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Sodium bismuth titanate piezoelectric/electrostriction lead-free ceramic material, preparation method and application thereof

A technology of sodium bismuth titanate and ceramic materials, applied in the field of piezoelectric/electrostrictive ceramics, can solve the problems of unreported piezoelectric properties, achieve high electrostrain characteristics, low energy consumption, and simple operation

Inactive Publication Date: 2018-12-07
YANTAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when studying the phenomenon of BNT-based large electric strain, due to the enhancement of structural symmetry, researchers have not reported the piezoelectric properties of the corresponding materials.

Method used

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  • Sodium bismuth titanate piezoelectric/electrostriction lead-free ceramic material, preparation method and application thereof
  • Sodium bismuth titanate piezoelectric/electrostriction lead-free ceramic material, preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0050] This embodiment provides a bismuth sodium titanate based piezoelectric-electrostrictive lead-free ceramic material, the chemical composition of the ceramic material is:

[0051] (1- x )(Bi 0.5 Na 0.5 )0.935 Ba 0.065 Ti 0.985 (Fe 0.5 Sb 0.5 ) 0.015 o 3 - x SrFeCo 0.5 o y ,in x =0.004.

[0052] The preparation method of bismuth sodium titanate-based piezoelectric / electrostrictive lead-free ceramic material provided in this embodiment includes the following steps:

[0053] Chemically pure or analytically pure Na 2 CO 3 、BaCO 3 , Fe 2 o 3 , Sb 2 o 3 、TiO 2 、 Bi 2 o 3 and SrFeCo 0.5 o y as raw material, weighed by stoichiometric ratio (assuming that the synthesis final product of this embodiment is 0.2mol, then the number of moles of each raw material required is respectively Na 2 CO 3 / BaCO 3 / Fe 2 o 3 / Sb 2 o 3 / TiO 2 / Bi 2 o 3 / SrFeCo 0.5 o y = 0.046563 / 0.012948 / 0.000747 / 0.000747 / 0.196212 / 0.046563 / 0.008; the calculation and...

Embodiment 2

[0057] This embodiment provides a bismuth sodium titanate based piezoelectric / electrostrictive lead-free ceramic material, the chemical composition of the ceramic material is:

[0058] (1- x )(Bi 0.5 Na 0.5 ) 0.935 Ba 0.065 Ti 0.985 (Fe 0.5 Sb 0.5 ) 0.015 o 3 - x SrFeCo 0.5 o y ,in x =0.008.

[0059] Chemically pure or analytically pure Na 2 CO 3 、BaCO 3 , Fe 2 o 3 , Sb 2 o 3 、TiO 2 、 Bi 2 o 3 and SrFeCo 0.5 o y As raw material, weighed according to the stoichiometric ratio, batched according to the conventional solid-phase synthesis method, mixed by ball milling for 8 hours, dried, shaped, sintered at 1050°C for 3 hours, and formed bismuth sodium titanate-based piezoelectric / electrostrictive lead-free ceramic materials .

[0060] The obtained bismuth-sodium titanate-based piezoelectric / electrostrictive lead-free ceramic material is cleaned by a silver electrode after ultrasonic cleaning. Test the electrostrictive coefficient of fresh samples at room...

Embodiment 3

[0063] This embodiment provides a bismuth sodium titanate based piezoelectric / electrostrictive lead-free ceramic material, the chemical composition of the ceramic material is:

[0064] (1- x )(Bi 0.5 Na 0.5 ) 0.935 Ba 0.065 Ti 0.985 (Fe 0.5 Sb 0.5 ) 0.015 o 3 - x SrFeCo 0.5 o y ,in x =0.012.

[0065] Chemically pure or analytically pure Na 2 CO 3 、BaCO 3 , Fe 2 o 3 , Sb 2 o 3 、TiO 2 、 Bi 2 o 3 and SrFeCo 0.5 o y As raw material, weighed according to the stoichiometric ratio, batched according to the conventional solid-phase synthesis method, mixed by ball milling for 8 hours, dried, shaped, sintered at 1050°C for 3 hours, and formed bismuth sodium titanate-based piezoelectric / electrostrictive lead-free ceramic materials .

[0066] The obtained bismuth-sodium titanate-based piezoelectric / electrostrictive lead-free ceramic material is cleaned by a silver electrode after ultrasonic cleaning. Test the electrostrictive coefficient of fresh samples at room...

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Abstract

The invention provides a sodium bismuth titanate piezoelectric / electrostriction lead-free ceramic material and relates to the technical field of sodium bismuth titanate piezoelectric / electrostrictionceramics. The chemical constitution of the sodium bismuth titanate piezoelectric / electrostriction lead-free ceramic material is (1-x) (Bi0.5Na0.5) 0.935Ba0.065Ti0.985(Fe0.5Sb0.5)0.015O(3-x)SrFeCo0.5Oy, wherein x=0.000-0.015. The sodium bismuth titanate piezoelectric / electrostriction lead-free ceramic material provided by the invention has high piezoelectric constant d33(>200pC / N) and high electrostriction coefficient Q33(>0.02m<4> / C<2>), is free from harmful element Pb, meets the requirement of environment-friendly material and has an excellent application prospect in the fields of transducers, drivers, high-precision displacement sensors, and the like.

Description

technical field [0001] The invention relates to the technical field of piezoelectric / electrostrictive ceramics, in particular to a bismuth sodium titanate-based piezoelectric / electrostrictive lead-free ceramic material and a preparation method and application thereof. Background technique [0002] In the electromechanical systems and devices of automatic control, the driver is often one of the most critical factors limiting its performance and life. Among many actuators, piezoelectric / electrostrictive actuators have attracted much attention due to their fast response, high load capacity, low energy consumption, and low price. At present, piezoelectric / electrostrictive actuators have been successfully applied in many fields such as optics, aerospace, and precision positioning, and are forming an industry with great potential. [0003] The widely used electrostrictive materials are lead-based relaxor ferroelectric materials, including Pb(Zn 1 / 3 Nb 2 / 3 )O 3 (PZN) (Fan Huiqi...

Claims

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Application Information

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IPC IPC(8): C04B35/475C04B35/622C04B35/624
CPCC04B35/475C04B35/622C04B35/624C04B2235/3272C04B2235/3275C04B2235/3294C04B2235/442C04B2235/443C04B2235/96
Inventor 徐志军初瑞清贺笑春
Owner YANTAI UNIV
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