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A low-loss high-frequency magnetic dielectric material and its preparation method

A low-loss, magnetic-dielectric technology, applied in the structural form of the radiating element, can solve the problems of large magnetic loss, failure to achieve low-loss antenna substrate performance, low application frequency, etc., to reduce magnetic-dielectric loss, achieve miniaturization, Small size effect

Active Publication Date: 2022-05-03
成都齐兴真空镀膜技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In 2017, Li Qiang and others applied for a Chinese invention patent "A Magnesium Ferrite-Based Magnetic Material and Its Preparation Method" (authorized publication number: CN106587976B), which prepared Cd-doped Mg ferrite by traditional solid-state sintering method materials, achieve equal magnetic properties, but the magnetic loss is large
In the Chinese invention patent "A Magnesia-Ferrite-Based Low-Loss Magnetic Material and Its Preparation Method" (Application No.: CN201910362184.9) applied by Guo Li and others in 2019, Pr-doped Mg ferrite material is used, although Low loss characteristics are achieved, but the application frequency is low, only in the application frequency band of several hundred MHz
The Chinese invention patent "A ferrite-based composite magnetic dielectric antenna substrate material and its preparation method" (application number: CN201310275973.1) applied by Jing Yulan and others in 2013, in Ba-Sr Co 2 On the basis of Z ferrite, the iron-deficiency formula is adopted, only the magnetic properties are adjusted, and the low-loss antenna substrate performance cannot be achieved.

Method used

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  • A low-loss high-frequency magnetic dielectric material and its preparation method

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Experimental program
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Embodiment 1

[0023] A method for preparing a low-loss high-frequency magnetic dielectric material, comprising the following steps:

[0024] Step 1, with barium nitrate (Ba(NO 3 ) 2 ), cobalt nitrate (Co(NO 3 ) 2 ), ferric nitrate (Fe(NO 3 ) 3 ), praseodymium nitrate (Pr(NO 3 ) 3 ) and samarium nitrate (Sm(NO 3 ) 3 ) as raw material, according to molecular formula Ba 3 co 2 Fe 23.83 PR 0.15 SM 0.02 o 41 Ba(NO 3 ) 2 , Co(NO 3 ) 2 , Fe(NO 3 ) 3 , Pr(NO 3 ) 3 and Sm(NO 3 ) 3 The quality of raw material, the Ba(NO of weighing 7.84g 3 )2 , 5.82g of Co(NO 3 ) 2 , 57.88g of Fe(NO 3 ) 3 , 0.49g of Pr(NO 3 ) 3 and 0.07g of Sm(NO 3 ) 3 raw material;

[0025] Step 2, the Ba(NO 3 ) 2 Dissolve in 300mL deionized water, stir until completely dissolved, then add Co(NO 3 ) 3 , Fe(NO 3 ) 3 , Pr(NO 3 ) 3 and Sm(NO 3 ) 3 , stirring and dissolving in a magnetic constant temperature stirrer, the temperature is 80°C, and the time is 1h;

[0026] Step 3. Add 14.9 g of c...

Embodiment 2

[0033] The present embodiment compares with embodiment 1, difference is: the process of step 1 is: with barium nitrate (Ba(NO 3 ) 2 ), cobalt nitrate (Co(NO 3 ) 2 ), ferric nitrate (Fe(NO 3 ) 3 ), praseodymium nitrate (Pr(NO 3 ) 3 ) and samarium nitrate (Sm(NO 3 ) 3 ) as raw material, according to molecular formula Ba 3 co 2 Fe 23.79 PR 0.15 SM 0.06 o 41 Ba(NO 3 ) 2 , Co(NO 3 ) 2 , Fe(NO 3 ) 3 , Pr(NO 3 ) 3 and Sm(NO 3 ) 3 The quality of raw material, the Ba(NO of weighing 7.84g 3 ) 2 , 5.82g of Co(NO 3 ) 2 , 57.78g of Fe(NO 3 ) 3 , 0.49g of Pr(NO 3 ) 3 and 0.20g of Sm(NO 3 ) 3 raw material;

[0034] The magnetic permeability and permittivity of the magnetic dielectric material that embodiment 2 obtains are as follows:

[0035] frequency 1MHz 100MHz 200MHz 500MHz 800MHz 1.5GHz 1.8GHz Permeability / μ 12.54 12.55 12.56 12.56 12.59 12.61 12.60 Magnetic loss / tanδ 0.039 0.039 0.038 0.041 0.042 0.041 0....

Embodiment 3

[0037] The present embodiment compares with embodiment 1, difference is: the process of step 1 is: with barium nitrate (Ba(NO 3 ) 2 ), cobalt nitrate (Co(NO 3 ) 2 ), ferric nitrate (Fe(NO 3 ) 3 ), praseodymium nitrate (Pr(NO 3 ) 3 ) and samarium nitrate (Sm(NO 3 ) 3 ) as raw material, according to molecular formula Ba 3 co 2 Fe 23.75 PR 0.15 SM 0.10 o 41 Ba(NO 3 ) 2 , Co(NO 3 ) 2 , Fe(NO 3 ) 3 , Pr(NO 3 ) 3 and Sm(NO 3 ) 3 The quality of raw material, the Ba(NO of weighing 7.84g 3 ) 2 , 5.82g of Co(NO 3 ) 2 , 57.68g of Fe(NO 3 ) 3 , 0.49g of Pr(NO 3 ) 3 and 0.33g of Sm(NO 3 ) 3 raw material;

[0038] The magnetic permeability and permittivity of the magnetic dielectric material that embodiment 3 obtains are as follows:

[0039] frequency 1MHz 100MHz 200MHz 500MHz 800MHz 1.5GHz 1.8GHz Permeability / μ 11.03 11.03 11.03 11.06 11.13 11.09 11.09 Magnetic loss / tanδ 0.040 0.040 0.050 0.050 0.050 0.050 0....

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Abstract

A low-loss high-frequency magnetic dielectric material belongs to the field of electronic materials. The magnetic dielectric material is Ba 3 co 2 Fe 24‑x‑y PR x SM y o 41 Hexagonal ferrite; x=0.05-0.30, y=0.01-0.10. The low-loss high-frequency magnetic dielectric material of the present invention is prepared by a sol-gel method, which realizes low loss and high-frequency magnetic dielectric properties, and has low loss and near-equal magnetic dielectric properties (its magnetic permeability) in the frequency range of 1 MHz to 1.8 GHz. and the dielectric constant are about 5 to 15, and the magnetic loss coefficient and dielectric loss coefficient in the frequency band are both lower than 0.005); when the low-loss high-frequency magnetic dielectric material is used as the antenna substrate, it can well realize the miniaturization of the antenna And high frequency, and it is beneficial to improve the transmission efficiency of the microstrip antenna, reduce the transmission loss of the antenna, and provide a new material for the design of high frequency and integrated small-size wireless communication equipment.

Description

technical field [0001] The invention belongs to the field of electronic materials, and in particular relates to a low-loss high-frequency magnetic dielectric material and a preparation method thereof. Background technique [0002] In the process of electronic communication and space transmission, antenna is an essential part. In order to improve the transmission characteristics, traditional antennas are generally large in size, which is not conducive to the current needs and development directions of integration and miniaturization. Therefore, in the research of the antenna, on the one hand, the transmission characteristics of the antenna are improved from the circuit design, and on the other hand, the size and performance of the antenna are improved from the antenna substrate material. Among them, the circuit design can increase the amount of information transmission, and the antenna substrate can improve the circuit design structure of the antenna and the size of the ante...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/32C04B35/622C04B35/64H01Q1/38
CPCC04B35/2633C04B35/2641C04B35/622C04B35/64H01Q1/38C04B2235/3215C04B2235/3224C04B2235/3275C04B2235/767C04B2235/656C04B2235/6567
Inventor 武剑李颉孙亚辉高峰苏豪凯张颖刘颖力
Owner 成都齐兴真空镀膜技术有限公司