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Barium calcium zirconate titanate based lead-free piezoelectric ceramics and preparation method thereof

A technology based on lead-free piezoelectricity and barium calcium zirconate titanate, applied in the field of piezoelectric ceramics, can solve problems such as low Curie temperature, affecting the performance of piezoelectric devices, and depolarization

Active Publication Date: 2021-10-08
GOERTEK MICROELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, barium calcium zirconate titanate ceramics is the lead-free system with the highest piezoelectric performance, but the Curie temperature of this type of piezoelectric ceramics is relatively low, usually between 73-93 °C
For piezoelectric devices, the operating temperature of piezoelectric ceramics must be lower than half of the Curie temperature, otherwise, obvious depolarization will occur, which will affect the performance of piezoelectric devices.

Method used

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  • Barium calcium zirconate titanate based lead-free piezoelectric ceramics and preparation method thereof

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Embodiment Construction

[0035] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

[0036] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses.

[0037] Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part of the description.

[0038] In all examples shown and discussed herein, any specific values ​​should be construed as illustrative only, and not as limiting. Therefore, other instances of the exemplary embodiment may have dif...

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Abstract

The invention discloses a barium calcium zirconate titanate-based lead-free piezoelectric ceramic and a preparation method thereof. The barium calcium zirconate titanate-based lead-free piezoelectric ceramic is represented by the following general formula I: (1-x)Ba 0.85 Ca 0.15 Zr 0.1 Ti 0.9 o 3 ‑xK 2.9 Li 1.95 Nb 5.15 o 15.3 (I) wherein, x is K 2.9 Li 1.95 Nb 5.15 o 15.3 Compound (1‑x)Ba 0.85 Ca 0.15 Zr 0.1 Ti 0.9 o 3 ‑xK 2.9 Li 1.95 Nb 5.15 o 15.3 The mole percentage of , 0.001≤x≤0.005. The barium calcium zirconate titanate-based lead-free piezoelectric ceramic of the invention has simultaneously improved piezoelectric performance and Curie temperature, and has practical value.

Description

technical field [0001] The invention relates to the technical field of piezoelectric ceramics, in particular to a barium calcium zirconate titanate-based lead-free piezoelectric ceramic and a preparation method thereof. Background technique [0002] Piezoelectric ceramics can realize mutual conversion between electrical energy and mechanical energy, and have been widely used in sensors, drivers, transducers, frequency control devices, and electroacoustic devices. [0003] Lead zirconate titanate-based piezoelectric ceramics have become the preferred piezoelectric materials for various electronic components due to their excellent piezoelectric properties. In lead zirconate titanate-based piezoelectric ceramics, the mass fraction of lead exceeds 60%, and lead and its compounds are highly toxic, which seriously threatens the environment and human health. With the gradual enhancement of people's awareness of environmental protection, the lead-free piezoelectric ceramics has bec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/49C04B35/622
CPCC04B35/49C04B35/622C04B2235/3201C04B2235/3203C04B2235/3208C04B2235/3215C04B2235/3255
Inventor 赵小波俞胜平篙洪伟
Owner GOERTEK MICROELECTRONICS CO LTD