Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Cordierite microwave dielectric ceramic material and preparation method thereof

A technology of microwave dielectric ceramics and ceramic materials, which is applied in the field of electronic ceramic materials, can solve the problems of small increase in the temperature coefficient of resonance frequency, unstable influence of material temperature, and small increase in quality factor, etc., to improve signal transmission speed and high quality. factor, the effect of reducing loss

Inactive Publication Date: 2020-07-17
UNIV OF ELECTRONICS SCI & TECH OF CHINA
View PDF4 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Journal of Alloys and Compounds 689(2016) 81-86 reported that the use of calcium titanate for doping modification in cordierite ceramic materials has improved the performance to a certain extent. Its dielectric constant is 7.2, Q×f value is 55490GHz, and the resonance The frequency temperature coefficient is -28.3ppm / ℃. Although the Q×f value and the resonant frequency temperature coefficient have improved, the resonant frequency temperature coefficient has not improved much. In actual use, the material is greatly affected by temperature and is very unstable.
The Chinese patent application number 201410519765.6 announced the addition of TiO 2 By adjusting the frequency temperature coefficient of cordierite ceramics, the microwave dielectric properties of ceramics are improved: the dielectric constant is 6.0-8.0, the resonant frequency temperature coefficient is -0.2ppm / ℃, and the Q×f value is 37800GHz, which is difficult to meet the requirements of low loss
The above method can improve the microwave performance of cordierite to a certain extent, but the quality factor is not greatly improved, and the loss of the manufactured device is too high

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Cordierite microwave dielectric ceramic material and preparation method thereof
  • Cordierite microwave dielectric ceramic material and preparation method thereof
  • Cordierite microwave dielectric ceramic material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0022] A method for preparing a cordierite microwave dielectric ceramic material, characterized in that it comprises the following steps:

[0023] The first step: according to the MgO and Al in Table 1 2 o 3 , SiO 2 Calculate the actual amount of the mass percentage, weigh, mix, and ball mill in deionized water for 6 to 8 hours; the powder after ball milling is dried and passed through a 120 mesh sieve, and the obtained dry powder is placed in a crucible and ground at 1100 Pre-fire at a temperature of ~1200°C for 2-3 hours to obtain pre-fired material;

[0024] Second step: calculate ZrO by mass percentage in Table 1 2 、TiO 2 After weighing the material, add it to the calcined material obtained in the first step, ball mill for 5-8 hours, after drying, add the binder PVA for granulation, dry press molding under the pressure of 30MPa, and the obtained embryo The body is sintered at 1350-1450° C. for 2-3 hours to obtain a cordierite microwave dielectric ceramic material. Pe...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
resonant frequency temperature coefficientaaaaaaaaaa
resonant frequency temperature coefficientaaaaaaaaaa
quality factoraaaaaaaaaa
Login to View More

Abstract

The invention discloses a cordierite microwave dielectric ceramic material and a preparation method thereof, and belongs to the technical field of electronic ceramic materials. The ceramic material comprises the components in percentage by mass: 13 to 18 wt% of MgO, 28 to 37 wt% of Al2O3, 45 to 55 wt% of SiO2, 0 to 10 wt% of TiO2 and 0 to 5 wt% of ZrO2. The method is simple in process and low in raw material cost; the obtained microwave dielectric ceramic material has excellent properties of low dielectric constant and high quality factor, the dielectric constant is 4-6, the quality factor Q*fvalue is 60000-90000 GHz, the loss is reduced, and the signal transmission speed is increased; and the frequency temperature coefficient is less than + / -15 ppm / DEG C, so that the temperature stability is improved.

Description

technical field [0001] The invention belongs to the technical field of electronic ceramic materials, and in particular relates to a cordierite microwave dielectric ceramic material and a preparation method thereof. Background technique [0002] In recent years, communication technologies such as 5G communication and wireless local area network have developed rapidly, and new requirements have been put forward for the transmission efficiency and dielectric loss of materials used. Microwave circuits in communication technology usually contain electronic components such as dielectric resonators, resonators, filters, etc. The basic materials of these electronic components are microwave dielectric ceramics. In order to meet the development needs of miniaturization and low power consumption of communication technology, microwave dielectric ceramics must have high quality factor and low dielectric constant. [0003] Microwave ceramic materials with low dielectric constant are wide...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/195C04B35/622
CPCC04B35/195C04B35/622C04B2235/3232C04B2235/3244C04B2235/6567
Inventor 周晓华彭昶唐斌
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com