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Crystal orientation template for BaTiO3-based lead-free piezoelectric ceramics and method for fabricating the same

A lead-free piezoelectric and crystal orientation technology, which is applied in the field of templates for crystal orientation and its preparation, can solve problems such as improving the piezoelectric characteristics of piezoelectric ceramics, and achieve the effects of reducing tissue defects and high displacement characteristics

Inactive Publication Date: 2017-03-22
KOREA INST OF MASCH & MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the difference in the composition ratio of the matrix material used to prepare BT-based ceramics and the chemical composition ratio of the template for crystal orientation causes the template to play a role like a defect, which is limited in improving the piezoelectric characteristics of piezoelectric ceramics, There is therefore an urgent need to develop remedies

Method used

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  • Crystal orientation template for BaTiO3-based lead-free piezoelectric ceramics and method for fabricating the same
  • Crystal orientation template for BaTiO3-based lead-free piezoelectric ceramics and method for fabricating the same
  • Crystal orientation template for BaTiO3-based lead-free piezoelectric ceramics and method for fabricating the same

Examples

Experimental program
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preparation example Construction

[0057] The preparation method of lead-free piezoelectric ceramics for crystal orientation according to the present invention comprises the following steps: (a) carrying out the first mixture comprising titanium oxide and the oxide of element A (however, A is Zr or Sn) for the first time Heat treatment to prepare titanium / element A solid solution oxide powder; (b) perform a second heat treatment on the second mixture comprising the above titanium / element A solid solution oxide powder, bismuth oxide and mixed salt to prepare a plate-shaped template precursor and (c) performing a third heat treatment on the third mixture comprising the above-mentioned plate-shaped template precursor and barium precursor to prepare a plate-shaped template represented by the following chemical formula 1:

[0058] [chemical formula 1]

[0059] Ba(Ti 1-x A x )O 3

[0060] (However, A is Zr or Sn, 0

[0061] Next, by using Ba(Ti 0.9 Zr 0.1 )O 3 The preparation method of the template for ...

Embodiment 1

[0104] (1) contains (Ti 0.9 Zr 0.1 )O 2 Preparation of solid solution powder

[0105] Weigh titanium dioxide (TiO 2 ), zirconia (ZrO 2 ) raw material powder and use zirconia balls and ethanol as a solvent to crush, dry and put it into an alumina crucible, then heat-treat at 1200°C for 4 hours to make a solid solution powder, and perform X-ray diffraction analysis on the prepared solid solution powder and display the results in the figure 1 .

[0106] Such as figure 1 As shown, for the titanium dioxide powder ( figure 1 (b)) and titanium dioxide raw material powder ( figure 1 (c)) X-ray diffraction analysis results are compared to confirm that the prepared solid solution powder ( figure 1 (a)) is a solid solution of zirconium (Ti 0.9 Zr 0.1 )O 2 Composition ratio of solid solution powder.

[0107] (2) Contains Bi 4 (Ti 0.9 Zr 0.1 )O 12 Preparation of template precursors

[0108] To prepare the template precursor, 3 moles of (Ti 0.9 Zr 0.1 )O 2 Solid solutio...

Embodiment 2

[0119] Except for the second heat treatment at 900 °C for 1 h in the template precursor preparation step and the use of 7 moles of barium carbonate (BaCO 3 , 99%), other parts have utilized the same method as in Example 1 to make templates.

[0120] Furthermore, X-ray diffraction analysis and scanning electron microscope analysis were carried out on the prepared template, and the results are shown in Figure 4 .

[0121] Such as Figure 4 As shown in (a), no additional second phase (second dphase) was detected, such as Figure 4 As shown in (b), it was confirmed that a uniform plate-shaped template of a certain size was formed.

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Abstract

The invention discloses a crystal orientation template for BaTiO3-based lead-free piezoelectric ceramics represented by formula 1: Ba(Ti1-xAx)O3 (wherein, A is Zr or Sn, 0<x<1). According to the crystal orientation template for BaTiO3-based lead-free piezoelectric ceramics, zirconium or tin is melted, so that the composition ratio is similar to base material for preparing the BaTiO3-based lead-free piezoelectric ceramics, and the structural defects can be reduced. The BaTiO3-based lead-free piezoelectric ceramics with high displacement properties can be manufactured through crystal orientation.

Description

technical field [0001] The present invention relates to a kind of BaTiO 3 A template for crystal orientation of lead-free piezoelectric ceramics and a preparation method thereof. Background technique [0002] The development of the electronics industry is largely due to the component materials used as its materials, and the development of component materials leads the electronics industry. Among them, piezoelectric ceramics are materials that generate voltage when subjected to pressure and mechanically deform when subjected to an electric field. Many studies have been conducted in view of their diverse applications in the electronic field. [0003] Pb(Zr,Ti)O with excellent piezoelectric properties in the prior art 3 PZT-based piezoelectric ceramics with high composition ratio are used in a wide range of fields such as ultrasonic equipment, video equipment, audio equipment, communication equipment, and sensors. [0004] However, since the above-mentioned PZT-based piezoel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/468C04B35/622
Inventor 全在昊车贤爱
Owner KOREA INST OF MASCH & MATERIALS
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