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Method for preparing PZN based multi-element composite perovskite type piezoelectric ceramics

A technology of composite perovskite and piezoelectric ceramics, which is applied in the field of preparation of multi-component composite perovskite piezoelectric ceramics, can solve the problem that the pyrochlore phase cannot be effectively eliminated and serious pyrochlore phases can be eliminated, and the pyrochlore phase can be suppressed. The formation of stone phase, high sintering quality, and the effect of increasing the content

Inactive Publication Date: 2013-04-03
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In the above method, when the PZN content exceeds a certain level, severe pyrochlore phases will appear, and the pyrochlore phases cannot be effectively eliminated.

Method used

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  • Method for preparing PZN based multi-element composite perovskite type piezoelectric ceramics
  • Method for preparing PZN based multi-element composite perovskite type piezoelectric ceramics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1 Preparation of 0.30PYN-0.45PZN-0.25PT

[0017] According to the chemical formula, the dosage is 0.01mol. Weigh Yb separately 2 o 3 , ZnO, Nb 2 o 5 Each 0.2956g, 0.1221g, 0.5981g, put it in an agate mortar, add absolute ethanol and grind it manually for 2h; dry it, press it under 10Mpa; then put it in a covered crucible for calcination, and react at 1000℃ 4h; Weigh the obtained YZN mixture and PbO (excess 1%), TiO 2 2.2408g and 0.1945g each, in an agate mortar, add absolute ethanol and manually grind for 2h; dry, press into tablets at 10Mpa; react at 850°C for 5h; obtain 0.30PYN-0.45PZN-0.25PT ceramic powder.

[0018] Put the obtained ceramic powder in an agate mortar, add absolute ethanol and manually grind for 2 hours, add an appropriate amount of 5wt% PVA, mix evenly; dry, press into a disc with a diameter of 10mm and a thickness of 1mm at 14Mpa; Plastic discharge at 500°C for 2 hours; then cold isostatic pressing at 200Mpa for 2 minutes; sintering met...

Embodiment 2

[0019] Example 2 Preparation of 0.28PYN-0.45PZN-0.27PT

[0020] According to the chemical formula, the dosage is 0.01mol. Weigh Yb separately 2 o 3 , ZnO, Nb 2 o 5 0.2758g, 0.1221g, 0.5848g each, put them in an agate mortar, add absolute ethanol and grind them by hand for 2h; dry, press into tablets at 10Mpa; then place them in a covered crucible for calcination, and react at 1000°C 4h; Weigh the obtained YZN mixture and PbO (excess 1%), TiO 2 2.277g and 0.2089g respectively; other steps are as in Example 1.

Embodiment 3

[0021] Example 3 Preparation of 0.27PYN-0.45PZN-0.28PT

[0022] According to the chemical formula, the dosage is 0.01mol. Weigh Yb separately 2 o 3 , ZnO, Nb 2 o 5 Each 0.266g, 0.1221g, 0.5781g, put it in an agate mortar, add absolute ethanol and grind it manually for 2h; dry it, press it under 10Mpa; then put it in a covered crucible for calcination, and react at 1000℃ 4h; Weigh the obtained YZN mixture and PbO (excess 1%), TiO 2 Each 2.1024g, 0.2045g; other steps are as in Example 1.

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Abstract

The invention discloses a method for preparing PZN based multi-element composite perovskite type piezoelectric ceramics. In the preparation method, a precursor is synthesized by the following steps: weighing, mixing and grinding B-site ion oxides except ZrO2 and TiO2 in stoichiometric ratio; and finally cofiring to obtain the precursor. The method disclosed by the invention has an obvious advantage in preparation of PZN based three-element and multi-element composite perovskite type piezoelectric ceramics, and can effectively inhibit the formation of pyrochlore phase in the PZN based ceramic preparation process, thereby improving the PZN content of a solid solution and obtaining perovskite ceramics.

Description

technical field [0001] The invention relates to a preparation method of piezoelectric ceramics. Specifically, the invention relates to a method for preparing a lead niobate zincate (PZN)-based multi-element composite perovskite piezoelectric ceramic. Background technique [0002] In the past decade, new relaxor ferroelectric materials have attracted great attention due to their excellent piezoelectric properties. The most widely studied and most widely used is the relaxor ferroelectric with lead-based composite perovskite structure. This type of ferroelectric has the general formula Pb(B'B")O 3 , where the B-site atom has two kinds of occupancy, B′=Zn 2+ , Mg 2+ , Fe 3+ , Sc 3+ ..., B〞=Nb 5+ , Ta 5+ , W 6+ .... Among them, the typical relaxor ferroelectrics, lead magnesium niobate-lead titanate (PMN-PT) and lead niobate zincate-lead titanate (PZN-PT), have excellent piezoelectric properties (d 33 ~2000pC / N), electromechanical coupling performance (K 33 ~90%) and e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/495C04B35/622
Inventor 艾辽东龙西法
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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