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Magnesium ferrite-based low-loss magnetic dielectric material and preparation method thereof

A magnesium ferrite, low-loss technology, applied in the direction of magnetic materials, inorganic materials, magnetic objects, etc., can solve the problems of affecting antenna performance, high material loss, unfavorable antenna transmission efficiency, etc., to improve radiation efficiency and bandwidth, Reduced loss, low loss effect

Active Publication Date: 2019-08-02
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In 2014, Xiao Zhisong and others of Beihang University applied for a Chinese invention patent "a three-phase composite microstrip antenna substrate material and its preparation method (application number 201410326932.5)", which proposed a method using magnetic fillers and dielectric fillers and The antenna substrate material compounded by a certain amount of polymer has a simple process and controllable magnetic medium. However, because the material is a composite material, the material loss is high, which is not conducive to the transmission efficiency of the antenna.
The Chinese invention patent "A microstrip antenna organic composite substrate material and its preparation method (application number 20140431104.8)" applied by Su Hua et al. of the University of Electronic Science and Technology of China in 2014 proposed a Co 2 Z barium strontium ferrite material and polytetrafluoroethylene resin material are composited and other magnetic dielectric materials, but the polypropylene resin organic matter used in the magnetic dielectric material is greatly affected by temperature in practical applications, which seriously affects the performance of the antenna. performance

Method used

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  • Magnesium ferrite-based low-loss magnetic dielectric material and preparation method thereof
  • Magnesium ferrite-based low-loss magnetic dielectric material and preparation method thereof
  • Magnesium ferrite-based low-loss magnetic dielectric material and preparation method thereof

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Embodiment 1

[0023] A method for preparing a magnesium ferrite-based magnetic dielectric material, comprising the following steps:

[0024] Step 1: Magnesium oxide (MgO), cadmium oxide (CdO), praseodymium oxide (Pr 2 o 3 ) and ferric oxide (Fe 2 o 3 ) as the raw material, according to the material Mg 0.8 Cd 0.2 Fe 1.96 PR 0.04 o 4 The ratio of the metal elements in the converted mass of MgO is 3.2g, the mass of CdO is 2.57g, and the mass of Pr 2 o 3 The mass of 0.66g, Fe 2 o 3 The quality of the product is 15.65g, and it is dried after weighing, mixing, and ball milling for 16 hours;

[0025] Step 2: Sieve the primary ball-milled dry material obtained in step 1 and put it into a sintering furnace for pre-sintering at a temperature of 1000°C for 3 hours, then cool to room temperature with the furnace to obtain a pre-sintered material;

[0026] Step 3: The calcined material obtained in step 2 is subjected to secondary ball milling for 16 hours, and the average particle size of th...

Embodiment 2

[0030] A method for preparing a magnesium ferrite-based magnetic dielectric material, comprising the following steps:

[0031] Step 1: Magnesium oxide (MgO), cadmium oxide (CdO), praseodymium oxide (Pr 2 o 3 ) and ferric oxide (Fe 2 o 3 ) as the raw material, according to the material Mg 0.8 Cd 0.2 Fe 1.94 PR 0.06 o 4 The ratio of the metal elements in the converted mass of MgO is 3.2g, the mass of CdO is 2.57g, and the mass of Pr 2 o 3 The mass of 0.99g, Fe 2 o 3 The quality of the product is 15.49g, and it is dried after weighing, mixing, and ball milling for 16 hours;

[0032] Step 2: Sieve the primary ball-milled dry material obtained in step 1 and put it into a sintering furnace for pre-sintering at a temperature of 1000°C for 3 hours, then cool to room temperature with the furnace to obtain a pre-sintered material;

[0033] Step 3: The calcined material obtained in step 2 is subjected to secondary ball milling for 16 hours, and the average particle size of the ...

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Abstract

The invention discloses a magnesium ferrite-based low-loss magnetic dielectric material and belongs to the field of electronic materials. The magnetic dielectric material is prepared from magnesium ferrite as a material through praseodymium doping modification, the praseodymium-doped magnesium ferrite material is a Mg1-xCdxFe2-yPryO4 spinel ferrite material, x is 0.1-0.3, and y is 0.02-0.08. According to the magnetic dielectric material disclosed by the invention, magnetic properties and dielectric properties of the material are adjusted through modification of Pr ions, low-temperature sintering and magnetic dielectric approximate equality are achieved, uniform crystal grain growth is controlled through a material synthesis process, and the material has low magnetic consumption parametersand has equal magnetic dielectric properties and low consumption within a frequency range of 1-30MHz; when being used as an antenna base plate material, the magnetic dielectric material is capable ofwell achieving miniaturization of an antenna, the radiation efficiency and the bandwidth of a microstrip antenna can be improved, and a novel scheme is provided for designing of small-size wireless communication equipment.

Description

technical field [0001] The invention belongs to the field of electronic materials, and in particular relates to a magnesium ferrite-based low-loss magnetic dielectric material and a preparation method thereof. Background technique [0002] With the realization of large-scale practical use of 4G communication around the world, 5G technology has become the research and development focus of the global mobile communication industry. 5G not only has huge industrial value itself, but also drives the rapid development of various basic industries such as chips, devices, materials, and software. 5G will be more closely integrated with the Internet, the Internet of Things, and industrial, transportation, medical and other industry applications, thereby promoting a new wave of industrial innovation. In the construction of triple play, both network equipment and terminal equipment are inseparable from various components. The transformation and upgrading of the network and the diversif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/40H01F1/34
CPCC04B35/2641C04B2235/3284C04B2235/96H01F1/344
Inventor 郭莉李颉甘功雯杨燕王刚张怀武
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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