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

Ultralow-temperature-sintered composite microwave dielectric ceramic material and preparation method thereof

A technology of microwave dielectric ceramics and ceramic materials, applied in the field of electronic ceramics, can solve the problems of high price, high cost and difficult preparation of TeO2, achieve simple chemical composition and preparation process, adjustable resonant frequency temperature coefficient, excellent microwave dielectric. The effect of electrical properties

Active Publication Date: 2013-08-07
北京中科行运科技有限公司
View PDF3 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of the first method is that it is not easy to prepare powders with small particle sizes. Generally, wet chemical methods can be used to obtain fine powders with relatively uniform particle size distribution. This method has low efficiency and high cost.
The disadvantage of the second method is that the addition of sintering aids will often introduce impurities, which will affect the microwave dielectric properties of ceramics. However, this method is the most widely used because of its low price and simple experimental process.
But TeO 2 The price itself is very high and highly toxic, and these shortcomings limit its large-scale application in industry

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A preparation method of a composite microwave dielectric ceramic material sintered at an ultra-low temperature, comprising the following steps:

[0033] 1) The raw material Ag will be analyzed for purity 2 CO 3 、 Bi 2 o 3 、MoO 3 and WO 3 By composition (Ag 0.5 Bi 0.5 )(Mo 0.3 W 0.7 )O 4 After mixing, fully ball mill for 5 hours, dry at 200°C, pass through a 200-mesh sieve and briquette, and then heat at 550°C for 4 hours to obtain a sample briquette;

[0034] 2) After pulverizing the sample burnt block, after secondary ball milling for 5 hours, dry it at 200°C, pass through a 200-mesh sieve, and briquette it, and then heat it again at 550°C for 4 hours to obtain the second sample burnt block;

[0035] 3) After pulverizing the sintered block of the secondary sample, after fully ball milling for 5 hours, drying at 200°C and then granulating, and sieving through double-layer sieves of 60 mesh and 120 mesh to obtain the required ceramic powder. The powder is pres...

Embodiment 2

[0039] A preparation method of a composite microwave dielectric ceramic material sintered at an ultra-low temperature, comprising the following steps:

[0040] 1) The raw material Ag will be analyzed for purity 2 CO 3 、 Bi 2 o 3 、MoO 3 and WO 3 By composition (Ag 0.5 Bi 0.5 )(Mo 0.3 W 0.7 )O 4 After mixing, fully ball mill for 5 hours, dry at 200°C, pass through a 200-mesh sieve and briquette, and then heat at 550°C for 4 hours to obtain a sample briquette;

[0041] 2) After pulverizing the sample burnt block, after secondary ball milling for 5 hours, dry it at 200°C, pass through a 200-mesh sieve, and briquette it, and then heat it again at 550°C for 4 hours to obtain the second sample burnt block;

[0042] 3) After pulverizing the sintered block of the secondary sample, after fully ball milling for 5 hours, drying at 200°C and then granulating, and sieving through double-layer sieves of 60 mesh and 120 mesh to obtain the required ceramic powder. The powder is pres...

Embodiment 3

[0046] A preparation method of a composite microwave dielectric ceramic material sintered at an ultra-low temperature, comprising the following steps:

[0047] 1) The raw material Ag will be analyzed for purity 2 CO 3 、 Bi 2 o 3 、MoO 3 and WO 3 By composition (Ag 0.5 Bi 0.5 )(Mo 0.3 W 0.7 )O 4 After mixing, fully ball mill for 4 hours, dry at 180°C, pass through a 200-mesh sieve, briquette, and then heat at 500°C for 8 hours to obtain a sample briquette;

[0048] 2) After pulverizing the sample burnt block, after secondary ball milling for 4 hours, dry it at 180°C, pass through a 200-mesh sieve, press the block, and heat it at 500°C for 8 hours again to obtain the second sample burnt block;

[0049] 3) After pulverizing the sintered block of the secondary sample, after fully ball milling for 4 hours, drying at 180°C and then granulating, sifting through double-layer sieves of 60 mesh and 120 mesh to obtain the required porcelain powder, and the porcelain powder The ...

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
Resonant frequency temperature coefficientaaaaaaaaaa
Login to View More

Abstract

The invention discloses an ultralow-temperature-sintered composite microwave dielectric ceramic material and a preparation method thereof. The formula of the ceramic material is (Ag0.5Bi0.5)(MoxW1-x)O4, wherein 0.3<=x<=0.7. The ultralow-temperature-sintered composite microwave dielectric ceramic material has the characteristics of finely adjustable relative dielectric constant (32.2-34.5), favorable microwave behavior microwave dielectric ceramics (Qf=11500GHz-12000GHz), adjustable temperature coefficient of resonance frequency (-32ppm / DEG C to +19ppm / DEG C) and simple chemical composition. By adopting the solid-phase reaction sintering method, the invention is simple in technological operation, environment-friendly and suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of electronic ceramics, and relates to a microwave dielectric ceramic material and a preparation method thereof, in particular to an ultra-low temperature sintered composite microwave dielectric ceramic material and a preparation method thereof. Background technique [0002] In recent years, due to the development of microwave technology and equipment towards miniaturization, integration and civilian use, large-scale research on dielectric materials has begun internationally. With the widespread use of low temperature co-fired ceramics (Low Temperature Co-fired Ceramics, LTCC) technology in recent years, the search, preparation and research of medium and high dielectric constant (ε r >10), low loss (Qf>5000GHz), low resonant frequency temperature coefficient (TCF≈0ppm / ℃), lower sintering temperature (below the melting point of common metals such as Ag, Cu, Au and Al), low cost (no Containing or contai...

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): C04B35/495C04B35/622
Inventor 周迪庞利霞郭靖姚熹
Owner 北京中科行运科技有限公司
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