Browsing by Subject "longitudinal wave"

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  • Kohout, Tomas; Karlqvist, Ronnie; Lassila, Ilkka Johannes; Eskelinen, Joona Juhani; Hortling, Airi; Pesonen, Lauri; Haeggström, Edward (2013)
    An ultrasonic method was tested to rapidly determine the porosity in custom made ceramic samples. The samples with porosities between 4 and 33% were of identical composition. The porosity estimates by ultrasonic method were validated against those obtained by helium and air pycnometry as well as with Archimedean method. The ultrasonic measurements can be performed rapidly (less than a minute) but they require a well prepared sample.