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Barium-based magnesium zirconate-titanate lead-free piezoelectric ceramic with high piezoelectric constant

A technology of lead-free piezoelectric and zirconate titanate, which is applied in the field of piezoelectric ceramics with high piezoelectric constant magnesium barium titanate and lead-free piezoelectric ceramics with high piezoelectric constant magnesium barium zirconate titanate to achieve high voltage Constant, the effect of good dielectric properties

Inactive Publication Date: 2010-07-07
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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There is no patent report on magnesium barium titanate piezoelectric ceramics with high piezoelectric constant

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  • Barium-based magnesium zirconate-titanate lead-free piezoelectric ceramic with high piezoelectric constant
  • Barium-based magnesium zirconate-titanate lead-free piezoelectric ceramic with high piezoelectric constant
  • Barium-based magnesium zirconate-titanate lead-free piezoelectric ceramic with high piezoelectric constant

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Embodiment 1

[0014] Press (Ba 1-x Mg x )(Ti 1-y Zr y )O 3 Proportioning, wherein: x=0.05, y=0.05, using sol-gel method to synthesize barium zirconate titanate ceramics. First, dissolve barium hydroxide and magnesium acetate in ethylene glycol methyl ether respectively, heat and stir at 60°C and add a small amount of deionized water until the solution is clear; then dissolve zirconium ethoxide and butyl titanate in ethylene glycol methyl ether respectively, 60 ℃ heating and stirring until the solution is clear. Mix the two solutions to form a Ba-Mg-Ti-Zr composite solution, heat and stir at 60°C and add a small amount of deionized water until the solution gradually becomes a gel. The gel is dried and calcined at 900°C for 2 hours to form barium magnesium zirconate titanate powder. Use a planetary mill to pulverize, add glue, press into tablets, and sinter at 1210°C for 3 hours, then be electroded, measure dielectric properties; polarize, measure piezoelectric properties. At room temp...

Embodiment 2

[0016] Press (Ba 1-x Mg x )(Ti 1-y Zr y )O 3 Proportioning, wherein: x=0.08, y=0.04, synthetic (Ba 0.92 Mg 0.08 )(Ti 0.96 Zr 0.04 )O 3 ceramics. At first barium carbonate, magnesium carbonate, zirconium dioxide, titanium dioxide raw material, press (Ba 0.92 Mg 0.08 )(Ti 0.96 Zr 0.04 )O 3 Proportioning, mixing, crushing with a planetary mill, drying, pre-burning at 1110°C for 3 hours, crushing with a planetary mill, adding glue, pressing into tablets, sintering at 1210°C for 2 hours, and measuring the dielectric properties by electrodes; and measuring piezoelectric properties. Measure its piezoelectric constant, d 33 It is 310pC / N.

Embodiment 3

[0018] Press (Ba 1-x Mg x )(Ti 1-y Zr y )O 3 Proportioning, wherein: x=0.02, y=0.04, synthetic (Ba 0.98 Mg 0.02 )(Ti 0.96 Zr 0.04 )O 3 ceramics. All the other are with embodiment 2. The resulting piezoelectric constant, d 33 It is 230pC / N.

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Abstract

The invention discloses barium-based magnesium zirconate-titanate lead-free piezoelectric ceramic with high piezoelectric constant. The piezoelectric ceramic has a component of (Ba1-xMgx) (Ti1-yZry)O3, wherein x is more than 0 and less than 0.20, and y is more than 0 and less than 0.20; and the synthesized piezoelectric ceramic is prepared by adopting a sol-gel method, a solid-phase reaction method, a wet chemical solution method, a template grain growth technology, a reactive template grain growth technology or other methods. The prepared barium-based magnesium zirconate-titanate lead-free piezoelectric ceramic has very favorable dielectric property and high piezoelectric constant; compared with the pure barium titanate ceramic, the piezoelectric constant of the piezoelectric ceramic is improved by 2 to 3 times; and the barium-based magnesium zirconate-titanate lead-free piezoelectric ceramic has remarkable advantages compared with the traditional lead-based piezoelectric ceramics, is free of lead and suitable for environment protection requirements and especially suitable for being applied in middle and low temperature piezoelectric components.

Description

technical field [0001] The invention relates to a lead-free piezoelectric ceramic based on magnesium barium zirconate titanate with high piezoelectric constant, in particular to a piezoelectric ceramic formula with high piezoelectric constant magnesium barium titanate, which belongs to the field of electronic ceramics. Background technique [0002] Barium magnesium titanate functional ceramics have good dielectric, piezoelectric, ferroelectric, pyroelectric and other effects, and can be used to make large-capacity capacitors, non-volatile ferroelectric memories, piezoelectric drivers, infrared detectors, etc. At the same time, it is also a lead-free material, which is suitable for environmental protection requirements. There is no patent report on magnesium barium titanate piezoelectric ceramics with high piezoelectric constant. Using magnesium carbonate, barium titanate, zirconium dioxide, and titanium dioxide as raw materials, magnesium barium titanate-based ceramics can ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/49
Inventor 刘来君杨曌方亮胡长征刘勤文
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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