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Piezoelectric ceramic element with low capacitance change rate, piezoelectric ceramic and manufacturing method thereof

A technology of piezoelectric ceramic components and piezoelectric ceramics, applied in piezoelectric devices/electrostrictive devices, electrical components, piezoelectric/electrostrictive/magnetostrictive devices, etc., can solve the performance degradation of piezoelectric buzzers , affecting the stability of piezoelectric ceramic materials and other issues, to achieve the effect of reducing the capacitance change rate, low cost, and excellent piezoelectric performance

Active Publication Date: 2021-10-01
贵州振华电子信息产业技术研究有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This will seriously affect the stability of the piezoelectric ceramic material, resulting in a decrease in the overall performance of the piezoelectric buzzer

Method used

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  • Piezoelectric ceramic element with low capacitance change rate, piezoelectric ceramic and manufacturing method thereof

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preparation example Construction

[0026] The above-mentioned low capacitance change rate piezoelectric ceramics can be directly prepared according to existing preparation methods. In order to further improve its piezoelectric performance and stability, the present invention provides a method for manufacturing the above-mentioned low capacitance change rate piezoelectric ceramics. include:

[0027] S1. After the raw materials are prepared according to the general stoichiometric formula of piezoelectric ceramics with a low capacitance change rate, pre-sintered piezoelectric ceramics are obtained through pre-milling, drying, briquetting, and pre-sintering.

[0028] Raw materials are configured according to the general stoichiometric formula of low capacitance change rate piezoelectric ceramics. The raw materials here are to weigh the corresponding metal oxides or metal salts according to the stoichiometric ratio of each metal element in the general stoichiometric formula, and the capacitance is stable. agent, mix...

Embodiment 1

[0044] A low capacitance change rate piezoelectric ceramic element, which includes low capacitance change rate piezoelectric ceramics and metal electrodes.

[0045] The general stoichiometric formula of piezoelectric ceramics with low capacitance change rate is: 0.82Pb(Zr m Ti n )O3-0.05Pb(Zn 1 / 3 Nb 2 / 3 )O 3 -0.1Pb(Ni 1 / 3 Nb 2 / 3 )O 3 -0.03Pb(Sb 1 / 3 Nb 2 / 3 )O 3 +ywt% capacitance stabilizer, where m / n=0.94; y=0.5. The proportion of the component niobium zinc-niobium nickel-niobium antimony-lead zirconate titanate pentad system is 99.5wt%.

[0046] The capacitor stabilizer is a mixture of cerium oxide, aluminum oxide and cadmium oxide, among which CeO 2 Accounting for 40wt% of the capacitor stabilizer, Al 2 o 3 It accounts for 40wt% of the capacity stabilizer, and CdO accounts for 20wt% of the capacity stabilizer.

[0047] Low capacitance change rate piezoelectric ceramic elements are made by the following methods:

[0048] According to the general stoichiometric f...

Embodiment 2

[0053] A low capacitance change rate piezoelectric ceramic element, which includes low capacitance change rate piezoelectric ceramics and metal electrodes.

[0054] The general stoichiometric formula of piezoelectric ceramics with low capacitance change rate is: 0.82Pb(Zr m Ti n )O 3 -0.05Pb(Zn 1 / 3 Nb 2 / 3 )O 3 -0.1Pb(Ni 1 / 3 Nb 2 / 3 )O 3 -0.03Pb(Sb 1 / 3 Nb 2 / 3 )O 3 +ywt% capacitance stabilizer, where m / n=0.94; y=0.2. The proportion of the component niobium zinc-niobium nickel-niobium antimony-lead zirconate titanate pentad system is 99.8wt%.

[0055] The capacitor stabilizer is a mixture of cerium oxide, aluminum oxide and cadmium oxide, among which CeO 2 Accounting for 40wt% of the capacitor stabilizer, Al 2 o 3 It accounts for 40wt% of the capacity stabilizer, and CdO accounts for 20wt% of the capacity stabilizer.

[0056] The piezoelectric ceramic element with low capacitance change rate is prepared by the method provided in Example 1.

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Abstract

The invention relates to a piezoelectric ceramic element with a low capacitance change rate, a piezoelectric ceramic and a manufacturing method thereof, and relates to the field of piezoelectric ceramics. The general stoichiometric formula of piezoelectric ceramics with low capacitance change rate is: 0.82Pb(Zr m Ti n )O 3 ‑0.05Pb(Zn 1 / 3 Nb 2 / 3 )O 3 ‑0.1Pb(Ni 1 / 3 Nb 2 / 3 )O 3 -0.03Pb(Sb 1 / 3 Nb 2 / 3 )O 3 +ywt% capacitance stabilizer, wherein, m / n=0.92-0.96, y=0.2-1.0; the low capacitance change rate piezoelectric ceramics and piezoelectric ceramic components obtained through the improvement of the formula have excellent dielectric, piezoelectric Electrical performance and low capacitance change rate, and the manufacturing method adopted by the present invention is simple, low in cost, easy to mass produce, while ensuring the dielectric and piezoelectric performance of the piezoelectric buzzer, it improves the stability of the piezoelectric buzzer, Can be widely used in buzzer devices.

Description

technical field [0001] The invention relates to the field of piezoelectric ceramics, and in particular to a piezoelectric ceramic element with a low capacitance change rate, piezoelectric ceramics and a manufacturing method thereof. Background technique [0002] Piezoelectric buzzers have the advantages of high reliability, low power consumption, pure sound, low noise and small size, and are widely used in various electroacoustic devices. The principle is that when the applied voltage acts between the two electrodes of the piezoelectric element, due to the inverse piezoelectric effect, the piezoelectric ceramic body will be mechanically deformed, forming the so-called "electrostrictive" phenomenon, and achieving the purpose of sounding. [0003] With the rapid development of the electronics industry, the performance requirements for piezoelectric buzzers are getting higher and higher, especially the requirements for the sound pressure and temperature stability of piezoelectr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L41/09H01L41/187G10K9/122C04B35/493C04B35/622H10N30/20H10N30/853
CPCG10K9/122C04B35/493C04B35/622C04B2235/3217C04B2235/3294C04B2235/3284C04B2235/3279C04B2235/3251C04B2235/3229C04B2235/6567C04B2235/6562H10N30/20H10N30/8548H10N30/8554
Inventor 张元松张静燕周民张珍宣戴昭波
Owner 贵州振华电子信息产业技术研究有限公司