Silicon-based low-dielectric microwave dielectric ceramic and preparation method thereof

A microwave dielectric ceramic and silicon-based technology, applied in the field of microwave dielectric ceramics, can solve the problems of increased system loss and heat generation, and poor system stability, and achieve the effects of stable performance, low dielectric constant, and excellent quality factor.

Active Publication Date: 2021-06-22
WENZHOU ADVANCED MFG TECH INST OF HUAZHONG UNIV OF SCI & TECH
View PDF13 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the operating frequency of communication equipment continues to increase, the signal delay phenomenon will become more obvious, the system loss and heat will also increase, and the system stability will gradually deteriorate

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
  • Silicon-based low-dielectric microwave dielectric ceramic and preparation method thereof
  • Silicon-based low-dielectric microwave dielectric ceramic and preparation method thereof
  • Silicon-based low-dielectric microwave dielectric ceramic and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5

[0035] A microwave dielectric ceramic, its preparation method is carried out according to the following steps:

[0036] (1) Analytical pure BaCO 3 , CaCO 3 , SrCO 3 and SiO 2 After mixing according to the stoichiometric ratio, use zirconium balls as the medium and deionized water as the dispersant, and use a ball mill to mix and stir the powder for 5 hours at a speed of 360r / min; dry the obtained slurry at 1050°C Pre-fired for 5 hours to obtain a pre-fired ceramic powder;

[0037] (2) The pre-fired ceramic powder obtained in step (1) is subjected to wet ball milling again, the dispersant is deionized water, and after drying, 8 wt% polyvinyl alcohol (PVA) binder is added to the dried powder Granulate, and press it into a cylindrical green sample with a thickness-to-diameter ratio of 0.4 to 0.6 under a pressure of 150 MPa; after tableting, sinter in air at 1150°C to 1250°C for 5 hours to obtain the Microwave dielectric ceramics.

[0038] Table 1 Examples 1-5, sintering tem...

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
quality factoraaaaaaaaaa
Login to view more

Abstract

The invention belongs to the technical field of microwave dielectric ceramics, and particularly relates to a silicon-based low-dielectric microwave dielectric ceramic and a preparation method thereof. The preparation method comprises the following steps: a compound with a chemical general formula of xBaO-yMO-zSiO2 (M = Ca, Sr; 0 <x<=1.0; 1.0 <= y <=2.0; 1.0 <= z <= 3.0) is used for preparing a microwave dielectric ceramic material. The ceramic has a low dielectric constant (epsilon r = 7.3-11.0), an excellent quality factor (Q * f = 5370-40500 GHz) and a wide sintering temperature range (1150-1250 DEG C), meanwhile, the microwave dielectric ceramic has a negative temperature coefficient of resonance frequency (-76.6 ppm/DEG C<=tau f <=-36.3 ppm/DEG C). Due to the low sintering temperature and the excellent quality factor of the microwave dielectric ceramic, the silicon-based low dielectric microwave dielectric material can be applied to the field of BME-MLCC.

Description

technical field [0001] The invention belongs to the technical field of microwave dielectric ceramics, and more specifically relates to a silicon-based low dielectric microwave dielectric ceramic and a preparation method thereof. Background technique [0002] Microwave dielectric ceramics refer to ceramic materials used as dielectrics in microwave frequency band (300MHz-300GHz) circuits. As the operating frequency of communication equipment continues to increase, the signal delay phenomenon will become more obvious, the system loss and heat will also increase, and the system stability will gradually deteriorate. The low dielectric constant can reduce the interaction coupling loss between the material and the electrode, and can increase the transmission rate of the electrical signal, and the excellent quality factor can reduce the system loss and improve the frequency selection characteristics of the material. Considering factors such as environmental friendliness and low cos...

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): C04B35/16C04B35/22C04B35/622
CPCC04B35/16C04B35/22C04B35/622C04B2235/3208C04B2235/3213C04B2235/3215C04B2235/3418C04B2235/656C04B2235/6567C04B2235/602C04B2235/6583
Inventor 雷文杜康吕文中付明宋小强王飞
Owner WENZHOU ADVANCED MFG TECH INST OF HUAZHONG UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap