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Piezoceramic material with high piezoelectric modulus and high electrostriction under low temperature sintering and preparation method thereof

A technology of piezoelectric ceramics and electrostrain, applied in the field of piezoelectric materials, can solve the problems that cannot meet the application requirements of laminated piezoelectric filters, laminated piezoelectric micro-displacers and laminated piezoelectric transformers, and achieve good application foreground effect

Active Publication Date: 2012-07-18
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

On the other hand, there are very few studies on electrostrain performance in current reports, which cannot meet the application requirements of laminated piezoelectric filters, laminated piezoelectric microdisplacers, and laminated piezoelectric transformers.

Method used

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  • Piezoceramic material with high piezoelectric modulus and high electrostriction under low temperature sintering and preparation method thereof
  • Piezoceramic material with high piezoelectric modulus and high electrostriction under low temperature sintering and preparation method thereof
  • Piezoceramic material with high piezoelectric modulus and high electrostriction under low temperature sintering and preparation method thereof

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preparation example Construction

[0032] Regarding the preparation of the above-mentioned piezoelectric ceramic material of the present invention, first, Pb 3 o 4 (industrial pure), ZrO 2 (industrial pure), TiO 2 (industrial pure), Nb 2 o 5 (chemically pure), MgCO 3 ·5H 2 O (industrial pure), SrCO 3 (analytical pure) and BaCO 3 (Analytical pure) Weighing according to stoichiometry, the specific proportion is according to the general formula Pb 1-x-y Sr x Ba y (Mg 1 / 3 Nb 2 / 3 ) 0.25 Ti 0.40 Zr 0.35 o 3 (0.02≤x≤0.06, 0.02≤y≤0.06) to calculate. The above raw materials are commercially available products or compounds prepared in the laboratory according to conventional methods.

[0033]The raw materials can be mixed evenly and reach the required fineness by wet grinding. In the present invention, the ball milling medium is preferably agate balls, but it is not limited thereto, and other media such as natural pebbles can also be used. In one embodiment, the ratio of material, agate ball, and deion...

Embodiment 1

[0049] with Pb 3 o 4 (industrial pure), ZrO 2 (industrial pure), TiO 2 (industrial pure), Nb 2 o 5 (chemically pure), MgCO 3 ·5H 2 O (industrial pure), SrCO 3 (analytical pure), BaCO 3 (analytical pure) as raw material, according to Pb 0.92 Sr 0.06 Ba 0.02 (Mg 1 / 3 Nb 2 / 3 ) 0.25 Ti 0.40 Zr 0.35 o 3 Stoichiometric weighing, using deionized water and agate balls as medium, mixed according to the ratio of mixed raw materials: agate balls: deionized water = 1: 1.2: 0.8, mixed for 8 hours through a drum ball mill; pour the mixed raw materials Put it into a container and put it in an oven for drying, then briquette it, and synthesize it in two stages: first, keep it at a temperature of 650°C for 1 hour, and then hold it at a temperature of 850°C for 2 hours; lead magnesium oxide-lead zirconate titanate, and grind the synthesized block into powder; the sintering aid raw material CuO is 0.92 Sr 0.06 Ba 0.02 (Mg 1 / 3 Nb 2 / 3 ) 0.25 Ti 0.40 Zr 0.35 o 3 +0.25wt.% C...

Embodiment 2

[0052] According to Pb 0.92 Sr 0.06 Ba 0.02 (Mg 1 / 3 Nb 2 / 3 ) 0.25 Ti 0.40 Zr 0.35 o 3 +0.5wt.%CuO proportioning, the specific preparation process is as embodiment 1, the main performance of gained standard sheet is: S 11 =1.5‰(1.5kV / mm)d 33 =519pC / N, ε 33 T / ε o =2463. figure 2 The dielectric thermograms of the components described in this example are given, Figure 4 The unipolar electric strain curves of the components described in this example are given, Figure 6 The microscopic morphology of the components described in this example is given.

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Abstract

The invention relates to a piezoceramic material with high piezoelectric modulus and high electrostriction under low temperature sintering. In the components of the piezoceramic material provided by the invention, lead magnesium niobate-lead zirconate titanate compositely doped and modified by strontium and barium is adopted as a matrix, and CuO also exists. By selecting an appropriate preparation process, an appropriate ratio of Zr to Ti, an appropriate doping amount of the strontium and the barium and an appropriate sintering assistant, the densified piezoceramic material with high piezoelectric modulus and high electrostriction properties and piezoelectric elements are prepared under the condition of lowering the sintering temperature. The piezoceramic material has a promising application prospect in stacked piezoelectric filters, stacked piezoelectric micro-displacement machines, stacked piezoelectric transformers and the like.

Description

technical field [0001] The invention relates to the technical field of piezoelectric materials, in particular to a piezoelectric ceramic material with high piezoelectric coefficient and high electrical strain sintered at low temperature and a preparation method thereof. Background technique [0002] Piezoelectric materials have a strain effect (conversion of electrical energy to mechanical energy) by applying an electric field from the outside and an effect of generating charges on the surface (conversion of mechanical energy to electrical energy) by external stress, and can be used for detection and storage of various information, etc. It has been widely used in technical fields such as military, automotive, commercial and medical. Such as lead zirconate titanate (Pb(Zr,Ti))O 3 ; PZT) and other piezoelectric materials, for the applied voltage can be 1 × 10 -10 A roughly proportional strain occurs in the m / V command, so it is possible to adjust minute positions. In additi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/49C04B35/622
Inventor 董显林王丽梁瑞虹
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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