A kind of dielectric ceramic material and preparation method thereof

A technology of dielectric ceramics and ceramic powders, applied in the direction of ceramics, inorganic insulators, etc., can solve problems such as difficult densification, low density, and loose ion arrangement

Active Publication Date: 2021-09-14
ANHUI TATFOOK TECH CO LTD
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the long-term research and development process, the inventor of the present application found that Y 2 Ba(Cu 1-x Mg x )O 5 The quality factor Q value of ceramic materials is low (quality factor Q value is less than 4000GHz); AWO 4 Ceramic materials due to AWO 4 It is difficult to densify, so that the density is not high; Al 2 o 3 Al in ceramic materials 2 o 3 The higher the content (90% ~ 99%), the better its overall performance, the higher the required sintering temperature, up to 1600 ° C; the main crystal phase of cordierite ceramic material is 2MgO 2Al 2 o 3 ·5SiO2 2 , the ions of this material are not tightly arranged, and there are large gaps in the crystal lattice, so it is not easy to be dense, and the dielectric loss is large; the talc ceramic material is based on natural talc (3MgO 4SiO 2 ·H 2 O) is made of raw materials, and its layered structure leads to poor thermal stability

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
  • A kind of dielectric ceramic material and preparation method thereof
  • A kind of dielectric ceramic material and preparation method thereof
  • A kind of dielectric ceramic material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0038] see image 3 , image 3 A schematic flow chart of an embodiment of the method for preparing a dielectric ceramic material of the present invention. The preparation method of the dielectric ceramic material in this embodiment includes:

[0039] Step S101, performing the first high-energy ball milling on the starting materials of magnesium oxide and silicon dioxide with a purity of more than 99.9% to obtain nanopowder;

[0040] Among them, [2MgO+(1+x)SiO 2 ] The mass percentage in the dielectric ceramic material is not less than 75%, further, [2MgO+(1+x)SiO 2 ] in the range of 75%-95% by mass, such as 75%, 85% or 95, etc., wherein the molar ratio of magnesium oxide to silicon dioxide is 2: (1+x), wherein, 0≤x≤0.2, For example, the value of x is 0.5, 1, 1.5, etc.

[0041] The particle size d50 of the nano-powder after the first high-energy ball milling is distributed within the range of 50-400nm. Further, the d50 of the nano-powder is distributed within the range of 5...

Embodiment 1

[0070] The raw material ratio expression of the present embodiment is: [2MgO+(1+0.05)SiO 2 ]+5wt%TiO 2 +0.25wt% CoO, using magnesium oxide, silicon dioxide, titanium dioxide, and cobaltous oxide with a purity of more than 99% as the main raw materials, through the following steps.

[0071] 1. Using magnesium oxide and silicon dioxide with a purity of more than 99% as the starting powder, according to the expression 2MgO+(1+0.05)SiO 2 After the required mole percentage is weighed, zirconia balls and deionized water are added into the ball milling medium, and mixed mechanically, and dried after mixing to obtain a dry powder. Wherein, the weight ratio of starting powder, ball milling medium and deionized water is 1:1.5:2, and the mixing time is 4 hours.

[0072]2. The dry powder obtained in step 1 is subjected to high-energy ball milling for the first time to obtain nanometer powder. Among them, the ball-to-material ratio is 5:1, the rotating speed is 550 rpm, the ball milling...

Embodiment 2

[0078] The raw material ratio expression of the present embodiment is: [2MgO+(1+0.1)SiO 2 ]+8wt%TiO 2 +0.4wt% CoO, using magnesium oxide, silicon dioxide, titanium dioxide, and cobaltous oxide with a purity of more than 99% as the main raw materials, through the following steps.

[0079] 1. Using magnesium oxide and silicon dioxide with a purity of more than 99% as the starting powder, according to the expression 2MgO+(1+0.1)SiO 2 After the required mole percentage is weighed, zirconia balls and deionized water are added into the ball milling medium, and mixed mechanically, and dried after mixing to obtain a dry powder. Wherein, the weight ratio of starting powder, ball milling medium and deionized water is 1:1.5:2, and the mixing time is 4 hours.

[0080] 2. The dry powder obtained in step 1 is subjected to high-energy ball milling for the first time to obtain nanometer powder. Among them, the ball-to-material ratio is 6:1, the rotating speed is 600 rpm, the ball milling t...

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
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to view more

Abstract

A dielectric ceramic material and a preparation method thereof. The dielectric ceramic material contains titanium dioxide and cobaltous oxide. The quality factor Q value of the dielectric ceramic material is high, and the compactness is high. At the same time, the temperature during heating and sintering is also reduced; because it contains titanium dioxide and cobaltous oxide, the temperature coefficient of the resonant frequency of the material can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of ceramic materials, in particular to a dielectric ceramic material and a preparation method thereof. Background technique [0002] Microwave dielectric ceramic materials are new functional electronic ceramic materials that are used as dielectric materials and perform one or more functions in the application of microwave frequency band circuits. They are the key basic materials of modern communication technology. With the rapid development of microwave communication, microwave communication systems urgently need high-performance microwave dielectric devices. At present, the frequency range of mobile communication is in the L-band. Although the corresponding microwave dielectric devices have been industrialized, when the frequency develops to high-end, such as the frequency of satellite TV receivers and highway toll systems are located in the C-band, the existing microwave dielectric The dielectric constant...

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 Patents(China)
IPC IPC(8): C04B35/04C04B35/622H01B3/12
CPCC04B35/04C04B35/622C04B2235/3232C04B2235/3275C04B2235/3418C04B2235/5445C04B2235/5454C04B2235/602C04B2235/656C04B2235/6567H01B3/12
Inventor 曾俊陆正武袁亮亮
Owner ANHUI TATFOOK TECH CO LTD
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