Publication

Materials for high temperature piezoelectric transducers

Dragan Damjanovic
1998
Journal Articles

Abstract

The most significant advance in this field in the past year has been the demonstration that single-crystal langasite, La3Ga5SiO14, can be used, at least at high frequencies, at temperatures up to 1000 degrees C. New evidence suggests that domain-wall contributions to the piezoelectric response of bismuth-titanate-based high temperature ferroelectric ceramics may be controlled using suitably chosen dopants. Modified bismuth titanate compositions are interesting for sensor applications in the medium temperature range (up to 500 degrees C).

Official source

https://infoscience.epfl.ch/entities/publication/360edd00-52e3-4d74-8f5d-514eed03df56

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Dragan Damjanovic
1998
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/360edd00-52e3-4d74-8f5d-514eed03df56

About this result

Related concepts (25)

Piezoelectricity

Piezoelectricity (ˌpiːzoʊ-,_ˌpiːtsoʊ-,_paɪˌiːzoʊ-, piˌeɪzoʊ-,_piˌeɪtsoʊ-) is the electric charge that accumulates in certain solid materials—such as crystals, certain ceramics, and biological matter such as bone, DNA, and various proteins—in response to applied mechanical stress. The word piezoelectricity means electricity resulting from pressure and latent heat. It is derived (an ancient source of electric current). The piezoelectric effect results from the linear electromechanical interaction between the mechanical and electrical states in crystalline materials with no inversion symmetry.

Crystal oscillator

A crystal oscillator is an electronic oscillator circuit that uses a piezoelectric crystal as a frequency-selective element. The oscillator frequency is often used to keep track of time, as in quartz wristwatches, to provide a stable clock signal for digital integrated circuits, and to stabilize frequencies for radio transmitters and receivers. The most common type of piezoelectric resonator used is a quartz crystal, so oscillator circuits incorporating them became known as crystal oscillators.

High frequency

High frequency (HF) is the ITU designation for the range of radio frequency electromagnetic waves (radio waves) between 3 and 30 megahertz (MHz). It is also known as the decameter band or decameter wave as its wavelengths range from one to ten decameters (ten to one hundred meters). Frequencies immediately below HF are denoted medium frequency (MF), while the next band of higher frequencies is known as the very high frequency (VHF) band. The HF band is a major part of the shortwave band of frequencies, so communication at these frequencies is often called shortwave radio.

Related publications (5)

Materials for high temperature piezoelectric transducers

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Crystal orientation dependence of the piezoelectric d(33) coefficient in tetragonal BaTiO3 as a function of temperature

Preisach modeling of piezoelectric nonlinearity in ferroelectric ceramics

Microstructure, structural defects, and piezoelectric response of Bi4Ti3O12 modified by Bi3TiNbO9