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Microwave composite material and preparation method thereof

A composite material and microwave technology, which is applied in the direction of magnetic materials, organic materials/organic magnetic materials, copper organic compounds, etc., can solve problems such as the inability to realize monolithic integrated circuits, low relative permeability, and large dielectric constant. , to achieve the effect of weight reduction, high relative permeability and high relative permittivity

Inactive Publication Date: 2010-09-29
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The composite material obtained by this invention is based on ceramic material, has a large dielectric constant and low relative magnetic permeability, and the obtained material is a block material, which cannot realize an integrated monolithic integrated circuit, which limits its application.

Method used

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  • Microwave composite material and preparation method thereof
  • Microwave composite material and preparation method thereof
  • Microwave composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The present embodiment is a composite film of Fe-Zn-Mn-O and porphyrin zinc grown on a substrate, wherein, there is also a layer of gold thin film between the substrate and the composite film, which is used as a buffer layer to avoid Cracking of the film or substrate caused by the difference in thermal expansion coefficient between the composite film and the substrate. The buffer layer may also be a thin film formed of tantalum, ruthenium, platinum or the like.

[0041] The preparation method of the composite membrane of the present embodiment is as follows:

[0042] (1) Take three raw materials Fe 2 o 3 , ZnO and Mn 3 o 4 , the mass ratio is 9:1:10, the purity of the raw material is higher than 98%; deionized water is added to the raw material, and the raw material is put into a ball mill to grind for 60 minutes. After drying, pre-fire at 800°C for 3 hours. and then doped with an appropriate amount of SiO 2 , ZrO 2 and CaCO 3 Put it into a ball mill and grind ...

Embodiment 2

[0049] This embodiment is a composite film of magnetic alloy NiFe nanoparticles and melamine powder. The preparation method is as follows:

[0050] (1) The magnetic alloy NiFe nanoparticles and melamine powder purchased on the market are fully stirred according to the mass ratio of 1: 8, mixed uniformly, and pre-pressed, and then in 10 -4 Sintering at 80° C. for 2 hours in a vacuum environment of Pa to obtain a mixed target.

[0051] (2) using the electron beam evaporation method to grow a 10nm gold film on the Si substrate;

[0052] (3) The mixed target material prepared in (1) was grown by electron beam evaporation method, and a 500nm composite film was grown, wherein the magnetic metal NiFe existed in the form of particles with a diameter of about 100nm.

Embodiment 3

[0054] The present embodiment is a kind of octahydroxyquinoline aluminum (Alq 3 ) and a composite film of magnetic metal powder Co. The preparation method is as follows:

[0055] (1) Thermal evaporation on a thin Cu substrate (thickness about 0.1mm) to obtain a 10nm gold film

[0056] (2) Two kinds of thin films were deposited separately by thermal evaporation method. The organic material octahydroxyquinoline aluminum (Alq 3 ) and magnetic metal powder Co were put into two crucible evaporation boats. The background vacuum is better than 3×10 -4 Under the environment of Pa, the evaporation boat containing the aluminum octahydroxyquinoline and the evaporation boat containing the metal powder Co are heated with an appropriate current at the same time, so as to realize simultaneous coating. The coating speed and film thickness are monitored in real time by a crystal oscillator film thickness tester, and the voltage applied to the evaporation boat is adjusted to control the ev...

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Abstract

The invention provides a microwave composite material which is compounded from nano magnets made of ferromagnetic materials and organic materials, wherein the nano magnets are distributed in the organic materials, the size of the nano magnets made of the ferromagnetic materials is greater than the room-temperature superparamagnetic critical dimension of the ferromagnetic materials, and the resistivity of the organic material is greater than 1 ohm. cm. The invention also correspondingly provides multiple methods for preparing the microwave composite material. The microwave composite material has the characteristics of high resistivity and high saturated magnetic intensity, has good flexibility and certain elasticity, and is beneficial to the miniaturization and portability of devices. Besides, the preparation process of the microwave composite material can be compatible with the conventional semiconductor process, and realizes the integral monolithic integrated circuit.

Description

technical field [0001] The invention belongs to the field of materials. Specifically, the invention relates to a microwave composite material of a nano-magnet and an organic material and a preparation method thereof. The microwave composite material can also be used for a micro-magnetic device (such as a microwave device) in addition to a microwave device. Thin film inductors) and giant magnetoresistance devices and other fields. Background technique [0002] The rapid development of microwave technology and communication promotes the development of microwave devices in the direction of ultra-miniaturization and planarization. Traditional microwave transmission lines, such as axes, waveguides, and microstrip lines, are not suitable for the development of high-frequency devices because they are too bulky or difficult to process. Therefore, finding new materials suitable for device miniaturization is an urgent task in material research. [0003] Electromagnetic waves pass th...

Claims

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Application Information

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IPC IPC(8): H01F1/00H01F1/42C08L27/12C07D487/22C07C251/54C07D215/00C07F1/08C07C57/12C07D207/32H01F41/14
Inventor 王文秀周文平王云鹏韩秀峰
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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