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

Ultra-low temperature sintering microwave dielectric ceramic material system, and preparation method and application thereof

A technology for microwave dielectric ceramics and ceramic materials, applied in the field of low-loss tungsten-based ultra-low temperature sintered microwave dielectric ceramic materials and their preparation, can solve the problems of difficulty in meeting industrial stability requirements, unsuitable for mass production, expensive Te, and the like, and achieve excellent The effect of microwave dielectric properties, high Qf value and good stability

Active Publication Date: 2018-11-30
XI AN JIAOTONG UNIV
View PDF4 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the ultra-low temperature sintered microwave dielectric ceramic systems that have been publicly reported are mainly Te-based and Mo-based. However, in these systems, Te raw materials are expensive and highly toxic, which is not suitable for mass production.
Mo-based materials often have strong water absorption, and their performance deteriorates seriously in the air, making it difficult to meet industrial stability requirements.

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
  • Ultra-low temperature sintering microwave dielectric ceramic material system, and preparation method and application thereof
  • Ultra-low temperature sintering microwave dielectric ceramic material system, and preparation method and application thereof
  • Ultra-low temperature sintering microwave dielectric ceramic material system, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Raw material Na will be analyzed for purity 2 CO 3 and WO 3 Prepare the main powder according to the ratio of 1:1, then fully mix the main powder and ball mill for 4 hours, pre-fire at 400°C for 4 hours after drying, and then crush the pre-fired block sample for the second time Ball mill for 4 hours, add 10wt% ethanol after grinding and drying, shape (sheet or column) as required under a pressure of 100MPa, press under a pressure of 200MPa in an isostatic press, and keep warm at 120°C for 2 hours to remove the ethanol. Then it is sintered at 565°C for 6 hours to form porcelain, and then the ultra-low temperature sintered microwave dielectric ceramic material can be obtained.

[0044] The present invention uses a network analyzer (8720ES Agilent) and a thermostat (DELTA 9023, Delta Design) to test the microwave dielectric properties and temperature spectrum of the sample by using a closed-cavity resonance method. The calculation formula of TCF is as follows:

[0045]...

Embodiment 2

[0050] Raw material Na will be analyzed for purity 2 CO 3 and WO 3 Prepare the main powder according to the ratio of 1:2, then fully mix the main powder and ball mill for 4 hours, pre-fire at 400°C for 4 hours after drying, and then crush the pre-fired block sample for the second time Ball mill for 4 hours, add 10wt% ethanol after grinding and drying, shape (sheet or column) as required under a pressure of 100MPa, press under a pressure of 200MPa in an isostatic press, and keep warm at 120°C for 2 hours to remove the ethanol. Then it is sintered in air at 650°C for 6 hours to form porcelain, and the ultra-low temperature sintered microwave dielectric ceramic material can be obtained.

[0051] The present invention uses a network analyzer (8720ES Agilent) and a thermostat (DELTA 9023, Delta Design) to test the microwave dielectric properties and temperature spectrum of the sample by using a closed-cavity resonance method. The calculation formula of TCF is as follows:

[005...

Embodiment 3

[0057] Raw material Na will be analyzed for purity 2 CO 3 and WO 3 Prepare the main powder according to the ratio of 1:4, then fully mix the main powder and ball mill for 4 hours, pre-fire at 550°C for 4 hours after drying, and then crush the pre-fired block sample for the second time Ball milling for 4 hours, adding 10wt% ethanol after grinding and drying, molding (sheet or column) as required under a pressure of 100MPa, pressing under a pressure of 200MPa in an isostatic press, keeping the temperature at 120°C for 2h to remove the ethanol, and then After sintering at 740°C for 6 hours in air, the ultra-low temperature sintered microwave dielectric ceramic material can be obtained.

[0058] The present invention uses a network analyzer (8720ES Agilent) and a thermostat (DELTA 9023, Delta Design) to test the microwave dielectric properties and temperature spectrum of the sample by using a closed-cavity resonance method. The calculation formula of TCF is as follows:

[0059...

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
Qfaaaaaaaaaa
Login to View More

Abstract

The invention discloses an ultra-low temperature sintering microwave dielectric ceramic material system, and a preparation method and application thereof. A structural general expression of the systemis Na2WxO3x+1 (x=1, 2, 4). The system can be sintered at a very low temperature (565 to 740 DEG C) and has excellent microwave dielectric properties (dielectric constant between 5 and 12, quality factor Qf between 10,000 GHz and 124,200 GHz, and temperature coefficient of frequency -60 ppm / DEG C to -80 ppm / DEG C). Powder preparation is carried out by an improved solid phase method, and calciningtemperature is 400 to 550 DEG C. The material system can be co-fired with Ag or Al electrodes and can be used to prepare low-temperature co-fired ceramic (LTCC) substrates for use in microwave resonators, filters, and panel antennas. The ceramic material system meets the requirements of environmental protection, and is non-toxic and pollution-free.

Description

technical field [0001] The invention belongs to the technical field of electronic ceramic material preparation, and in particular relates to a low-loss tungsten-based ultra-low temperature sintered microwave dielectric ceramic material and its preparation method and application. Background technique [0002] With the continuous development of modern communication technology, the industry has put forward higher and higher requirements for the miniaturization, portability, multi-function, high reliability, low cost and wearable of electronic products. As a very important technology in electronic communication, LTCC is mainly used in high-integration, high-performance electronic packaging technology, and has great potential in terms of design flexibility, wiring density and reliability. [0003] Most traditional electronic ceramics cannot meet the material requirements of LTCC technology. The reason is that the sintering temperature of ceramics is still too high to achieve co-f...

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): C04B35/495C04B35/622C04B35/626
CPCC04B35/495C04B35/622C04B35/6261C04B35/62675C04B2235/3201C04B2235/656C04B2235/96
Inventor 汪宏袁晓峰
Owner XI AN JIAOTONG UNIV
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