High electrostrictive strain lead-free piezoelectric material under low electric field driving and preparing method

A lead-free piezoelectric and driver technology, used in piezoelectric/electrostrictive/magnetostrictive devices, circuits, electrical components, etc., to achieve the effects of excellent fatigue resistance, superior strain performance, and easy synthesis and sintering

Active Publication Date: 2017-01-11
LIAOCHENG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the current research on the electrostrain of BNT-based lead-free piezoelectric materials, the applied electric field required to achieve high electrostrain is relatively large, usually above 70kV / cm, which is higher than the electric field required by the current traditional lead-based materials. much, almost twice as much

Method used

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  • High electrostrictive strain lead-free piezoelectric material under low electric field driving and preparing method
  • High electrostrictive strain lead-free piezoelectric material under low electric field driving and preparing method
  • High electrostrictive strain lead-free piezoelectric material under low electric field driving and preparing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Preparation of (0.935-x) (Bi 0.5 Na 0.5 )TiO 3 -0.065BaTiO 3 -xA 2 BYZGR 6 Lead-free piezoelectric material, wherein, A=Pr, B=Ni, x=0.002, 0.004, 0.006, 0.007, 0.008, 0.009, 0.010, 0.012.

[0063] By Bi 2 o 3 、Na 2 CO 3 、TiO 2 、BaCO 3 、Pr 6 o 11 , NiO and MnO 2 (analytical pure) as raw material, according to (0.935-x) (Bi 0.5 Na 0.5 )TiO 3 -0.065BaTiO 3 -xPr 2 NiMnO 6 The stoichiometric ratio (molar ratio) of Bi, Na, Ti, Ba, Pr, Ni and Mn in (x=0.002, 0.004, 0.006, 0.007, 0.008, 0.009, 0.010, 0.012) Weigh the raw material, use dehydrated alcohol as medium and use ZrO 2 The balls were milled in a polytetrafluoroethylene ball mill jar for 24 hours, wherein the ball milling speed was 100-150 rpm, the mass ratio of the added zirconia balls to the ball milling material was 1.8:1, and the added anhydrous ethanol and ball milling material The mass ratio is 2.3:1. Then, dry, press into blocks and place in a closed Al 2 o 3 In the crucible, it was pre-fir...

Embodiment 2

[0069] Preparation of (0.935-x) (Bi 0.5 Na 0.5 )TiO 3 -0.065BaTiO 3 -xA 2 BYZGR 6 Lead-free piezoelectric material, wherein, A=Sm, B=Ni, x=0.002, 0.004, 0.006, 0.007, 0.008, 0.009, 0.010, 0.012.

[0070] By Bi 2 o 3 、Na 2 CO 3 、TiO 2 、BaCO 3 、Sm 2 o 3 , NiO and MnO 2 (analytical pure) as raw material, according to (0.935-x) (Bi 0.5 Na 0.5 )TiO 3 -0.065BaTiO 3 -xSm 2 NiMnO 6 The stoichiometric ratio (molar ratio) of Bi, Na, Ti, Ba, Sm, Ni and Mn in (x=0.002, 0.004, 0.006, 0.007, 0.008, 0.009, 0.010, 0.012) Weigh raw materials, use dehydrated alcohol as medium and use ZrO 2 The balls were milled in a polytetrafluoroethylene ball mill jar for 15 hours, wherein the ball milling speed was 100-150 rpm, the mass ratio of the added zirconia balls to the ball milling material was 1.5:1, and the added anhydrous ethanol and ball milling material The mass ratio is 2.0:1. Then, dry, press into blocks and place in a closed Al 2 o 3 In the crucible, it was pre-fired a...

Embodiment 3

[0074] Preparation of (0.935-x) (Bi 0.5 Na 0.5 )TiO 3 -0.065BaTiO 3 -xA 2 BYZGR 6 Lead-free piezoelectric material, wherein, A=Eu, B=Ni, x=0.002, 0.004, 0.006, 0.007, 0.008, 0.009, 0.010, 0.012.

[0075] By Bi 2 o 3 、Na 2 CO 3 、TiO 2 、BaCO 3 、Eu 2 o 3 , NiO and MnO 2 (analytical pure) as raw material, according to (0.935-x) (Bi 0.5 Na 0.5 )TiO 3 -0.065BaTiO 3 -xEu 2 NiMnO 6 The stoichiometric ratio (molar ratio) of Bi, Na, Ti, Ba, Eu, Ni and Mn in (x=0.002, 0.004, 0.006, 0.007, 0.008, 0.009, 0.010, 0.012) Weigh raw materials, use dehydrated alcohol as medium and use ZrO 2 The balls were milled in a polytetrafluoroethylene ball mill jar for 24 hours, wherein the ball milling speed was 100-150 rpm, the mass ratio of the added zirconia balls to the ball milling material was 1.8:1, and the added anhydrous ethanol and ball milling material The mass ratio is 2.5:1. Then, dry, press into blocks and place in a closed Al 2 o 3 In the crucible, it was pre-fired a...

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Abstract

The invention provides a high electrostrictive strain lead-free piezoelectric material under low electric field driving, of which chemical component conforms to a general chemical formula: (0.935-(i)*( / i))(BiO.5Na0.5)TiO3-0.065BaTi03-(i)( / i)A2BMn06, wherein A is a rare earth element, B is chosen from one or two of Ni and Co, value range of (i)*( / 1) is 0< (i)*( / i) is 0.015 or below. The invention further provides a preparing method of the high electrostrictive strain lead-free piezoelectric material under low electric field driving and an application thereof. The high electrostrictive strain lead-free piezoelectric material under low electric field driving can achieve high electrostrictive strain under low electric field driving, and meanwhile has excellent fatigue resistance property, and can be widely applied to aspects in a piezoelectric actuator, a displacement controller and the like.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and relates to a high-electric-induced-strain lead-free piezoelectric material driven by a low electric field and a preparation method thereof. Background technique [0002] The electrostrain effect is actually an inverse piezoelectric effect. When an external excitation (such as an electric field) is given to the dielectric, the electrolyte will deform and produce a certain amount of strain. Use S=dE to represent the electrical strain, where d represents the piezoelectric gauge coefficient, representing the conversion relationship between electrical energy and mechanical force. At present, the piezoelectric actuators produced in the industry are basically PZT-based materials, but due to the large side effects of PZT-based materials on the environment, it is not conducive to the requirements of sustainable development of human beings. Therefore, the development of materials that are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/475C04B35/622H01L41/187
CPCC04B35/475C04B35/622C04B2235/96C04B2235/3279C04B2235/3232C04B2235/3262C04B2235/3215C04B2235/3224C04B2235/3201H10N30/853
Inventor 郝继功徐志军初瑞清李伟付鹏
Owner LIAOCHENG UNIV
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