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Application of MgF2 ceramic material as ultralow dielectric microwave dielectric ceramic

A technology of microwave dielectric ceramics and ceramic materials, which is applied in the field of electronic information materials and their devices, can solve problems such as difficulty in realizing FR4 replacement, and achieve the effects of stable and single phase, good repeatability and simple preparation process

Active Publication Date: 2022-03-01
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The dielectric constant of these fluoride ceramics is still relatively large compared with FR4, and it is difficult to achieve a good FR4 replacement

Method used

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  • Application of MgF2 ceramic material as ultralow dielectric microwave dielectric ceramic
  • Application of MgF2 ceramic material as ultralow dielectric microwave dielectric ceramic
  • Application of MgF2 ceramic material as ultralow dielectric microwave dielectric ceramic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] a MgF 2 Ceramic material, prepared by the following steps:

[0032] Buy MgF with a purity of 99.99% on the market 2 High-purity raw materials.

[0033] Ball milling: MgF 2 The high-purity raw materials, ball milling beads, and absolute ethanol are placed in a ball mill tank at a mass ratio of 1:6:3, and wet ball milled at 180r / min for more than 12 hours to obtain a slurry-like raw material.

[0034] Drying and sieving: Put the prepared muddy raw material into an oven and dry to constant weight. After drying, pass the raw material through a 200-mesh sieve to obtain uniform and fine MgF 2 powder.

[0035] Granulation and tableting: to MgF 2 Add 4wt% polyvinyl alcohol solution to the powder, grind it evenly and pass it through a 40-mesh sieve, take the sieved material and place it in a mold to press it into a cylindrical green body.

[0036] Sintering: Raise the temperature of the obtained cylindrical green body to 600°C at a rate of 10°C / min, and keep it warm for 1h t...

Embodiment 2

[0039] This embodiment is basically the same as Embodiment 1, and its difference only lies in:

[0040] In the sintering step: heat up to 1125° C. for 3 hours at a rate of 5° C. / min.

Embodiment 3

[0042] This embodiment is basically the same as Embodiment 1, and its difference only lies in:

[0043] In the sintering step: heat up to 1150° C. for 3 hours at a rate of 5° C. / min.

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Abstract

The invention relates to the technical field of electronic information materials and devices thereof, in particular to application of a MgF2 ceramic material as ultralow dielectric microwave dielectric ceramic. The invention provides an application thought of using the MgF2 ceramic material as microwave dielectric ceramic, the MgF2 ceramic material has high thermal conductivity and ultralow dielectric constant (4.60-4.70) at the same time, and the problems that a ceramic-based material in an existing microwave dielectric is high in dielectric constant and polymer-based FR4 is low in thermal conductivity are solved. The dielectric constant of the MgF2 ceramic material is close to that of a commercial polymer-based FR4 plate, and the MgF2 ceramic material has ultra-low dielectric loss (Qf = 85983-103086 GHz) which is incomparable to that of the FR4 plate, and has a very important application prospect in the field of millimeter wave communication in the future.

Description

technical field [0001] The invention relates to the technical field of electronic information materials and devices thereof, in particular to a MgF 2 Application of ceramic materials as ultra-low dielectric microwave dielectric ceramics. Background technique [0002] Microwave dielectric ceramics refer to low-loss dielectric ceramics that are used as dielectric materials in microwave frequency (300MHz–300GHz) circuits and perform one or more functions. [0003] In recent decades, with the rapid development of wireless communication technology, microwave dielectric ceramics have attracted widespread attention as key materials for passive devices (including resonators, filters, antennas, etc.) in microwave communication systems. In addition, with the continuous improvement of people's requirements for information transmission content, speed and quality, a new generation of information technology such as 5G mobile communication, Internet of Things (IoT) technology is emerging,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/553C04B35/622C04B35/64C04B35/634
CPCC04B35/553C04B35/622C04B35/64C04B35/63416C04B2235/6562C04B2235/6567C04B2235/96
Inventor 刘兵周梦飞沙柯黄玉辉宋开新
Owner HANGZHOU DIANZI UNIV