Abstracts Book - IMRC 2018

• SE2-P029
SELF-NORMALIZED PHOTOACOUSTIC TECHNIQUE FOR THERMAL
DIFFUSIVITY MEASUREMENTS OF MATERIALS CONSISTING ON
THIN LAYERS
José Abraham Balderas López 1 , Yolanda de Las Mercedes Gómez y Gómez 2 , María Esther
Bautista Ramírez 2
1 Instituto Politécnico Nacional - IPN, Ciencias Básicas, Mexico. 2 Instituto Politécnico Nacional -
IPN, Bioprocesos, Mexico.
A self-normalized photoacoustic (PA) technique for thermal diffusivity
measurements of materials consisted on thin layers is presented. This
methodology involves the analysis of the self-normalized PA signal as a function
of the modulation frequency. This PA self-normalized signal consist in the ratio
of signals in the transmission and front configurations. The thermal diffusivity
of a steel foil, a silicon layer, different papers and a black paint on a glass
substrate, were measured for to illustrate on the applications of this
methodology and at the same time on the range of thermal diffusivities that can
be studied with this methodology.
Keywords: Photoacoustic, Thermal Diffusivity, Materials
Presenting authors email: abrahambalderas@hotmail.com