sensors, and spintronic devices, thus arousing great interest. Among them, CoFe 2 o 4 -BaTiO 3 Composite materials have been extensively studied in the past few decades due to their simultaneous ferroelectric, ferromagnetic, and magnetoelectric coupling properties at room temperature. In 1972, the magnetoelectric coupling properties in the ferromagnetic / ferroelectric composite system were first proposed. Shortly thereafter, scientists at Philips Laboratories successfully synthesized CoFe, which has a large magnetoelectric effect at room tempe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/468C04B35/32
CPCC04B35/2666C04B35/468C04B2235/666
Inventor 柳阳
Owner HUBEI UNIV OF TECH