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Preparation method of piezoelectric driver with nickle particle decentralization lithium doping by niobic acid kalium natrium

A potassium sodium niobate piezoelectric and piezoelectric driver technology, which is applied in the direction of piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, electrical components, etc., can solve problems such as interface peeling, and achieve improved Effects of mechanical properties, prolonging service life, and improving mechanical strength

Inactive Publication Date: 2009-08-19
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention uses lithium-doped potassium-sodium niobate piezoelectric ceramics as a matrix and metal nickel as a dispersed phase to provide a preparation method for a lithium-doped potassium-sodium niobate / nickel piezoelectric driver, which solves the problem of the traditional double-chip type driver. Interfacial peeling and cracking problems during the service process, while improving the mechanical properties of the piezoelectric ceramic substrate, effectively improving the service stability of the driver

Method used

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  • Preparation method of piezoelectric driver with nickle particle decentralization lithium doping by niobic acid kalium natrium
  • Preparation method of piezoelectric driver with nickle particle decentralization lithium doping by niobic acid kalium natrium

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Experimental program
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Effect test

Embodiment 1

[0019] Take the commercially available K 2 CO 3 Powder (Beijing Chemical Reagent Factory, purity 99%), Na 2 CO 3 Powder (Beijing Chemical Reagent Factory, purity 99.8%), Li 2 CO 3 Powder (Beijing Chemical Reagent Factory, purity 99.5%) and Nb 2 o 5 Powder (Jiangxi Yifeng Guizu Tantalum and Niobium Co., Ltd., purity 99.4%) is raw material, adopts atomic percentage according to chemical formula Li 0.06 (K 0.5 Na 0.5 ) 0.94 NbO 3 Perform batching, mixing, and roasting; grind and mix the synthesized lithium-doped potassium sodium niobate (LKNN) powder with Ni powder (Beijing Bailingwei Chemical Technology Co., Ltd., purity >99.9%, particle size ~325 mesh), and mix the powder according to the setting The composition and morphology of the material were laid layer by layer in the mold and molded; LKNN / 5%Ni / 40%Ni / 5%Ni / LKNN was sintered at 1060°C in a nitrogen protective atmosphere with an oxygen content of 0.5vol%. Five-layer composite disc-shaped products, the thickness of...

Embodiment 2

[0021] Take the commercially available K 2 CO 3 Powder (Beijing Chemical Reagent Factory, purity 99%), Na 2 CO 3 Powder (Beijing Chemical Reagent Factory, purity 99.8%), Li 2 CO 3 Powder (Beijing Chemical Reagent Factory, purity 99.5%) and Nb 2 o 5 Powder (Jiangxi Yifeng Guizu Tantalum and Niobium Co., Ltd., purity 99.4%) is raw material, adopts atomic percentage according to chemical formula Li 0.06 (K 0.5 Na 0.5 ) 0.94 NbO 3 Perform batching, mixing, and roasting; grind and mix the synthesized lithium-doped potassium sodium niobate (LKNN) powder with Ni powder (Beijing Bailingwei Chemical Technology Co., Ltd., purity >99.9%, particle size ~325 mesh), and mix the powder according to the setting The composition and morphology of the material were laid layer by layer in the mold and formed by compression molding; LKNN / 5%Ni / 40%Ni / 5%Ni / LKNN was prepared by sintering at 1030°C in a nitrogen protective atmosphere with an oxygen content of 0.0003vol%. Five-layer composite...

Embodiment 3

[0023] Take the commercially available K 2 CO 3 Powder (Beijing Chemical Reagent Factory, purity 99%), Na 2 CO 3 Powder (Beijing Chemical Reagent Factory, purity 99.8%), Li 2 CO 3 Powder (Beijing Chemical Reagent Factory, purity 99.5%) and Nb 2 o 5 Powder (Jiangxi Yifeng Guizu Tantalum and Niobium Co., Ltd., purity 99.4%) is raw material, adopts atomic percentage according to chemical formula Li 0.06 (K 0.5 Na 0.5 ) 0.94 NbO 3 Perform batching, mixing, and roasting; grind and mix the synthesized lithium-doped potassium sodium niobate (LKNN) powder with Ni powder (Beijing Bailingwei Chemical Technology Co., Ltd., purity >99.9%, particle size ~325 mesh), and mix the powder according to the setting The composition and morphology of the material were laid layer by layer in the mold and molded; LKNN / 10%Ni / 40%Ni / 10%Ni / LKNN was sintered at 1120°C in a nitrogen protective atmosphere with an oxygen content of 0.5vol%. Five-layer composite disc-shaped sample, the thickness of...

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Abstract

The invention discloses a preparation method for a piezoelectric actuator with nickel particle dispersed lithium doped potassium-sodium niobate and pertains to the technical field of the piezoelectric actuator. The oxide mixing method is adopted to compound lithium doped potassium-sodium niobate powder, metal nickel powder is added in a composition range of 1 to 40vol percent of Ni to obtain the compound powder of lithium doped potassium / sodium niobate with different contents, the powder is paved layer by layer in a mold and molded by compression according to the set gradient morphology of nickel composition, multi-layer composite materials of nickel particle dispersed lithium doped potassium-sodium niobate is prepared by agglomeration under controlled atmosphere. The protective atmosphere thereof contains 0.0003 to 0.5vol percent of oxygen and the air pressure is 1.1 to 2 atmospheric pressures. After the technical steps of cutting molding, coating silver electrode, pulling wires, polarization process and the like, a piezoelectric actuator of lithium doped potassium-sodium niobate is assembled, wherein, the thickness of each composite layer is 0.2 to 0.5 millimeter and the number of layers is 3 to 7. The preparation method reduces the interface stress concentration and cracking failure of traditional dual-chip type drivers and improves the chemical performance of the piezoelectric actuator.

Description

technical field [0001] The invention relates to a preparation method of a piezoelectric drive device with a functional gradient structure, which belongs to the technical field of piezoelectric drives, and in particular includes a micro drive applied to micro-displacement and micro-flow control. Background technique [0002] As a micro-displacement drive device, the piezoelectric actuator has the advantages of good linearity, convenient control, high displacement resolution, good frequency response, no noise, no electromagnetic interference, low voltage drive, and easy miniaturization. In the traditional bimorph piezoelectric actuator, the piezoelectric ceramic sheet and the elastic metal sheet are bonded by an organic binder (such as epoxy resin), and then heated and pressurized to form a composite material. This structural design has the inherent defects of interface stress concentration and thermal expansion mismatch, which leads to performance degradation problems such as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/00B22F3/16C04B35/495C04B35/622
Inventor 张海龙孔德才张波萍张永军
Owner UNIV OF SCI & TECH BEIJING
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