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Modified lead zirconate titanate powder and preparation method thereof as well as piezoelectric ceramic forming blank

A lead zirconate titanate and piezoelectric ceramic technology, applied in the field of piezoelectric ceramics, can solve the problems of cracks and pores, difficult to form piezoelectric ceramics, low density, etc., and achieves good surface finish, good resin compatibility, Excellent rheological properties

Active Publication Date: 2018-04-20
GUANGDONG UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the light-curing molding technology has higher requirements on ceramic powders. The piezoelectric ceramics prepared by 3D printing using existing ceramic powders are difficult to form, and have low density, and the sintered samples have defects such as deformation, cracking and many pores. , so the poor electrical performance hinders the practical application

Method used

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  • Modified lead zirconate titanate powder and preparation method thereof as well as piezoelectric ceramic forming blank
  • Modified lead zirconate titanate powder and preparation method thereof as well as piezoelectric ceramic forming blank
  • Modified lead zirconate titanate powder and preparation method thereof as well as piezoelectric ceramic forming blank

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preparation example Construction

[0042] The invention provides a preparation method of modified lead zirconate titanate powder, comprising the following steps:

[0043] A) According to the molar ratio of Pb in the chemical formula shown in formula I: Nb: Ni: Zr: Ti=(1-y-z): y: z: a: (1-a) Weigh ZrO 2 、TiO 2 , Pb 3 o 4 , NiO and NbO are mixed to obtain a mixture;

[0044] B) performing ball milling, rotary evaporation and drying on the mixture in the step A) in sequence to obtain an intermediate;

[0045] C) sintering the intermediate to obtain lead zirconate titanate powder having the chemical formula shown in formula I;

[0046] Pb 1-y-z Nb y Ni z (Zr a Ti 1-a )O 3 Formula I;

[0047] Wherein, 0

[0048] In the present invention, the values ​​of y, z and a are consistent with the value ranges above, and will not be repeated here.

[0049] In the present invention, the mixture is preferably placed in a polytetrafluoroethylene ball mill jar, and grinding balls and gr...

Embodiment 1

[0075] Synthesize Pb as follows 0.92 Nb 0.05 Ni 0.03 (Zr 0.52 Ti 0.48 )O 3 Powder.

[0076] (1) According to the molar ratio of each element of the modified lead zirconate titanate powder to be synthesized Zr:Ti:Pb:Nb:Ni:=0.52:0.48:0.92:0.05:0.03, weigh ZrO 2 、TiO 2 and Pb 3 o 4 The main component raw materials are mixed with NiO and NbO modification additives to obtain a mixture one.

[0077] (2) Place the mixture one described in feature (1) in a polytetrafluoroethylene ball mill jar, add zirconia grinding balls and absolute ethanol, the mass ratio is: mixture one: ball milling medium: water=100%: 300%: 15%, using 350r / min speed ball milling for 3 hours to obtain the mixture two.

[0078] (3) Use a rotary evaporator to evaporate absolute ethanol from mixture 2 described in feature (2), and then place evaporated mixture 3 in an oven at 60° C. for 8 hours to dry to obtain mixture 4.

[0079] (4) Put the mixture described in feature (3) in a closed alumina crucible, ...

Embodiment 2

[0081] Synthesize Pb as follows 0.92 Nb 0.05 Ni 0.03 (Zr 0.60 Ti 0.40 )O 3 Powder.

[0082](1) According to the molar ratio of each element of the modified lead zirconate titanate powder to be synthesized Zr:Ti:Pb:Nb:Ni:=0.60:0.40:0.92:0.05:0.03, weigh ZrO 2 、TiO 2 and Pb 3 o 4 The main component raw materials are mixed with NiO and NbO modification additives to obtain a mixture one.

[0083] (2) Place the mixture one described in feature (1) in a polytetrafluoroethylene ball mill jar, add zirconia grinding balls and absolute ethanol, the mass ratio is: mixture one: ball milling medium: water=100%: 300%: 15%, using 350r / min speed ball milling for 5 hours to obtain the mixture two.

[0084] (3) Use a rotary evaporator to evaporate absolute ethanol from the mixture 2 described in feature (2), and then place the evaporated mixture 3 in an oven at 80°C for 6 hours to dry to obtain the mixture 4.

[0085] (4) Put the mixture described in feature (3) in a closed alumina c...

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Abstract

The invention provides modified lead zirconate titanate powder which has a chemical formula shown in a formula I: Pb1-y-zNbyNiz(ZraTil-a)O3, wherein y is more than 0 but less than or equal to 0.08, zis more than 0 but less than or equal to 0.08, and a is more than 0.51 but less than or equal to 0.6. The modified lead zirconate titanate powder provided by the invention has the beneficial effects that the lead zirconate titanate powder is modified through NiO and NbO, so that the obtained modified lead zirconate titanate powder has high compatibility with a resin material; and forming is easierin the stereo light curing process, so that a complex structure is formed. The invention further provides a preparation method of the modified lead zirconate titanate powder and a piezoelectric ceramic forming blank.

Description

technical field [0001] The invention belongs to the technical field of piezoelectric ceramics, and in particular relates to a modified lead zirconate titanate powder, a preparation method thereof and a molded body of piezoelectric ceramics. Background technique [0002] Piezoelectric ceramics are information functional ceramic materials that can convert mechanical energy and electrical energy into each other, and are an important part of information functional materials. Because of its high electromechanical coupling coefficient, low price, and easy mass production, it has been widely used in communication, acoustics, optics and other aspects. For example, ceramic filters, ceramic discriminators and ceramic attenuators used in communication equipment; underwater acoustic transducers and fish detectors used in underwater communication and detection; speakers used in electroacoustic devices, In addition, there are many devices used in precision measurement, navigation, ultras...

Claims

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Application Information

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IPC IPC(8): C04B35/493C04B35/626C04B26/06C04B26/14C04B26/16C04B26/18C04B26/10
CPCC04B26/06C04B26/14C04B26/16C04B26/18C04B35/493C04B35/6261C04B35/62615C04B35/62645C04B35/62655C04B35/62675C04B2235/3251C04B2235/3279C04B24/282C04B24/008C04B2103/408C04B14/36
Inventor 陈燕伍尚华包秀兰蒋强国姜知水欧明文理
Owner GUANGDONG UNIV OF TECH
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