СПОСІБ ВИЗНАЧЕННЯ ТЕПЛОЄМКОСТІ ТА ТЕПЛОПРОВІДНОСТІ НАНОСТРУКТУРОВАНИХ МАТЕРІАЛІВ ЗА ДОПОМОГОЮ ФОТОАКУСТИЧНОЇ ТЕХНІКИ

摘要

A useful model belongs to the physics field, in particular to the methods of study and diagnostic of thermophysical parameters of solid-state structures. The method of photoacoustic study of the thermophysical parameters of samples consists in irradiation with periodically-modulated light of a photoacoustic cell with a sample. As a result of the radiation absorption the sample is heated. It leads to thermoelastic stresses arising in the considered multilayered system. These stresses are detected by a piezoelectric transducer. Portion of thermal energy is transferred in reference transparent substance. The useful model allows simultaneous evaluation information about heat capacity and thermal conductivity of nanostructured systems.