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No-prebaking sodium bismuth titanate-barium titanate lead-less piezoelectric ceramic doping material and its prepn

A pre-fired sodium bismuth titanate, lead-free piezoelectric technology, applied in non-pre-fired bismuth sodium titanate-barium titanate lead-free piezoelectric ceramic doping materials and its preparation, bismuth sodium titanate-titanic acid In the field of barium lead-free piezoelectric ceramics, it can solve the problems of high energy and time and high cost, and achieve excellent piezoelectric ferroelectric performance, energy saving and production time.

Inactive Publication Date: 2007-12-26
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned methods are all traditional sintering methods, that is, pre-synthesis at about 800°C and then sintering, which consumes more energy and time, making it more costly in the production process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Formulation: 0.93 Bi 0.5 Na 0.5 TiO 3 +0.07BaTiO 3

[0030] Method: direct sintering

[0031] Performance: d 33 (pC / N) g 33 (mVm·N -1 ) tg δ(%) ε T 33 / ε 0 k t / k p

[0032] 166 19.98 3.35 939 1.49

[0033] Method: pre-fired at 860°C and then sintered

[0034] Performance: d 33 (pC / N)g 33 (mVm·N -1 ) tg δ(%) ε T 33 / ε 0 k t / k p

[0035] 138 17.46 3.7 893 1.32

Embodiment 2

[0037] Formulation: 0.93 Bi 0.5 Na 0.5 TiO 3 +0.07BaTiO 3 +0.01wt%In 2 o 3

[0038] Method: direct sintering

[0039] Performance: d 33 (pC / N) g 33 (mVm·N -1 ) tg δ(%) ε T 33 / ε 0 k t / k p

[0040] 183 20.34 3.43 1014 2.32

[0041] Method: pre-fired at 860°C and then sintered

[0042] Performance: d 33 (pC / N)g 33 (mVm·N -1 ) tg δ(%) ε T 33 / ε 0 k t / k p

[0043] 138 20.12 3.80 775 1.58

Embodiment 3

[0045] Formulation: 0.93 Bi 0.5 Na 0.5 TiO 3 +0.07BaTiO 3 +0.014wt%In 2 o 3

[0046] Method: direct sintering

[0047] Performance: d 33 (pC / N)g 33 (mVm·N -1 ) tg δ(%) ε T 33 / ε 0 k t / k p

[0048] 194 20.17 3.86 1087 2.18

[0049] Method: pre-fired at 860°C and then sintered

[0050] Performance: d 33 (pC / N)g 33 (mVm·N -1 ) tg δ(%) ε T 33 / ε 0 k t / k p

[0051] 146 17.59 4.00 938 1.31

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Abstract

The no-prebaking sodium bismuth titanate-barium tiatnate lead-less piezoelectric ceramic doping material has the composition expression of (1-x)Bi0.5Na0.5TiO3+xBaTiO3+yIn2O3, where, x is 0.06-0.08 wt% and y is 0-0.02 wt%. Compared with conventional process, the preparation process of the present invention has no pre-synthesis and fine grinding steps, saving in power consumption and production period, high efficiency and low cost, and the product has ferroelectric performance of d33 up to 190 and g33 up to 20, approaching that of lead-base piezoelectric ceramic.

Description

technical field [0001] The invention relates to sodium bismuth titanate-barium titanate lead-free piezoelectric ceramics, in particular to non-pre-fired bismuth sodium titanate-barium titanate lead-free piezoelectric ceramic doping material and its preparation method. The invention belongs to the field of environment-harmonic piezoelectric ceramic materials. Background technique [0002] As a class of important information functional ceramic materials, piezoelectric ceramics are widely used in the detection, transmission, storage and processing of various information. At present, most piezoelectric ceramics used in industrial production are based on lead zirconate titanate (Pb(Zr,Ti)O 3 ) or lead titanate (PbTiO 3 ) is a lead-based piezoelectric ceramic composition as a main component. This kind of piezoelectric ceramic material has excellent piezoelectric ferroelectric properties and high Curie temperature. However, due to PbO or Pb 3 o 4 It is volatile at high temper...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/462C04B35/622C04B35/64
Inventor 周桃生黄荣厦顾豪爽郭建勇李剑柴荔英
Owner HUBEI UNIV
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