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

(SrCa)TiO3-LaAlO3-based microwave dielectric ceramic material and preparation method thereof

A technology of microwave dielectric ceramics and base materials, which is applied in the field of high quality factor microwave dielectric ceramic materials and microwave dielectric ceramic materials. It can solve the problems of microwave dielectric ceramic performance deterioration, high sintering temperature requirements, and microwave performance deterioration. Improvement, stable performance, and excellent microwave dielectric properties

Inactive Publication Date: 2014-02-26
UNIV OF ELECTRONIC SCI & TECH OF CHINA
View PDF0 Cites 22 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In 2001, Huang CL et al. published "Increasing 0.5SrTiO at low sintering temperature" on "Materials Research Bulletin". 3 -0.5LaAlO 3 Quality Factor of Microwave Ceramics (Improved high Q value of0.5LaA1O 3 -0.5SrTiO 3 Microwave dielectric ceramics at low sintering), when mixed with 0.25%-1%wt of B 2 o 3 , 0.5LaAlO 3 -0.5SrTiO 3 The sintering temperature of the ceramic is reduced to 1430°C, but its dielectric properties are relatively poor, and the addition of a large amount of glass phase leads to the deterioration of microwave properties.
Through XPS analysis, it is concluded that the reason for this phenomenon is that SrTiO 3 -LaAlO 3 Ceramics will be semiconducted, and the mechanism is Ti 4+ → Ti 3+ , resulting in oxygen vacancies, resulting in poor performance of microwave dielectric ceramics
Ceramics with high-quality microwave dielectric properties can be used in O 2 obtained by sintering in an atmosphere, but the required conditions increase the requirements for sintering equipment and higher sintering temperature, which makes the popularization of practical ceramics encounter great resistance

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
  • (SrCa)TiO3-LaAlO3-based microwave dielectric ceramic material and preparation method thereof
  • (SrCa)TiO3-LaAlO3-based microwave dielectric ceramic material and preparation method thereof
  • (SrCa)TiO3-LaAlO3-based microwave dielectric ceramic material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～10

[0028] The concrete implementation steps that make these embodiment microwave dielectric ceramics are as follows:

[0029] (1) Synthesis of base material: SrCO with purity ≥ 99% 3 , CaCO 3 , La 2 o 3 、Al 2 o 3 and TiO 2 As a raw material, according to the chemical composition formula (1-x)Sr (1-y) Ca y TiO 3 -xLaAlO 3 (wherein 0.40≤x≤0.50, 0.05≤y≤0.20) molar ratio is carried out batching, and specific formula is shown in Table 1; Put the above-mentioned mixed material into the nylon ball mill jar, and use zirconium ball as grinding ball, in the past Ionized water is used as the ball milling medium, the ratio of the added material to the zirconium ball is 1:5, and the ball milling time is 5 to 8 hours. After the ball milling, the slurry is taken out and dried at 100°C and passed through a 60-mesh sieve to obtain Primary ball grinding material, pre-calcining the primary ball grinding material at a temperature of 1250 ° C to 1350 ° C for 3 to 5 hours to obtain a pre-fir...

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

No PUM Login to View More

Abstract

The invention discloses a (SrCa)TiO3-LaAlO3-based microwave dielectric ceramic material and a preparation method thereof and belongs to the technical field of electronic information functional materials. The (SrCa)TiO3-LaAlO3-based microwave dielectric ceramic material comprises a base material and additives. The base material is (1-x)Sr(1-y)CayTiO3-xLaAlO3, x is greater than or equal to 0.40 and is less than or equal to 0.50 and y is greater than or equal to 0.05 and is less than or equal to 0.20. The additives comprise B2O3, Co2O3, MnO and CeO2. A main crystalline phase formed from the base material is a composite perovskite SrTiO3-LaAlO3 phase. A sintering temperature in air is in a range of 1530-1580 DEG C. A Q*f value is in a range of 45000-55000GHz. A relative dielectric constant is in a range of 35-43. A resonant frequency temperature coefficient is + / -10ppm / DEG C. The (SrCa)TiO3-LaAlO3-based microwave dielectric ceramic material is prepared by the traditional solid-phase ceramic synthesis technology, has the advantages of cheap raw materials, environmental friendliness and low cost, and is convenient for batch production and application popularization.

Description

technical field [0001] The invention belongs to the technical field of electronic information functional materials, and relates to microwave dielectric ceramic materials, in particular to microwave dielectrics with high quality factor that can be used to make microwave communication components such as dielectric resonators, dielectric filters, dielectric substrates, and dielectric antennas in modern communication technology. Ceramic material. Background technique [0002] In recent years, with the rapid development of microwave communication technology, microwave dielectric ceramics are more and more widely used in circuits, such as resonators, filters, dielectric antennas, microwave integrated circuit substrates and other components made of microwave dielectric materials. Widely used in mobile communication, satellite communication, global satellite positioning system (GPS) and other communication equipment. As a result, higher requirements are put forward for the performa...

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
IPC IPC(8): C04B35/47C04B35/50C04B35/622
Inventor 唐斌李颖翔周晓华钟朝位张树人
Owner UNIV OF ELECTRONIC 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