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Ternary system piezoceramic material and preparation method thereof

A technology of piezoelectric ceramics and ternary system, applied in the field of piezoelectric ceramic materials, can solve the problems that cannot meet the requirements of piezoelectric actuators, and achieve the effect of easy realization and simple preparation process steps

Active Publication Date: 2014-05-14
江西中竹生物质科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although this type of material has a high Curie temperature, piezoelectric constant, and high electromechanical coupling coefficient, the mechanical quality factor Qm of this type of material is relatively low, only about 50-100, which cannot meet the requirements of piezoelectric actuators, etc. Requirements for use in power devices

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] This embodiment is a piezoelectric ceramic material with high power and high Curie temperature in a ternary system, and the weight percentage of each component of the piezoelectric ceramic material is: wherein Pb(Mn 1 / 3 Sb 2 / 3 )O 3 7%, BiScO 3 The content is 21%, and the PbTiO3 content is 72%, which constitutes 0.07Pb(Mn 1 / 3 Sb 2 / 3 )O 3 The ternary system solid solution of -0.21BiScO3-0.72PbTiO3 composition; its preparation method mainly comprises the following steps:

[0024] Step 1: Preparation of starting powder: Bi 2 o 3 (99.5%), Sc 2 o 3 (99.99%), PbO (99.9%), TiO 2 (99.5%), Sb 2 o 3 (99.5%), MnO 2 (99.5%) are mixed after weighing according to the stoichiometric ratio;

[0025] Step 2: Ball milling and mixing the starting powder of Step 1 for 24 hours;

[0026] Step 3: Dry the super-primary powder mixed by ball milling in step 2 at 110°C for 4 hours, then pre-burn at 850°C for 2 hours;

[0027] Step 4: Grinding the pre-fired powder in Step 2 by ...

Embodiment 2

[0031] This embodiment is a ternary system high-power high-Curie temperature piezoelectric ceramic, and the percentage by weight of each component of the ceramic material is: wherein Pb (Yb 1 / 2 Nb 1 / 2 )O 3 8%, BiScO 3 The content is 34%, and the PbTiO3 content is 58%, which constitutes 0.08Pb(Mn 1 / 3 Sb 2 / 3 )O 3 The ternary system solid solution of -0.34BiScO3-0.58PbTiO3 composition, its preparation method mainly comprises the following steps:

[0032] Step 1: Preparation of starting powder: Bi 2 o 3 (99.5%), Yb 2 o 3 (99.99%), Nb 2 o 5 (99.9%), Sc 2 o 3(99.99%), TiO 2 (99.5%), PbO (99.99%) are mixed according to stoichiometric ratio weighing;

[0033] Step 2: Ball milling and mixing the starting powder of Step 1 for 20 hours;

[0034] Step 3: Dry the super-primary powder mixed by ball milling in step 2 at 80°C for 4 hours, then pre-burn at 800°C for 2 hours;

[0035] Step 4: The pre-fired powder in step 3 is ball milled for 24 hours twice, and then passed t...

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Abstract

The invention discloses a ternary system piezoceramic material which comprises xPb(Mn<1 / 3>Sb<2 / 3>) O<3>-(1-x-y) BiScO3-yPbTiO3 and xPb (Yb<1 / 2>Nb<1 / 2>) O<3>-(1-x-y) BiScO3-PbTiO3, wherein the content of x is 0.5-10mol%, and the content of y is 30-80mol%. The ternary system piezoceramic material has excellent piezoelectric property and high Curie temperature. Simultaneously the invention discloses a method for preparing the material. The method comprises enabling BiScO3 and PbTiO3 to serve as basic materials, adding Pb(Mn<1 / 3>Sb<2 / 3>) O<3> and Pb (Yb<1 / 2>Nb<1 / 2>) O<3>, forming ternary system solid solution, and then preparing a final ternary system ceramic block body by the ceramic material synthesis steps of ball-milling mixing, drying, presintering, grinding, forming and sintering and the like. The process is simple and easy to achieve.

Description

technical field [0001] The invention relates to a piezoelectric ceramic material, in particular to a piezoelectric functional ceramic material with high power and high Curie temperature, and a method for preparing the piezoelectric functional ceramic material. Background technique [0002] At present, piezoelectric ceramics used in piezoelectric actuators are usually various doped and modified Pb(Zr,Ti)O3 (PZT) ceramics, and their Curie temperature is only about 380°C near the quasi-isomorphic phase boundary. This limitation makes the use of the actuator unable to meet the requirements of large temperature difference and high radiation environment. [0003] Bi-based layered perovskite-like ferroelectric oxides are a well-known class of high Curie temperature ferroelectric materials, such as Bi 3 TiNbO 9 (BTN), its Curie temperature is as high as 940 o c. However, such materials have poor piezoelectric properties and are not suitable for use in power devices. The perovsk...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/472C04B35/622
Inventor 王一平杨颖钱王洁陈吉
Owner 江西中竹生物质科技有限公司