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

Microwave-tuned composite ceramic material and preparation method thereof

A composite ceramic and microwave technology, which is applied in the field of microwave ceramic materials, can solve the problems of high dielectric constant of barium zirconate titanate, high microwave dielectric loss, and difficult circuit matching, and achieves non-toxic side effects, environmental protection and side effects, and light weight Effect

Inactive Publication Date: 2010-06-09
HUAZHONG UNIV OF SCI & TECH
View PDF0 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The dielectric constant of barium zirconate titanate is too high, and the microwave dielectric loss is high, so the material needs to be improved
In addition, too large a dielectric constant will lead to too large insertion loss, which is difficult to match with the circuit

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
  • Microwave-tuned composite ceramic material and preparation method thereof
  • Microwave-tuned composite ceramic material and preparation method thereof
  • Microwave-tuned composite ceramic material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1-5

[0021] powdered BaCO 3 , ZrO 2 、TiO 2 , SiO 2 and MgO as raw materials, respectively prepare BaZr according to the stoichiometric ratio x Ti 1-x o 3 (x=0.2) and Mg 2 SiO 4 , adding absolute ethanol or deionized water to the raw material, using agate balls or zirconia as the ball milling medium, after wet ball milling for 6 hours, discharging, drying, and pre-calcining the powder at 1100°C for 2 hours to obtain BaZr x Ti 1-x o 3 (x=0.2) and Mg 2 SiO 4 Powder. According to the formula in Table 1, the BaZr x Ti 1-x o 3 (x=0.2), Mg 2 SiO 4 Mix with MgO, wet ball mill for 6 hours, discharge and dry, use 5wt% polyvinyl alcohol as a binder to granulate, and press the powder under a pressure of 150MPa; Sintered at 1320°C for 3h in the atmosphere to obtain BaZr 0.2 Ti 0.8 o 3 -MgO-Mg 2 SiO 4 Composite ceramics. The fired samples are finely ground, ultrasonically cleaned, and then silver electrodes are applied, which can be used for dielectric property testing.

...

Embodiment 1

[0027] The BaZr that embodiment 1-5 formula gains x Ti 1-x o 3 -MgO-Mg 2 SiO 4 XRD spectrum of composite ceramics. Composite ceramic materials made of BaZr x Ti 1-x o 3 (x=0.2), MgO and Mg 2SiO 4 Three-phase composition. Embodiment 1,3, the BaZr that 5 formulas gain x Ti 1-x o 3 -MgO-Mg 2 SiO 4 The relationship between dielectric constant and dielectric loss of composite ceramics and temperature is as follows: figure 2 shown. The BaZr that embodiment 1-5 formula gains x Ti 1-x o 3 -MgO-Mg 2 SiO 4 The tuning rate of composite ceramics under different DC electric field strengths is as follows: image 3 shown. Reduced MgO content, BaZr x Ti 1-x o 3 -MgO-Mg 2 SiO 4 The dielectric constant of composite ceramics decreases, but Mg 2 SiO 4 The tuning rate increases when the content exceeds 30wt%. This provides a way to lower the dielectric constant of the material while increasing the tuning rate of the material. In the prior art, the reduction of the d...

example 6

[0028] Example 6: x=0.1, BaZr x Ti 1-x o 3 The mass percentage is 30%, Mg 2 SiO 4 The mass percent content in the mixture is 1%;

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 microwave-tuned composite ceramic material and a preparation method thereof. The composite ceramic material consists of BaZrxTi1-xO3 and a mixture, wherein the BaZrxTi1-xO3 is 30 to 95 weight percent, and x is equal to 0.1 to 0.50; and the mixture consists of Mg2SiO4 and MgO, wherein the Mg2SiO4 in the mixture is 1 to 99 weight percent. The preparation method for the microwave-tuned composite ceramic material comprises the following steps: based on the stoichiometric proportion, preparing the BaZrxTi1-xO3 and the Mg2SiO4 respectively; obtaining the powder of the BaZrxTi1-xO3 and the powder of the Mg2SiO4 respectively by ball-milling, discharging, drying and presintering; doping the Mg2SiO4 and the MgO into the BZT powder according to the component design; and performing ball-milling, drying, pelleting, molding, batching out, then sintering at the furnace temperature if between 1,200 and 1,400 DEG C for 2 to 4 hours, and obtaining the needed material. The microwave-tuned composite ceramic material has the characteristics of proper dielectric constant, low dielectric loss, high tuning rate, and high performance and low sintering temperature. The microwave-tuned composite ceramic material can be applied to a phase shifter, an adjustable filter, a delay line, an oscillator, a resonator, a phased-array antenna, and other microwave devices.

Description

technical field [0001] The invention belongs to microwave ceramic material technology, in particular to a BaZr x Ti 1-x o 3 -MgO-Mg 2 SiO 4 Microwave tuning composite ceramic material and preparation method thereof. Background technique [0002] Microwave devices such as tunable filters, delay lines, phase shifters, oscillators, resonators and phased array antennas are important devices in the field of microwave communications, but their high cost limits their wide commercial application. Low-cost tuning technology will revolutionize the microwave components and antenna industry. [0003] The dielectric constant of microwave tuning materials can change with the applied voltage. Applied in the field of microwave communication, the operating frequency of the component can be changed by applying an external voltage, such as a filter that can produce frequency hopping, which is very important for future broadband communication, because it can enable several users to transm...

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): C04B35/20C04B35/465C04B35/64
Inventor 徐业彬刘婷何艳艳
Owner HUAZHONG UNIV OF SCI & TECH
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