01604naa a2200229 i 4500 BPP BPK 20180427091614.0 151112s2000 pl f |100 0 eng BPK eng POL SUSZYŃSKI, Zbigniew. 1996 - . Politechnika Koszalińska - Wydział Elektroniki, Katedra Elektroniki Ciała Stałego Photoacoustic amplitude method of determining of the thermal diffusivity of non-opaque materials / Z. Suszyński. 2000. kopia dokumentu (Informator o publikowanych wynikach prac naukowo-badawczych w roku 2000 Wydziału Elektroniki). The fast and simple photoacoustic method of measuring the thermal diffusivity of optically non-opaque solid-state meterials is presented. The methods is based on the measuring of the photoacoustic signal amplitude for the illumination of the front and rear surfaces. On the basis of this the ratio of the amplitudes of both photoacoustic signal versus frequency is evaluated. Comparing it with the theoretical characteristics makes possible the calculation of thermal diffusivity coefficient. It is calculated on the basis of the fitting of the experimantal ratio amplitude characteristic with the pattern ones. Experimental results illustrating the procedure are presented and discussed for the Hysol MG-40F-R and stained glass. Materiały konferencyjne. Therminic Workshop (6 ; 2000 ; Budapeszt, Węgry). W : VI Therminic Workshop. - 2000, s. 116-119 ART UKD 297 297