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A kind of high Curie temperature piezoelectric ceramics and preparation method thereof

A technology of piezoelectric ceramics and ceramics, applied in the field of high Curie temperature piezoelectric ceramics and its preparation, can solve problems such as unsatisfactory

Active Publication Date: 2021-06-18
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the output of piezoelectric ceramics in my country ranks first in the world, its products are basically binary and ternary materials with lead zirconate titanate as the main body. use of temperature

Method used

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  • A kind of high Curie temperature piezoelectric ceramics and preparation method thereof
  • A kind of high Curie temperature piezoelectric ceramics and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A high Curie temperature piezoelectric ceramic according to the present embodiment, the general chemical formula is:

[0029] 0.85Bi 2.95 Nd 0.05 Ti 0.98 Mo 0.02 NbO 9 -0.15 (Na 0.45 Bi 0.45 Ba 0.1 )Nb 1.8 Ta 0.2 o 9

[0030] The general chemical formula of ceramic A is: Bi 2.95 Nd 0.05 Ti 0.98 Mo 0.02 NbO 9 .

[0031] The general chemical formula of ceramic B is: (Na 0.45 Bi 0.45 Ba 0.1 )Nb 1.8 Ta 0.2 o 9 .

[0032] A preparation method of the high Curie temperature piezoelectric ceramic of the present embodiment, comprising the following steps:

[0033] (1), weigh the required raw materials respectively according to the general chemical formula of ceramics A and ceramics B, the raw materials are: Bi 2 o 3 (99.9%), Nd 2 o 3 (99.99%), TiO 2 (chemically pure), Nb 2 o 5 (99.99%), Ta 2 o 5 (99.99%), MoO 3 (analytically pure), Na 2 CO 3 (analytical grade), BaCO 3 (analytical pure);

[0034] (2), weighed raw materials are dropped into the...

Embodiment 2

[0042] A high Curie temperature piezoelectric ceramic according to the present embodiment, the general chemical formula is:

[0043] 0.65 Bi 2.98 Nd 0.02 Ti 0.95 Mo 0.05 NbO 9 -0.35 (Na 0.49 Bi 0.49 Ba 0.02 )Nb 1.95 Ta 0.05 o 9

[0044] The general chemical formula of ceramic A is: Bi 2.98 Nd 0.02 Ti 0.95 Mo 0.05 NbO 9 .

[0045] The general chemical formula of ceramic B is: (Na 0.49 Bi 0.49 Ba 0.02 )Nb 1.95 Ta 0.05 o 9 .

[0046] A preparation method of the high Curie temperature piezoelectric ceramic of the present embodiment, comprising the following steps:

[0047] (1), weigh the required raw materials respectively according to the general chemical formula of ceramics A and ceramics B, the raw materials are: Bi 2 o 3 (99.9%), Nd 2 o 3 (99.99%), TiO 2 (chemically pure), Nb 2 o 5 (99.99%), Ta 2 o 5 (99.99%), MoO 3 (analytically pure), Na 2 CO 3 (analytical grade), BaCO 3 (analytical pure);

[0048] (2), weighed raw materials are put into ...

Embodiment 3

[0056] A high Curie temperature piezoelectric ceramic according to the present embodiment, the general chemical formula is:

[0057] 0.2Bi 2.96 Nd 0.04 Ti 0.97 Mo 0.03 NbO 9 -0.8 (Na 0.47 Bi 0.47 Ba 0.06 )Nb 1.9 Ta 0.1 o 9

[0058] The general chemical formula of ceramic A is: Bi 2.96 Nd 0.04 Ti 0.97 Mo 0.03 NbO 9 .

[0059] The general chemical formula of ceramic B is: (Na 0.47 Bi 0.47 Ba 0.06 )Nb 1.9 Ta 0.1 o 9 .

[0060] A preparation method of the high Curie temperature piezoelectric ceramic of the present embodiment, comprising the following steps:

[0061] (1), weigh the required raw materials respectively according to the general chemical formula of ceramics A and ceramics B, the raw materials are: Bi 2 o 3 (99.9%), Nd 2 o 3 (99.99%), TiO 2 (chemically pure), Nb 2 o 5 (99.99%), Ta 2 o 5 (99.99%), MoO 3 (analytically pure), Na 2 CO 3 (analytical grade), BaCO 3 (analytical pure);

[0062] (2), weighed raw materials are dropped into the...

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Abstract

The invention discloses a piezoelectric ceramic with a high Curie temperature. The general chemical formula of the piezoelectric ceramic with a high Curie temperature is: (1‑ x ) Bi 3‑y Nd y Ti 1‑z Mo z NbO 9 - x (Na 0.5‑m Bi 0.5‑m Ba 2m )Nb 2‑ n Ta n o 9 , where 0.15 <x<0.85，0≤y≤0.1，0≤z≤0.05，0≤m≤0.15，0≤n≤0.35，高居里温度压电陶瓷由陶瓷a和陶瓷b复合而成，陶瓷a的化学通式为bi3‑yNd y Ti 1‑z Mo z NbO 9 , the general chemical formula of ceramic B is (Na 0.5‑m Bi 0.5‑m Ba 2m )Nb 2‑n Ta n o 9 , the present invention has the advantages of high Curie temperature and long service life.

Description

technical field [0001] The invention relates to the field of functional ceramics, in particular to a high Curie temperature piezoelectric ceramic and a preparation method thereof. Background technique [0002] Any running mechanical parts will inevitably generate vibration signals. Therefore, vibration measurement widely exists in the field of modern industry. To detect vibrations, corresponding vibration sensors are required. Piezoelectric acceleration sensor is one of the most widely used and most varieties of sensors. Aeroengines, steam turbines, gas turbines, nuclear power heat exchange pipelines and other advanced equipment and large-scale industrial equipment and other working environments will involve high-temperature fields, and the vibration signal monitoring of these equipment and equipment is inseparable from high-temperature piezoelectric acceleration sensors. At present, the application temperature of high-temperature piezoelectric acceleration sensors general...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L41/43C04B35/453C04B35/622C04B41/88H01L41/187
CPCC04B35/453C04B35/622C04B41/009C04B41/5122C04B41/88C04B2235/3251C04B2235/3256C04B2235/3232C04B2235/3201C04B2235/3215C04B2235/3224C04B2235/602C04B2235/656C04B2235/6567H10N30/8542H10N30/8561H10N30/097C04B41/0072
Inventor 彭志航曹峰向阳费厚军陈莉
Owner NAT UNIV OF DEFENSE TECH
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