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Lead magnesium niobate-based ternary piezoelectric ceramic material with low hysteresis and large electrostrictive strain, and preparation method thereof

A lead-magnesium niobate-based ternary piezoelectric and ceramic material technology, which is applied to electrical components, piezoelectric/electrostrictive/magnetostrictive devices, circuits, etc., can solve problems such as hysteresis, and achieve low hysteresis and large current The effect of increasing strain and electrostrain

Inactive Publication Date: 2021-01-08
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the unique relaxation characteristics, the NBT system can generally produce a large hysteresis strain, which can even reach more than 0.7%. Applications in the field of actuators

Method used

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  • Lead magnesium niobate-based ternary piezoelectric ceramic material with low hysteresis and large electrostrictive strain, and preparation method thereof
  • Lead magnesium niobate-based ternary piezoelectric ceramic material with low hysteresis and large electrostrictive strain, and preparation method thereof
  • Lead magnesium niobate-based ternary piezoelectric ceramic material with low hysteresis and large electrostrictive strain, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A lead magnesium niobate-based ternary piezoelectric ceramic material with low hysteresis and large electrical strain, the chemical formula of the ceramic material is: (1- y)((1-x)Pb(Mg 1 / 3 Nb 2 / 3 )O 3 -xPbTiO 3 )-yBi(Zn 1 / 2 Ti 1 / 2 )O 3 , where x=0.27, y=0.125, referred to as PMN-PT-BZT for short. The preparation method of the above-mentioned lead magnesium niobate-based ceramic material with low hysteresis and large electrical strain comprises the following steps:

[0042] (1) Take Nb 2 o 5 and (MgCO 3 ) 4 ·Mg(OH) 2 ·5H 2 O is the raw material, according to the chemical formula MgNb 2 o 6 The stoichiometric ratio of Mg and Nb in the raw material is weighed, and the weighed raw material is placed in a ball milling tank, with absolute ethanol as the ball milling medium, and mixed for 6 hours by a planetary ball mill, and the mixture is dried, ground, and sieved. Calcined in a crucible at 1250°C for 4 hours to obtain MgNb 2 o 6 Powder;

[0043] (2) Accord...

Embodiment 2

[0052] The steps of this embodiment are basically the same as those of Embodiment 1, except that x=0.27; y=0.075. see Figure 4 , is the bipolar and unipolar strain curves measured for the ceramic sample of Example 2 at room temperature with a test electric field strength of 50 kV / cm.

Embodiment 3

[0054] The steps of this embodiment are basically the same as those of Embodiment 1, except that x=0.27; y=0.150. see Figure 5 , is the bipolar and unipolar strain curves measured for the ceramic sample of Example 3 at room temperature with a test electric field strength of 50 kV / cm.

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Abstract

The invention relates to a lead-magnesium-niobate-based ternary piezoelectric ceramic material with low hysteresis and large electrostrictive strain, and a preparation method thereof. The chemical general formula of the lead-magnesium-niobate-based ternary piezoelectric ceramic material is (1-y)((1-x)Pb(Mg<1 / 3>Nb<2 / 3>)-xPbTiO<3>)-yBi(Zn<1 / 2>Ti<1 / 2>)O<3>, wherein x is greater than or equal to 0.20and smaller than or equal to 0.40, and y is is greater than 0 and smaller than or equal to 0.30.

Description

technical field [0001] The invention relates to a lead magnesium niobate-based ternary piezoelectric ceramic material with low hysteresis and large electric strain and a preparation method thereof, belonging to the technical field of functional ceramic materials. Background technique [0002] Piezoelectric actuators can generate strain under the action of an electric field. Because of their advantages such as large driving force, high displacement accuracy, anti-electromagnetic interference, and light weight, they are widely used micro-displacement control devices. As the most important response unit of the piezoelectric actuator, the electrostrain behavior of the piezoelectric material plays a decisive role in the displacement performance of the actuator. Due to the advantages of low preparation cost and easy mass production, perovskite structure piezoelectric ceramic materials have been widely concerned for their application potential in the field of high-precision actuato...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/499C04B35/622C04B35/626C04B35/638C04B35/64H01L41/187H10N30/853
CPCC04B35/499C04B35/622C04B35/626C04B35/62605C04B35/62675C04B35/638C04B35/64C04B2235/3251C04B2235/3206C04B2235/3284C04B2235/3298C04B2235/656C04B2235/6567C04B2235/76H10N30/8548
Inventor 李国荣夏翔曾江涛郑嘹赢阮学政满振勇
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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