Relativity of Electric Field to Resonance Characteristics and Piezoelectric Constants of Modified PZT Ceramics
| Autor: | Jong-Nam Lim, Jin-Heon Oh, Kee-Joe Lim, Seung-Su Lee |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Materials science
business.industry Electrical engineering Electric charge Signal Piezoelectricity Electronic Optical and Magnetic Materials visual_art Electric field Ultrasonic motor visual_art.visual_art_medium Ceramic Electrical and Electronic Engineering Composite material Material properties business Voltage |
| Zdroj: | Transactions on Electrical and Electronic Materials. 10:196-199 |
| ISSN: | 1229-7607 |
| DOI: | 10.4313/teem.2009.10.6.196 |
| Popis: | Since piezoelectric phenomenon able to develop an electric charge proportional to a mechanical stress discovered by J. and P. Curie first, this material has been utilized as core material in diversity fields [1]. Generally, material properties of PZT ceramics are measured under the small signal input. Concrete concept and process are stated clearly in the international standards [2]. The various material constants, determined by these methods are accepted as being trustworthy. In high power devices, such as ultrasonic motors and PZT actuators need a high level or great vibration amplitude, large input signals should be provided to the PZT elements. In accordance with many previous researches, material properties of PZT ceramics shows the linear characteristics only limited ranges of input voltages [3-5]. Hence, it is difficult to estimate the suitability of PZT ceramic material in case of high power applications. In Institute of Radio Engineers (IRE) standards, the material properties are able to be acquired from frequency-impedance characteristics of PZT ceramics [2]. Therefore, if these relations are varied with the applied input voltage, the material constants, calculated by the method enshrined in the standards, undergo changes necessarily. This fact signifies that the material properties of PZT ceramics are affected by the applied electric fields. In this study, we fabricated the disk type PZT ceramic specimens by conventional methods and considered the electric field dependence of frequencyimpedance characteristics. And also, we calculated the PZT constant d33 using the resonance method of the IRE standards from those frequencies representatively. |
| Databáze: | OpenAIRE |
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