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Piezoelectric material and preparation method thereof

A piezoelectric material and binder technology, which can be used in piezoelectric/electrostrictive/magnetostrictive devices, circuits, electrical components, etc., and can solve the problems of high resonance impedance coupling coefficient, low mechanical Q value, high sensitivity, etc. , to achieve the effect of improving piezoelectric performance, reducing Qm value, and improving piezoelectric coefficient

Active Publication Date: 2012-10-03
WUXI ZHONGKE ULTRASONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The ceramic material has extremely low mechanical Q value, high sensitivity, high resonance impedance and suitable coupling coefficient, dielectric constant, and low cost, but the ceramic material does not involve the aspect of piezoelectric coefficient d33

Method used

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  • Piezoelectric material and preparation method thereof
  • Piezoelectric material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] (1) Select compounds containing the required elements (PbO, BaO, MgO, NiO, TiO 2 , ZrO 2 , Nb 2 o 5 ), batching according to the chemical composition of the compound to be prepared, pre-pressing after ball milling, pre-calcining, rolling ball milling again, to obtain substance a;

[0051] (2) Adding a binder to substance a to granulate, forming and discharging plastic, and then sintering to obtain substance b;

[0052] (3) Substance b is subjected to polarization treatment to obtain a piezoelectric material with the following chemical composition: Pb 0.98 Ba 0.01 Mg 0.01 [(Ni 1 / 3 Nb 2 / 3 ) 0.1 · Zr 0.6 · Ti 0.3 ]O 3 .

[0053] The mass of the compound containing the desired elements can be calculated from the chemical composition of the final piezoelectric material.

Embodiment 2

[0055] (1) Select compounds containing the required elements (lead carbonate, strontium carbonate, magnesium carbonate, NiO, Nb 2 o 5 , zirconium carbonate, titanium nitride), according to the chemical composition of the compound to be prepared, the ingredients are pre-pressed after ball milling, pre-calcined, and ball milled again to obtain substance a;

[0056] (2) Adding a binder to substance a to granulate, forming and discharging plastic, and then sintering to obtain substance b;

[0057] (3) Substance b is subjected to polarization treatment to obtain a piezoelectric material with the following chemical composition: Pb 0.9 Sr 0.05 Mg 0.05 [(Ni 1 / 3 Nb 2 / 3 ) 0.7 · Zr 0.2 · Ti 0.1 ]O 3 .

[0058] The mass of the compound containing the desired elements can be calculated from the chemical composition of the final piezoelectric material.

Embodiment 3

[0060] (1) Select compounds containing the required elements (lead carbonate, lanthanum carbonate, barium carbonate, NiO, Nb 2 o 5 , titanium nitrate, zirconium nitrate), ingredients according to the chemical composition of the compound to be prepared, pre-pressed after ball milling, pre-calcined, rolling ball milling again, to obtain substance a;

[0061] (2) Adding a binder to substance a to granulate, forming and discharging plastic, and then sintering to obtain substance b;

[0062] (3) Substance b is subjected to polarization treatment to obtain a piezoelectric material with the following chemical composition: Pb 0.95 La 0.02 Ba 0.03 [(Ni 1 / 3 Nb 2 / 3 ) 0.2 · Zr 0.1 · Ti 0.7 ]O 3 .

[0063] The mass of the compound containing the desired elements can be calculated from the chemical composition of the final piezoelectric material.

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Abstract

The invention relates to a piezoelectric material and a preparation method thereof. The chemical constitution of the piezoelectric material is shown as follows: Pb1-x-yMe1xMe2y[(Ni1 / 3Nb2 / 3a.Zrb.Tic)O3, wherein Me1 and Me2 are independently selected from one of or combination of at least two of Ba, Ca, Sr, Mg and La; x and y are equal to 0.02 to 0.1; a is 0.1 to 0.7; b is 0.1 to 0.6; c is 0.1 to 0.8; and a, b and c are equal to 1. The piezoelectric material has the advantages of high piezoelectric coefficient and low mechanical quality factor, has other excellent performance and can be widely applied in the fields of high-sensitivity flowmeter sensors, piezoelectric loudspeakers, brakes, micro-positioning systems, hydroacoustic engineering, passive sonar and the like.

Description

technical field [0001] The invention relates to a piezoelectric material, in particular to a piezoelectric material with a high piezoelectric coefficient d33 and a low mechanical quality factor Qm and a preparation method thereof. Background technique [0002] Materials can be divided into two categories: structural materials and functional materials in terms of performance. Among them, structural materials are based on their mechanical properties such as strength, toughness, hardness, and elasticity. Functional materials are based on their electrical, magnetic, optical, sound, thermal, etc. Based on physical properties, it is used to make devices with special functions. Piezoelectric materials are functional materials that convert mechanical energy to electrical energy. They are electronic materials that are sensitive to mechanics, electricity, sound, light, and heat. They are widely used in industrial sectors and high-tech fields. [0003] Piezoelectric materials are divi...

Claims

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Application Information

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IPC IPC(8): C04B35/491C04B35/472C04B35/499C04B35/622C04B35/634H01L41/187
Inventor 陈国超陈伟
Owner WUXI ZHONGKE ULTRASONIC TECH
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