A kind of composite phosphate microwave dielectric ceramic and its preparation method

A technology of microwave dielectric ceramics and phosphate series, applied in the field of microwave dielectric ceramics, can solve the problems of high energy consumption, high sintering temperature, and low quality factor, and achieve the effects of low loss, simple preparation process, and no pollution in the process

Active Publication Date: 2021-03-05
福建溥昱电子科技有限公司
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Newly developed composite phosphate-based material Ca 4 (La 4 PR 2 ) (SiO 4 ) 4 (PO 4 ) 2 o 2 It has good microwave dielectric properties, but it has high sintering temperature (above 1550 ℃), high energy consumption, and low quality factor (~25000GHz)

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 composite phosphate microwave dielectric ceramic and its preparation method
  • A kind of composite phosphate microwave dielectric ceramic and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0030] The present invention also provides a method for preparing a composite phosphate-based microwave dielectric ceramic, which is characterized in that the specific preparation steps are as follows:

[0031] (1) The chemical raw material will be the chemical raw material will be CaCO 3 , La 2 o 3 , SiO 2 、 Bi 2 o 3 、Pr 2 o 3 and NH 4 h 2 PO 4 stoichiometric Ca 4 (La 4-x Bi x PR 2 ) (SiO 4 ) 4 (PO 4 ) 2 o 2 (0.2≤x≤0.8) Stoichiometric composition Weighing ingredients into pre-grinding ingredients;

[0032] (2) Put the pre-grinding ingredients into a ball milling tank for ball milling, and place them in a drying oven to dry into powder after ball milling; wherein the ratio of pre-grinding ingredients, zirconia balls and deionized water inside the ball milling tank is 1:2.5:3, The ball milling time is 14-18h, and the drying temperature is 120°C;

[0033] (3) Calcining the powder to obtain calcined powder; wherein the calcining temperature is 1150°C, and the ...

Embodiment 1

[0040] Take x=0.2, y=0.5, z=0.5, C=WO 3 ;

[0041] (1) CaCO 3 , La 2 o 3 , SiO 2 、 Bi 2 o 3 、Pr 2 o 3 , NH 4 h 2 PO 4 stoichiometric Ca 4 (La 3.8 Bi 0.2 PR 2 ) (SiO 4 ) 4 (PO 4 ) 2 o 2 Composition Weighing ingredients, after mixing, put the raw materials into the nylon tank, add zirconia balls and deionized water (the ratio of ball water is 1:2.5:3). Ball mill for 14-18 hours, place the ball-milled raw materials in an oven, and dry at 120°C;

[0042] (2) The uniformly mixed powder is calcined at 1150°C for 3h;

[0043] (3) put the calcined raw material in step (2) into the ball mill jar, and add 1.0wt% Li at the same time 2 CO 3 and 0.5 wt% WO 3 , add zirconia balls and deionized water, ball mill for 20-24 hours, dry, add PVA solution with a mass solubility of 3% to the dried powder as a binder and granulate, press into a cylindrical embryo body , the diameter of the embryo body is about 15mm, and the height is about 7.5mm;

[0044] (4) Sinter the cyl...

Embodiment 2

[0050] Following Example 1, on the basis of Example 1, select x=0.6, y=0.5 components to add zwt%C substances, and the rest are the same as Example 1. The test results are shown in Table 2.

[0051] The experimental result involved in table 2 embodiment 2:

[0052]

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
diameteraaaaaaaaaa
heightaaaaaaaaaa
quality factoraaaaaaaaaa
Login to view more

Abstract

The invention discloses a composite phosphate-based microwave dielectric ceramic, the chemical formula of which is Ca 4 (La 4 ‑xBi x PR 2 ) (SiO 4 ) 4 (PO 4 ) 2 o 2 (0.2≤x≤0.8)+ywt%Li 2 CO 3 (0.5≤y≤1.0)+zwt%C(0 <z≤1)。本发明还公开一种复合磷酸盐系微波介质陶瓷的制备方法，具体制备步骤如下：(1)将化学原料将化学原料将caco3. La 2 o 3 , SiO 2 、 Bi 2 o 3 、Pr 2 o 3 and NH 4 h 2 PO 4 stoichiometric Ca 4 (La 4 ‑xBi x PR 2 ) (SiO 4 ) 4 (PO 4 ) 2 o 2 (0.2≤x≤0.8) The stoichiometric composition weighs the ingredients into pre-ground ingredients; (2) puts the pre-ground ingredients into a ball mill tank for ball milling, and after ball milling, puts them in a drying oven to dry them into powder; (3) puts the powder (4) weigh the calcined powder and put it into a ball mill jar, add 0.5-1.0wt% Li 2 CO 3 , 0~1.0wt% C, zirconia balls and deionized water, ball milling and drying to obtain drying powder; add binder to the drying powder to granulate, and press into embryo body; (5) embryo body Carry out middle temperature sintering into microwave dielectric ceramics; (6) test the microwave dielectric properties of microwave dielectric ceramics.

Description

technical field [0001] The invention belongs to the technical field of microwave dielectric ceramics, and in particular relates to a composite phosphate-based microwave dielectric ceramic and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of Beidou navigation and 5G communication technology, the demand for high-performance microwave dielectric ceramics is increasing. Microwave dielectric ceramics are required to have medium and low dielectric constants, low microwave losses and near-zero resonance frequency temperature coefficients. This kind of ceramic can not only meet the requirements of mobility, portability, miniaturization, and miniaturization of the communication machine, but also meet the requirements of high performance and high reliability working characteristics in the microwave range, and has attracted widespread attention. [0003] The basic performance requirements of microwave dielectric materials used i...

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): C04B35/447C04B35/622
CPCC04B35/447C04B35/622C04B2235/3208C04B2235/3224C04B2235/3227C04B2235/3298C04B2235/3418C04B2235/96
Inventor 黄有华郑兰兰
Owner 福建溥昱电子科技有限公司
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