Lead-free piezoceramic material with manganese doping with bismuth titanate sodium group and preparation method thereof

A sodium bismuth titanate-based, lead-free piezoelectric technology is applied in the field of functional ceramics, which can solve the problems of limited development and achieve the effect of good microstructure and complete grain development.

Inactive Publication Date: 2010-05-12
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the doping modification of BNKB ternary lead-free piezoelectric ceramics is limited, and there are very few reports at present.

Method used

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  • Lead-free piezoceramic material with manganese doping with bismuth titanate sodium group and preparation method thereof
  • Lead-free piezoceramic material with manganese doping with bismuth titanate sodium group and preparation method thereof
  • Lead-free piezoceramic material with manganese doping with bismuth titanate sodium group and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Adopt anhydrous sodium carbonate, anhydrous potassium carbonate, bismuth oxide, titanium dioxide, barium carbonate and manganese carbonate, press 83.95Wt% Bi 1 / 2 Na 1 / 2 TiO 3 , 12.30Wt%Bi 1 / 2 K 1 / 2 TiO 3 , 3.26Wt% BaTiO 3 , 0.49 wt% MnCO 3 Prepare raw materials;

[0019] (2) The powder is compressed into blocks at 40 MPa, and the pre-synthesis temperature is 850° C., and the temperature is kept for 1 hour. The sintering temperature is 1170°C, and the holding time is 2 hours.

[0020] Other conditions are the same as the comparison

Embodiment 2

[0022] (1) Adopt anhydrous sodium carbonate, anhydrous potassium carbonate, bismuth oxide, titanium dioxide, barium carbonate and manganese carbonate, press 83.55Wt% Bi 1 / 2 Na 1 / 2 TiO 3 , 12.24Wt%Bi 1 / 2 K 1 / 2 TiO 3 , 3.25wt% BaTiO 3 and 0.96Wt% MnCO 3 With raw materials

[0023] (2) The powder is pressed into blocks at 30MPa, the pre-synthesis temperature is 800°C, and the temperature is kept for 1 hour. The sintering temperature is 1150°C, and the holding time is 2 hours.

[0024] Other conditions are the same as the comparison example.

[0025] Table 1 is the performance contrast table of the ceramic sample prepared by comparative example, embodiment 1 and 2

[0026]

[0027] The test conditions are as follows:

[0028] The bulk density is measured by the Metler XS104 precision electronic balance according to the Archimedes drainage method;

[0029] Dielectric constant and dielectric loss: Use the Agilent E4980 precision LCR meter to measure capacitance and die...

Embodiment 3

[0034] (1) Adopt anhydrous sodium carbonate, anhydrous potassium carbonate, bismuth oxide, titanium dioxide, barium carbonate and manganese carbonate, press 80.15Wt% Bi 1 / 2 Na 1 / 2 TiO 3 , 13.19Wt%Bi 1 / 2 K 1 / 2 TiO3 , 5.38Wt% BaTiO 3 and 1.28Wt%MnCO 3 Prepare raw materials;

[0035] (2) The powder is pressed into blocks at 30MPa, the pre-synthesis temperature is 800°C, and the temperature is kept for 1 hour. The sintering temperature is 1180°C, and the holding time is 1 hour.

[0036] Other conditions are the same as the comparison example.

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Abstract

The invention relates to a lead-free piezoceramic material with manganese doping with bismuth titanate sodium group and a preparation method thereof, belonging to the field of functional ceramics. The invention selects 80.15-84.61wt% of Bil/2Nal/2TiO3, 10.26-13.19wt% of Bil/2K1/2TiO3, 2.17-5.44wt% of BaTiO3 as the substrate, and takes 0.32-1.28wt% of MnCO3 as the doping material, controls the pre-synthesizing temperature to a range of 800-950 DEG C and preserves the temperature for 1-4 hours; and keeps the sintering temperature to a range of 1130-1190 DEG C and preserves the temperature for 1-4 hours to obtain the novel lead-free piezoceramics. The piezoceramics obtained by utilizing the method provided in the invention have the advantages of high piezoelectric constant (191) and mechanical quality factor (314), good microcosmic structure, complete growth of crystal particles. The lead-free piezoceramics provided in the invention can be used for manufacturing piezoelectric devices such as piezoelectric sensor and actuator and the like.

Description

technical field [0001] The invention relates to a manganese-doped bismuth sodium titanate-bismuth potassium titanate-barium titanate ternary lead-free piezoelectric ceramic material, which belongs to the field of functional ceramics. Background technique [0002] Piezoelectric ferroelectric ceramics have excellent ferroelectricity, piezoelectricity, dielectricity, pyroelectricity, etc., and are widely used in functional ceramics, such as ferroelectric memory, piezoelectric sensors and transducers, Piezoelectric filters, infrared detectors, etc. have important applications in the fields of information, communication, and automatic control, and have formed large-scale industries. At present, lead-containing piezoelectric ceramics, which are widely used, lead oxide or lead trioxide accounts for about 70% of the total mass of raw materials, which is highly volatile at the sintering temperature. On the one hand, it causes harm to the human body and the environment. The stoichiom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/462C04B35/622
Inventor 魏晓林肖化平刘文亮张凯旺孙立忠陈元平
Owner XIANGTAN UNIV
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