Lead-free calcium barium zirconate titanate piezoelectric ceramics and preparation method thereof

A barium calcium zirconate titanate, lead-free piezoelectric technology, applied in the direction of piezoelectric/electrostrictive/magnetostrictive devices, circuits, electrical components, etc., can solve environmental pollution and other problems, achieve great application potential and preparation process Stable, reliable, performance-improving effects

Inactive Publication Date: 2011-01-05
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problem that existing piezoelectric ceramics cause pollution to the environment in the process of use and disposal due to lead, and to improve the piezoelect

Method used

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  • Lead-free calcium barium zirconate titanate piezoelectric ceramics and preparation method thereof
  • Lead-free calcium barium zirconate titanate piezoelectric ceramics and preparation method thereof
  • Lead-free calcium barium zirconate titanate piezoelectric ceramics and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The composition of this example is (1-x)Ba(Ti 0.8 Zr 0.2 )O 3 -x(Ba 0.7 Ca 0.3 )TiO 3 , where x=0.45.

[0019] The first step is to prepare BaTiO 3 , BaZrO 3 and CaTiO 3 powder; preparation of BaTiO 3 Powder: let n represent the amount of substance to analyze pure BaCO 3 、TiO 2 As raw material, according to n(BaCO 3 ):n(TiO 2 )=1:1 Weighing ingredients, ball milling in anhydrous ethanol medium for 12h, drying the powder at 50°C for 14h, pre-calcining at 1100°C for 4h to obtain BaTiO 3 powder; preparation of BaZrO 3 Powder: Analytical pure BaCO 3 , ZrO 2 As raw material, according to n(BaCO 3 ):n(ZrO 2 )=1:1 Weighing ingredients, ball milling in anhydrous ethanol medium for 12h, after drying the powder at 50°C for 14h, pre-calcining at 1100°C for 4h, to obtain BaZrO 3 powder; preparation of CaTiO 3 Powder: to analyze pure CaCO 3 、TiO 2 As raw material, according to n(CaCO 3 ):n(TiO 2 )=1:1 Weighing ingredients, ball milling in anhydrous ethanol med...

Embodiment 2

[0025] The composition of this example is (1-x)Ba(Ti 0.8 Zr 0.2 )O 3 -x(Ba 0.7 Ca 0.3 )TiO 3 , where x=0.50.

[0026] The first step is to prepare BaTiO 3 , BaZrO 3 and CaTiO 3 powder; preparation of BaTiO 3 Powder: let n represent the amount of substance to analyze pure BaCO 3 、TiO 2 As raw material, according to n(BaCO 3 ):n(TiO 2 )=1:1 Weighing the ingredients, ball milling in absolute ethanol medium for 12h, drying the powder at 60°C for 8h, pre-calcining at 1200°C for 2h, to obtain BaTiO 3 powder; preparation of BaZrO 3 Powder: Analytical pure BaCO 3 , ZrO 2 As raw material, according to n(BaCO 3 ):n(ZrO 2 )=1:1 Weighing ingredients, ball milling in absolute ethanol medium for 12h, after drying the powder at 60°C for 8h, pre-calcining at 1200°C for 2h, to obtain BaZrO 3 powder; preparation of CaTiO 3 Powder: to analyze pure CaCO 3 、TiO 2 As raw material, according to n(CaCO 3 ):n(TiO 2 )=1:1 Weighing ingredients, ball milling in anhydrous ethanol me...

Embodiment 3

[0032] The composition of this example is (1-x)Ba(Ti 0.8 Zr 0.2 )O 3 -x(Ba 0.7 Ca 0.3 )TiO 3 , where x=0.55.

[0033] The first step is to prepare BaTiO 3 , BaZrO 3 and CaTiO 3 powder; preparation of BaTiO 3 Powder: let n represent the amount of substance to analyze pure BaCO 3 、TiO 2 As raw material, according to n(BaCO 3 ):n(TiO 2 )=1:1 Weighing the ingredients, ball milling in absolute ethanol medium for 12h, drying the powder at 50°C for 20h, pre-calcining at 1000°C for 6h to obtain BaTiO 3 powder; preparation of BaZrO 3 Powder: Analytical pure BaCO 3 , ZrO 2 As raw material, according to n(BaCO 3 ):n(ZrO 2 )=1:1 Weighing ingredients, ball milling in anhydrous ethanol medium for 12h, after drying the powder at 50°C for 20h, pre-calcining at 1000°C for 6h, to obtain BaZrO 3 powder; preparation of CaTiO 3 Powder: to analyze pure CaCO 3 、TiO 2 As raw material, according to n(CaCO 3 ):n(TiO 2 )=1:1 Weighing ingredients, ball milling in anhydrous ethanol ...

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Abstract

The invention discloses lead-free calcium barium zirconate titanate piezoelectric ceramics and a preparation method thereof. The invention is characterized in that: the material composition is (1-x)Ba(Ti0.8Zr0.2)O3-x(Ba0.7Ca0.3)TiO3, wherein x=0.45 to 0.60; in the method, the (1-x)Ba(Ti0.8Zr0.2)O3-x(Ba0.7Ca0.3)TiO3 ceramics are prepared by a two-step presintering method. The lead-free calcium barium zirconate titanate piezoelectric ceramics have a main crystalline phase of a perovskite phase, have better piezoelectric property, the piezoelectric constants d33 of more than 240 pC/N, and the mechanical coupling factors kp of more than 0.40. The lead-free calcium barium zirconate titanate piezoelectric ceramics have higher piezoelectric constant, achieve the properties of the conventional lead-containing piezoelectric ceramics, have a stable and reliable preparation process, and have better application prospect.

Description

technical field [0001] The invention relates to the technical field of piezoelectric ceramic materials, in particular to barium calcium zirconate titanate lead-free piezoelectric ceramics and a preparation method thereof. Background technique [0002] Piezoelectric ceramic materials refer to ferroelectric ceramic materials with piezoelectric effect after DC high voltage polarization, which are widely used in piezoelectric ceramic resonators, piezoelectric filters, piezoelectric buzzers, ultrasonic transducers and piezoelectric Electronic components such as ceramic transformers. Among the traditional piezoelectric ceramic materials, the most widely used and mature is lead-containing Pb(Zr,Ti)O 3 (abbreviated as PZT)-based polycrystalline materials, but the main component of PZT ceramics is PbO, and the melting point of PbO is 889 ° C, which is a volatile toxic substance, which causes serious problems of lead pollution. With the emphasis on environmental protection, lead-fre...

Claims

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Application Information

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IPC IPC(8): C04B35/49C04B35/622H01L41/187
Inventor 高峰刘亮亮许贝王涛
Owner NORTHWESTERN POLYTECHNICAL UNIV
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