Bismuth-based leadless piezoelectric ceramic and piezoelectric actuator with application of material thereof

A piezoelectric actuator, lead-free piezoelectric technology, applied in the direction of piezoelectric/electrostrictive/magnetostrictive devices, circuits, electrical components, etc., can solve problems such as high driving electric field, achieve large output force and anti-fatigue Characteristics, effects of excellent drive performance

Active Publication Date: 2016-11-02
INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But from a practical point of view, there is still a typical problem in the application of this material-high driving electric field

Method used

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  • Bismuth-based leadless piezoelectric ceramic and piezoelectric actuator with application of material thereof
  • Bismuth-based leadless piezoelectric ceramic and piezoelectric actuator with application of material thereof
  • Bismuth-based leadless piezoelectric ceramic and piezoelectric actuator with application of material thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Table 1 gives the formulations of the 2 samples implemented in this example. The present invention uses analytically pure grade Bi 2 o 3 、Na 2 CO 3 、TiO 2 , SrCO 3 , and MnO 2 As the raw material, according to the chemical formula (1-x) Bi 0.5 Na 0.5 TiO 3 +xSrTiO 3 +ywt%MnO 2 , after weighing the raw materials, put them into a ball mill jar, use absolute ethanol as the medium, ball mill for 24 hours, put the obtained slurry into an oven for drying, pass through a 40-mesh sieve, and pre-fire at 820°C for 4 hours. The powder obtained by pre-calcination is crushed, ball milled, dried and passed through a 120-mesh sieve, then added a certain amount of 3wt% PVA aqueous solution to granulate, molded, stayed at 600°C for 2h to remove the glue, and then sintered at 1100-1230°C for 2h . Polish the fired ceramic sheet, burn the silver electrode and let it stand for 24 hours, and finally perform the electrical performance.

[0035] Table 1

[0036] Sample N...

Embodiment 2

[0038] Table 2 gives the formulations of the 4 samples implemented in this example. The present invention uses analytically pure grade Bi 2 o 3 、Na 2 CO 3 、TiO 2 , SrCO 3 , and MgO as raw materials, according to chemical formula (1-a) [(1-x) Bi 0.5 Na 0.5 TiO 3 +xSrTiO 3 ]+aBi 0.5 (Mg 0.5 Ti 0.5 )O 3 After weighing the raw materials, put them into a ball mill jar, use absolute ethanol as the medium, ball mill for 24 hours, put the obtained slurry into an oven for drying, pass through a 40-mesh sieve, and pre-fire at 860°C for 2 hours. The powder obtained by pre-calcination is crushed, ball milled, dried and passed through a 120-mesh sieve, then added a certain amount of 3wt% PVA aqueous solution to granulate, molded, stayed at 600°C for 2h to remove the glue, and then sintered at 1100-1250°C for 2h . Polish the fired chip, burn the silver electrode, let it stand for 24 hours, and finally conduct the electrical performance test.

[0039] Table 2

[0040]

[004...

Embodiment 3

[0043] Table 3 gives the formulations of the 4 samples implemented in this example. The present invention uses analytically pure grade Bi 2 o 3 、Na 2 CO 3 、TiO 2 , SrCO 3 , and Nb 2 o 5 As a raw material, according to the chemical formula (1-b)[(1-x)Bi 0.5 Na 0.5 TiO 3 +xSrTiO 3 ]+bNaNbO 3 After weighing the raw materials, put them into a ball mill jar, use absolute ethanol as the medium, ball mill for 24 hours, put the obtained slurry into an oven for drying, pass through a 40-mesh sieve, and pre-fire at 900°C for 2 hours. The powder obtained by pre-calcination is crushed, ball milled, dried and passed through a 120-mesh sieve, then added a certain amount of 3wt% PVA aqueous solution to granulate, molded, stayed at 600°C for 2h to remove the glue, and then sintered at 1100-1250°C for 2h . Polish the fired chip, burn the silver electrode, let it stand for 24 hours, and finally conduct the electrical performance test.

[0044] table 3

[0045]

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PUM

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Abstract

The invention discloses bismuth-based leadless piezoelectric ceramic and a piezoelectric actuator with application of the material thereof, relates to the technical field of electronic ceramics and components, and specifically provides a new leadless piezoelectric ceramic material which can replace traditional lead-based piezoelectric ceramic and is used in related fields of piezoelectric actuator application. The material provided by the invention mainly contains Bi, Ti, Na and Sr elements and a small amount of other elements, and has more excellent field-induced strain performance than PZT ceramic in the applied electric field of a traditional driver. The piezoelectric actuator based on the material can be widely applied in industrial areas of piezoelectric oil atomizers, piezoelectric precision platforms and the like.

Description

technical field [0001] The invention relates to a piezoelectric ceramic material used in the electronic component industry, a lead-free bismuth-based perovskite piezoelectric ceramic and a piezoelectric actuator / micro-displacement device using the material. Background technique [0002] Piezoelectric ceramics are an extremely important class of electronic functional materials. Actuators / drivers based on this material have been widely used in diesel fuel injectors, aerospace and optics. [0003] At present, the raw materials of piezoelectric actuators basically adopt traditional PZT-based piezoelectric ceramics. The history of this type of ceramics can be traced back to the 1950s. B.Jaffe et al. discovered a binary lead zirconate titanate (Pb(Zr,Ti)O 3 , PZT) has very excellent piezoelectric properties. PZT is composed of ferroelectric phase PbTiO 3 and antiferroelectric PbZrO 3 A continuous solid solution composed of ABO 3 perovskite type. In 1965, Japanese scholar Hir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/475H01L41/187
CPCC04B35/475C04B2235/3251C04B2235/3267C04B2235/3213C04B2235/3201C04B2235/3206C04B2235/96C04B2235/602H10N30/8536H10N30/8542H10N30/8561H10N30/853
Inventor 周佳骏童兴野李海龙刘红方敬忠
Owner INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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