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Ferrite-based ceramic composite material as well as preparation method and application thereof

A technology of ceramic composite materials and ferrite materials, applied in the field of magnetic composite materials

Active Publication Date: 2012-03-28
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, up to now, there are few studies and reports on ferrite materials, ceramic materials and carbon nanotube composites. As a new material integrating structure and function, we will explore and study it in order to discover its performance characteristics and improve its structure, which will have important research value in the research of new materials and their applications

Method used

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  • Ferrite-based ceramic composite material as well as preparation method and application thereof
  • Ferrite-based ceramic composite material as well as preparation method and application thereof
  • Ferrite-based ceramic composite material as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0059] In this embodiment, the ferrite-based ceramic composite material is composed of ferrite, carbon nanotubes and alumina, and the ferrite and alumina are coated on the tube wall of the carbon nanotubes, and its chemical expression is: 1% CNTs -Ni 0.5 Zn 0.5 Fe 2 o 4 -10%Al 2 o 3 , where 1% represents the mass percentage of CNTs in the total mass of ferrite-based ceramic composites, and 10% represents Al 2 o 3 The mass percentage of the total mass of the ferrite-based ceramic composite material.

[0060] The 1%CNTs-Ni 0.5 Zn 0.5 Fe 2 o 4 -10%Al 2 o 3 The concrete preparation method of composite material is as follows:

[0061] (1) Weigh 0.5g of carbon nanotubes and 200ml of concentrated nitric acid and mix them, reflux for 5h in an oil bath at 150°C to prepare modified carbon nanotubes, and then dissolve the modified carbon nanotubes in sodium lignosulfonate In the supersaturated solution, ultrasonic crushing for 45 minutes to obtain a uniformly dispersed carb...

Embodiment 2

[0077] In this embodiment, the ferrite-based ceramic composite material is composed of ferrite, carbon nanotubes and aluminum nitride (AlN), and the ferrite and aluminum nitride are coated on the tube wall of the carbon nanotubes. The chemical expression is : 5% CNTs-Ni 0.5 Zn 0.5 Fe 2 o 4 -20% AlN,

[0078] Wherein 5% means that CNTs accounts for the mass percentage of the total mass of the ferrite-based ceramic composite material, and 20% means that AlN accounts for the mass percentage of the total mass of the ferrite-based ceramic composite material.

[0079] The 5%CNTs-Ni 0.5 Zn 0.5 Fe 2 o 4 The specific preparation method of -20% AlN composite material is as follows:

[0080] (1) Weigh 0.5g of carbon nanotubes and 200ml of concentrated nitric acid and mix them, reflux for 5h in an oil bath at 150°C to prepare modified carbon nanotubes, and then dissolve the modified carbon nanotubes in sodium lignosulfonate In the supersaturated solution, ultrasonic crushing for ...

Embodiment 3～9

[0094] Same as Example 1, in Examples 3-9, the ferrite-based ceramic composite material is also composed of ferrite, carbon nanotubes and alumina, and the ferrite and alumina are coated on the tube wall of the carbon nanotubes, The chemical expressions thereof are shown in Table 1 below, respectively.

[0095] The preparation methods of the ferrite-based ceramic composite materials in Examples 3-9 are basically the same as in Example 1, except that the sintering temperature and holding time are different values, as shown in Table 1 below.

[0096] Chemical expression and preparation conditions of ferrite-based ceramic composite material in table 1 embodiment 3~9

[0097] Example

chemical expression

Sintering temperature

Holding time

3

5%CNTs-NiFe 2 o 4 -5%Al 2 o 3

800

1

4

2%CNTs-ZnFe 2 o 4 -10%Al 2 o 3

1000

1

5

10%CNTs-Ni 0.25 Zn 0.5 Cu 0.25 Fe 2 o 4 -15%Al 2 o 3 ...

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Abstract

The invention discloses a ferrite-based ceramic composite material as well as a preparation method and application thereof. The composite material is composed of ferrite, a carbon nanotube and a ceramic material, wherein the ferrite and the ceramic material are cladded on the tube wall of the carbon nanotube, and the ceramic material is one or several kinds of aluminum oxide, aluminum nitride, and silicon nitride. The three phases of materials, namely, the ferrite, the carbon nanotube and the ceramic, are compounded to make the advantages and disadvantages of all phases of materials complementary, so that the electrical conductance of the composite material is increased, the impedance matching performance of the composite material is improved, the wave absorption performance of the composite material is made adjustable, the structure and function integration of the ferrite-based ceramic material is realized, and thus, the application range of the composite material in the high-tech field is expanded. In addition, the powder of the composite material is prepared by adopting a coprecipitation hydrothermal method and is further prepared into a block material by adopting a microwave sintering method, and the ferrite-based ceramic composite material has the advantages that all phases are dispersed uniformly, the densification degree of the sintered material is high, the production cost is low, and the large-scale industrialization is easy to realize.

Description

technical field [0001] The invention relates to the technical field of magnetic composite materials, in particular to a ferrite-based ceramic composite material, its preparation method and application. Background technique [0002] With the advancement of science and technology, miniaturization, integration and multi-function have become the main development trends of various equipment and devices, so higher requirements are put forward for the materials that constitute equipment and devices. On the one hand, the performance of materials is put forward. On the other hand, it also requires materials to have certain structures and functions. Therefore, structural and functional integrated materials are an important development direction of new material development, and become the key to expand the application of new materials in high-tech fields, and have attracted extensive attention from domestic and foreign researchers and industries. [0003] The performance of the integr...

Claims

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Application Information

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IPC IPC(8): C04B35/26C04B35/622
Inventor 黄庆周小兵胡春峰
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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