Multiferroic composite material with magneto-dielectric effect and preparation method thereof

A multiferroic and electric effect technology, applied in the field of ceramic compositions, achieves the effects of stable performance, simple preparation process, and wide application fields

Inactive Publication Date: 2012-12-19
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The multiferroic composite ceramic material involved in the present invention is proposed for the first time, and there are no related reports at home and abroad

Method used

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  • Multiferroic composite material with magneto-dielectric effect and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0023] (1) Na 2 CO 3 and Nb 2 o 5 , NiO and Fe 2 o 3 According to the stoichiometric formula NaNbO 3 and NiFe 2 o 4 Dosing, NaNbO 3 and NiFe 2 o 4 The molar ratio is 1:1, put 14g of mixed powder into the polyester tank, and add the material: deionized water: zirconium balls into the polyester tank in the ratio of 1:1:1.5 mass ratio, in the planetary Ball milling on the ball mill for 4 hours, the speed of the ball mill is 1000 rpm;

[0024] (2) Place the ball-milled raw materials in a drying oven, dry them at 120°C, and pass them through a 40-mesh sieve;

[0025] (3) Put the dried and sieved powder into a medium-temperature furnace, pre-fire at 900°C, and keep it warm for 4 hours;

[0026] (4) The pre-burned powder is added with a paraffin wax binder with a mass percentage of 8% for granulation. After passing through an 80-mesh sieve, use a powder tablet press to compress the powder into a diameter of 20mm under a pressure of 4MPa. A green body with a thickness of ...

Embodiment 2

[0030] (1) Na 2 CO 3 and Nb 2 o 5 , NiO and Fe 2 o 3 According to the stoichiometric formula NaNbO 3 and NiFe 2 o 4 Dosing, NaNbO 3 and NiFe 2 o 4 The molar ratio is 1:1, put 14g of mixed powder into the polyester tank, and add the material: deionized water: zirconium balls into the polyester tank in the ratio of 1:1:1.5 mass ratio, in the planetary Ball milling on the ball mill for 12 hours; the rotating speed is 1000 rpm;

[0031] (2) Place the ball-milled raw materials in a drying oven, dry them at 100°C, and pass them through a 40-mesh sieve;

[0032] (3) Put the dried and sieved powder into a medium-temperature furnace, pre-burn it at 1150°C, and keep it warm for 4 hours;

[0033] (4) The pre-burned powder is added with a paraffin wax binder with a mass percentage of 8% for granulation. After passing through an 80-mesh sieve, use a powder tablet press to compress the powder into a diameter of 20mm under a pressure of 4MPa. A green body with a thickness of 5 m...

Embodiment 3

[0037] (1) Na 2 CO 3 and Nb 2 o 5 , NiO and Fe 2 o 3 According to the stoichiometric formula NaNbO 3 and NiFe 2 o 4 Dosing, NaNbO 3 and NiFe 2 o 4 The molar ratio is 1:1, put 14g of mixed powder into the polyester tank, and add the material: deionized water: zirconium balls into the polyester tank in the ratio of 1:1:1.5 mass ratio, in the planetary Ball milling on the ball mill for 24 hours; the speed is 1000 rpm;

[0038] (2) The raw materials after ball milling are placed in a drying oven, dried at 120°C, and then passed through a 40-mesh sieve;

[0039] (3) Put the dried and sieved powder into a medium-temperature furnace, pre-fire it at 1100°C, and keep it warm for 6 hours;

[0040] (4) The pre-burned powder is added with a paraffin wax binder with a mass percentage of 8% for granulation. After passing through an 80-mesh sieve, use a powder tablet press to compress the powder into a diameter of 20mm under a pressure of 4MPa. A green body with a thickness of 5...

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Abstract

The invention discloses a multiferroic composite ceramic material with a magneto-dielectric effect, the chemical formula of the material is NaNbO3-NiFe2O4, and the molar ratio is 1:1. The material is prepared by taking Na2CO3, Nb2O5, NiO and Fe2O3 as raw materials through adopting a solid phase method, carrying out material preparing and ball milling on the raw materials, burning an obtained object at a temperature of 900-1150 DEG C, carrying out compression moulding on the obtained object, and sintering the obtained object at a temperature of 1100-1200 DEG C. The multiferroic composite ceramic material disclosed by the invention has the advantages of good uniformity, small roughness, no micro-crack, stable performance, good electrical properties, magnetic properties, magneto-dielectric effect, and the like, and can be used for manufacturing integrated multifunctional magnetic / electrical parts; and the multiferroic composite ceramic material is simple in preparation process, non-toxic, small in pollution, and wide in application range.

Description

technical field [0001] The invention belongs to a ceramic composition characterized by components, in particular to a lead-free multiferroic particle composite ceramic material with magnetodielectric coupling effect and a preparation method thereof. Background technique [0002] With the advancement of science and technology, the requirements for miniaturization and integration of devices are getting higher and higher, so it is of great value to develop new materials with two or more functions. Multiferroic materials have attracted much attention because they have both magnetic and electrical properties and are coupled to each other, and have a wide range of applications in the field of sensor or transducer preparation. The magnetodielectric effect, like the electronic ferroelectricity and magnetoelectricity effect, is an important physical property of multiferroic materials. Magneto-dielectric effect MDE (Magneto-dielectric Effect) is defined as: a multiferroic material pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26C04B35/622
Inventor 李玲霞韩叶梅夏往所任翔
Owner TIANJIN UNIV
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