Multicomponent-system high-piezoelectric-activity piezoelectric ceramic material and preparation method therefor

A piezoelectric ceramic and high-voltage technology, which is applied in the field of multi-element high-voltage electroactive piezoelectric materials and their preparation, can solve rare problems and achieve improved piezoelectric strain constant, high yield rate, and reproducibility Good results

Active Publication Date: 2017-03-22
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the research work of piezoelectric ceramics is mainly concentrated in the research of ternary and

Method used

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  • Multicomponent-system high-piezoelectric-activity piezoelectric ceramic material and preparation method therefor
  • Multicomponent-system high-piezoelectric-activity piezoelectric ceramic material and preparation method therefor
  • Multicomponent-system high-piezoelectric-activity piezoelectric ceramic material and preparation method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Taking the production of 0.25mol product of the present invention as an example, use the chemical formula

[0033] 0.01Pb(Ni 1 / 3 Nb 2 / 3 )O 3 -0.01Pb(Zn 1 / 3 Sb 2 / 3 )O 3 -0.01Pb(Zn 1 / 3 Nb 2 / 3 )O 3 -0.97Pb 1-m- n Ba m Sr n Ti 0.45 Zr 0.55 o 3 -pWO 3 Indicates that x, y, z are all 0.01, A is 0.45, 0.04≤m≤0.08, 0.08≤n≤0.12, p=0.003.

[0034] (1) According to the chemical formula NiNb 2 o 6 , ZnSb 2 o 6 , ZnNb 2 o 6 Weigh raw materials NiO, ZnO, Sb 2 o 3 , Nb 2 o 5 and some Pb 3 o 4 、BaCO 3 , SrCO 3 (the amount of lead, barium, and strontium added to the substance account for 16%, 14%, and 70% of the total molar amount of the respective elements respectively) and mix in the ball mill tank. The ball mill medium is deionized water and zirconia balls. The raw material and The mass ratio of zirconia is 1:3, ball milled at 380r / min for 4h, and dried at 150°C.

[0035] (2) Put the mixed powder obtained in step (1) into a corundum crucible, compact it,...

Embodiment 2

[0049] Taking the production of 0.25mol product of the present invention as an example, use the general formula

[0050] 0.01Pb(Ni 1 / 3 Nb 2 / 3 )O 3 -0.01Pb(Zn 1 / 3 Sb 2 / 3 )O 3 -0.01Pb(Zn 1 / 3 Nb 2 / 3 )O 3 -0.97Pb 1-m- n Ba m Sr n Ti A Zr 1-A o 3 -pWO 3 It means that x, y, z are all 0.01, m is 0.06-0.08, n is 0.10-0.12, A is 0.42-0.45, p=0.003.

[0051] Its preparation and testing methods are the same as in Example 1, and the properties measured are shown in Table 2.

[0052] Table 2. Electrical properties of ceramics with varying Zr / Ti ratios under different Ba and Sr contents

[0053]

[0054] It can be seen from Table 2 that when the contents of Ba and Sr are 0.08, 0.12, 0.08, 0.10 and 0.06, 0.12, respectively, as the Zr / Ti ratio moves toward the zirconium-rich direction, the bulk density ρ of piezoelectric ceramics decreases gradually. Relative permittivity ε r Then gradually increase; when Ba, Sr content is 0.06, 0.10, the relative permittivity ε r is gr...

Embodiment 3

[0064] Taking the production of 0.25mol product of the present invention as an example, use the general formula

[0065] xPb(Ni 1 / 3 Nb 2 / 3 )O 3 -0.01Pb(Zn 1 / 3 Sb 2 / 3 )O 3 -0.01Pb(Zn 1 / 3 Nb 2 / 3 )O 3 –(0.98-x)Pb 0.82 Ba 0.08 Sr 0.10 Ti 0.435 Zr 0.555 o 3 -pWO 3 It means that 0.01≤x≤0.04, y and z are both 0.01, m is 0.08, n is 0.10, A is 0.44, p=0.003.

[0066] (1) According to the chemical formula NiNb 2 o 6 , ZnSb 2 o 6 , ZnNb 2 o 6 Weigh raw materials NiO, ZnO, Sb 2 o 3 , Nb 2 o 5 and some Pb 3 o 4 、BaCO 3 , SrCO 3 (respectively accounting for 16%, 14% and 70% of the total amount of elements) into the ball mill tank for mixing. The ball milling medium is deionized water and zirconia balls. The mass ratio of raw materials to zirconia is 1:3. Ball mill for 4 hours at rpm, and dry at 150°C.

[0067] (2) Put the powder obtained in step (1) into a corundum crucible, compact it, cover it, pre-fire it at 1200°C, keep it warm for 3 hours, and the heating ...

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Abstract

The invention relates to a multicomponent-system high-piezoelectric-activity piezoelectric ceramic material and a preparation method therefor and belongs to the technical field of nonmetallic materials. The composition of the material is represented by a general formula, i.e., xPb(Ni<1/3>Nb<2/3>)O<3-y>Pb(Zn<1/3>Sb<2/3>)O<3-z>Pb(Zn<1/3>Nb<2/3>)O3-(1-x-y-z)Pb<1-m-n>BamSrnTiAZr<1-A>O<3-p>WO3, wherein x is not smaller than 0.01 and not greater than 0.14, y is not smaller than 0.01 and not greater than 0.07, z is not smaller than 0.005 and not greater than 0.10, m is not smaller than 0.02 and not greater than 0.16, n is not smaller than 0.02 and not greater than 0.12, A is not smaller than 0.42 and not greater than 0.53, and p is not smaller than 0.002 and not greater than 0.015. The preparation method for the material comprises the steps of synthesizing ingredients, carrying out preburning, carrying out ball-milling, carrying out granulating, carrying out forming, carrying out degumming, carrying out embedded burning, carrying out silver roasting and carrying out polarization. The preparation method has the advantages of simple processing steps, good repeatability and high nondefective rate; and compared with properties of like piezoelectric materials reported in the literature, the properties, i.e., piezoelectric strain constant d33 and planar electromechanical coupling factor Kp of prepared ceramic samples are improved obviously, so that industrial large-scale production is facilitated.

Description

technical field [0001] The invention belongs to the technical field of non-metallic materials, and mainly relates to piezoelectric electronic devices and electrostrictive devices, in particular to a multi-element system high-voltage electroactive piezoelectric material and a preparation method thereof. Background technique [0002] As an important part of inorganic non-metallic materials——piezoelectric ceramics, the mutual conversion of electrical energy and mechanical energy can be realized. Mechanical stress causes the relative displacement of the internal positive and negative charge centers, and polarization occurs, so that opposite signs appear on the surfaces of the two ends of the material. charge to produce piezoelectric effect. The piezoelectric effect includes two parts: the direct piezoelectric effect and the inverse piezoelectric effect. The positive piezoelectric effect is the effect of applying a force to the medium in a certain direction, causing polarization...

Claims

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Application Information

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IPC IPC(8): C04B35/493C04B35/626C04B35/622
CPCC04B35/493C04B35/622C04B35/62645C04B2235/3213C04B2235/3215C04B2235/3251C04B2235/3258C04B2235/3279C04B2235/3284C04B2235/3294C04B2235/77C04B2235/786C04B2235/96
Inventor 李坤陈森成炎炎
Owner CHANGZHOU UNIV
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