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

A temperature-stabilized piezoelectric ceramic vibrator

A technology of piezoelectric ceramics and dielectric ceramics, applied in the field of piezoelectric ceramics, can solve problems such as difficulty in mass industrialization, and achieve the effects of improving piezoelectric performance and reliability, improving capacitance-temperature coefficient, and expanding application scope.

Active Publication Date: 2018-04-24
欧明 +4
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing piezoelectric ceramic vibrator must maintain good piezoelectric electrical properties (dielectric constant, electromechanical coupling coefficient) and at the same time control its capacity change rate to ±10%, which is difficult to mass industrialize.

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 temperature-stabilized piezoelectric ceramic vibrator
  • A temperature-stabilized piezoelectric ceramic vibrator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033]The capacitance temperature change rate of piezoelectric ceramics at -30°C is -14.8%, and the capacitance temperature change rate at +85°C is +12.8%; the capacitance temperature change rate of dielectric ceramics at -30°C is 217%. The capacity temperature change rate at +85°C is -55.2%, the thickness of the dielectric ceramic medium is 20 microns, and the dielectric ceramic medium is fixed on the top or bottom of the piezoelectric ceramic with epoxy resin. Both the piezoelectric ceramic and the dielectric ceramic medium are sintered by the solid-state method to form a multilayer ceramic structure. The first and second electrode layers are silver electrodes with a thickness of 5 microns, and the piezoelectric ceramic vibrator is made as required.

Embodiment 2

[0035] The capacitance temperature change rate of piezoelectric ceramics at -30°C is -15%, and the capacitance temperature change rate at +85°C is +15%; the capacitance temperature change rate of dielectric ceramics at -30°C is 250%. The capacity temperature change rate at +85°C is -60%, the thickness of the dielectric ceramic medium is 40 microns, and the dielectric ceramic medium is fixed on the top or bottom of the piezoelectric ceramic with conductive silver glue. Piezoelectric ceramics and dielectric ceramic media are sintered by solid-state method to form a multilayer ceramic structure. The first and second electrode layers are silver / palladium electrodes with a thickness of 20 microns, and piezoelectric ceramic vibrators are made according to requirements.

Embodiment 3

[0037] The capacitance temperature change rate of piezoelectric ceramics at -30°C is -14.8%, and the capacitance temperature change rate at +85°C is +12.8%; the capacitance temperature change rate of dielectric ceramics at -30°C is 150%. The capacity temperature change rate at +85°C is -30%, the thickness of the dielectric ceramic medium is 60 microns, and the dielectric ceramic medium is fixed on the top or bottom of the piezoelectric ceramic with epoxy resin. Piezoelectric ceramics and dielectric ceramics are sintered by solid-state method to form a multilayer ceramic structure. The first electrode layer is silver / palladium electrode, and the second electrode layer is silver electrode. The thickness is 10 microns. Electric ceramic vibrator.

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
thicknessaaaaaaaaaa
piezoelectric charge coefficientaaaaaaaaaa
piezoelectric charge coefficientaaaaaaaaaa
Login to View More

Abstract

The present invention provides a temperature-stabilized piezoelectric ceramic vibrator, comprising: a piezoelectric ceramic, a first electrode layer is formed on the top and bottom surfaces of the piezoelectric ceramic; a dielectric ceramic medium is formed on the piezoelectric ceramic The surface of the first electrode layer on the top or the bottom is covered with a layer of dielectric ceramic medium, and a second electrode layer is formed on the surface of the dielectric ceramic medium, the length of the dielectric ceramic medium is slightly shorter than the piezoelectric ceramic; the first Lead-out end, the first lead-out end is in close contact with the first electrode layer opposite to the dielectric ceramic medium covered on the piezoelectric ceramic; second lead-out end, the second lead-out end is in close contact with the surface of the dielectric ceramic medium The formed second electrode layer is in close contact; wherein, the capacitance temperature change of the piezoelectric ceramic at -30°C-85°C is within ±15%, and the capacitance temperature change of the dielectric ceramic medium at -30°C-85°C Within ‑60%‑+250%.

Description

technical field [0001] The invention relates to the field of piezoelectric ceramics, in particular to a temperature-stabilized piezoelectric ceramic vibrator, in particular to a piezoelectric ceramic vibrator used for a reversing radar probe. Background technique [0002] Since the advent of piezoelectric ceramics, many countries at home and abroad have conducted systematic research on piezoelectric ceramics, and with the deepening of research, they have also developed a series of PZT piezoelectric ceramic materials with superior performance, and the application of piezoelectric ceramic materials The scope has also been greatly expanded, among which lead zirconate titanate is used as the basis for modification. In order to obtain high-performance piezoelectric ceramics, most of the PZT materials themselves are doped and modified at present, and the performance of the PZT piezoelectric ceramics is adjusted by doping the A-site or B-site ions in the PZT piezoelectric ceramics....

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): H01L41/187H01L41/083C04B35/491C04B35/49H10N30/853H10N30/50
CPCC04B35/49C04B35/491C04B2235/3215C04B2235/3224H10N30/50H10N30/8536H10N30/853H10N30/8554
Inventor 欧明姜知水文理董进杰
Owner 欧明
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