Temperature dependence of PA signals detected by a piezoelectric transducer

Author

Koda, Toshio ; Ogiso, Hisato ; Nakano, Sizuka ; Nagata, Yoshihiko ; Yamanaka, Kazushi

Author_Institution

Mech. Eng. Lab., Ibaraki, Japan

fYear

1990

fDate

4-7 Dec 1990

Firstpage

649

Abstract

The amplitude and phase of photoacoustic (PA) signals from a thin plate, pure water, water including ultrafine particles, a 15% solution of Na₂HPO₄ in water, and a turbid solution were observed by a piezo-PA system as a function of the modulation frequency and temperature. In the case of a thin plate, the PA signals exhibit two kinds of temperature dependences according to the modulation frequency. In the case of the liquid samples, the ultrafine particles are found to enhance the change of PA signals due to the phase transition

Keywords

photoacoustic effect; piezoelectric transducers; signal detection; ultrasonic measurement; ultrasonic transducers; Na₂HPO₄ aqueous solution; modulation frequency; phase transition; photoacoustic signal amplitude; photoacoustic signal detection; photoacoustic signal phase; piezoelectric transducer; pure water; temperature dependences; thin plate; turbid solution; ultrafine particles; Acoustic signal detection; Frequency modulation; Laboratories; Noise measurement; Optical materials; Optical modulation; Phase change materials; Piezoelectric transducers; Signal detection; Temperature dependence;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1990. Proceedings., IEEE 1990

Conference_Location

Honolulu, HI

Type

conf

DOI

10.1109/ULTSYM.1990.171444

Filename

171444