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Lead-free piezoelectric ceramic consisting of B-bit compound Bi-based compounds and preparation method thereof

A lead-free piezoelectric and compound technology, applied in the field of piezoelectric ceramic materials, can solve problems such as unreported B-site composite Bi, and achieve the effects of improving composition uniformity, optimizing piezoelectric properties, and excellent piezoelectric properties.

Inactive Publication Date: 2014-09-10
GUILIN UNIV OF ELECTRONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing literature has not reported the B-site complex Bi (Li 1 / 2 Me 1 / 2 )O 3 Report on Pb-based Piezoelectric Ceramics and Its Preparation Method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The preparation ingredients are: (1- x - y ) Bi (Li 1 / 2 Me 1 / 2 )O 3 - x BaTiO 3 - y (K 1 / 2 Bi 1 / 2 )TiO 3 + z m a o b ,in x =0.90, y =0.05, z =0.01, Me=90%Nb+10%Ta, M=La. A lead-free piezoelectric ceramic composed of B-site composite Bi-based compounds

[0023] The preparation method comprises the following steps:

[0024] To analyze pure Bi 2 o 3 、Na 2 CO 3 、BaCO 3 、K2 CO 3 , Li 2 CO 3 , Nb 2 o 5 、 Ta 2 o 3 and TiO 2 as raw materials, respectively according to the following chemical formula:

[0025] Bi (Li 1 / 2 (Nb 0.9 Ta 0.1 ) 1 / 2 )O 3 , BaTiO 3

[0026] For batching, use absolute ethanol as a medium for high-energy ball milling for 10 hours, dry at 80°C, and then hold at 750°C for 2 hours to pre-synthesize Bi (Li 1 / 2 (Nb 0.9 Ta 0.1 ) 1 / 2 )O 3 , pre-synthesized BaTiO at 950°C for 2 hours 3 , pre-synthesized at 850°C for 2 hours (Na 1 / 2 Bi 1 / 2 )TiO 3 , pre-synthesized at 900°C for 2 hours (K 1 / 2 Bi 1 / 2 )TiO 3 Porcelai...

Embodiment 2

[0032] The preparation ingredients are: (1- x - y ) Bi (Li 1 / 2 Me 1 / 2 )O 3 - x BaTiO 3 - y (K 1 / 2 Bi 1 / 2 )TiO 3 + z m a o b ,in x =0.06, y =0.89, z =0.01, Me=90%Nb+10%Mn, M=Nd. Lead-free piezoelectric ceramics composed of B-site compound Bi-based compounds

[0033] Preparation method is the same as embodiment 1, 1100 DEG C of sintering temperature, 650 DEG C of hot-pressing sintering temperature.

[0034] The performance measurements are as follows:

[0035] d 33 (pC / N) Q m k p ε r tanδ(%) k t 97 319 0.21 755 3.85 0.153

Embodiment 3

[0037] Preparation ingredients: (1- x - y ) Bi (Li 1 / 2 Me 1 / 2 )O 3 - x BaTiO 3 - y (K 1 / 2 Bi 1 / 2 )TiO 3 + z m a o b ,in x =0.80, y= 0.12, z =0.01, Me=95%Nb+10%Mn, M=90%In+10%Sc. Lead-free piezoelectric ceramics composed of B-site composite Bi-based compounds

[0038] Preparation method is the same as Example 1, 1250 DEG C of sintering temperature, 3 hours holding time, 850 DEG C of hot-pressing sintering temperature, 2 hours holding time.

[0039] The performance measurements are as follows:

[0040] d 33 (pC / N) Q m k p ε r tanδ(%) k t 176 239 0.252 1403 2.05 0.36

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Abstract

The invention discloses a lead-free piezoelectric ceramic consisting of B-bit compound Bi-based compounds and a preparation method thereof. The general formula of the lead-free piezoelectric ceramic is shown in (1-x-y)Bi(Li1 / 2Me1 / 2)O[3-x]BaTiO[3-y](K1 / 2Bi1 / 2)TiO[3+z]MaOb, wherein x, y and z refer to mole fractions, x is larger than 0 and less than 1.0, y is larger than 0 and less than 0.1, z is larger than or equal to 0 and less than or equal to 0.1; Me is one or more pentavalent metallic elements, and MaOb is one or more oxides, and M is monovalent to hexavalent elements and can form a solid oxide with oxygen; and the lead-free piezoelectric ceramic is prepared by using a conventional ceramic preparation method. A prepared lead-free piezoelectric ceramic has good sintering properties, is simple and stable in preparation process and good in performance, and can partially replace a traditional lead-based piezoelectric ceramic.

Description

[0001] The application date of this case is June 16, 2011, the application number is 201110162421.0, and the name of the invention is: a divisional application of lead-free piezoelectric ceramics composed of B-site composite Bi-based compounds and its preparation method. technical field [0002] The invention relates to a piezoelectric ceramic material, in particular to a lead-free piezoelectric ceramic composed of a B-site composite Bi-based compound and a preparation method thereof. Background technique [0003] Piezoelectric ceramics are widely used in high-tech fields such as information, laser, navigation, electronic technology, communication, measurement and detection, precision processing and sensing technology. However, most of the current practical piezoelectric ceramics are lead zirconate titanate (PZT) or lead zirconate titanate-based materials, and the content of lead oxide in these materials accounts for about 70%. Actively prohibit lead-containing electronic pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/475C04B35/468C04B35/622
Inventor 周昌荣成钧杨华斌周沁袁昌来陈国华
Owner GUILIN UNIV OF ELECTRONIC TECH
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