Acoustic absorption of a new class of alumina foams with various high-porosity levels

• Autorzy: Zieliński T. G. , Potoczek M. , Śliwa R. E. , Nowak Ł. J.
• Języki publikacji: EN

Abstrakty

EN

Recently, a new class of ceramic foams with porosity levels up to 90% has been developed as a result of the association of the gelcasting process and aeration of the ceramic suspension. This paper presents and discusses original results advertising sound absorbing capabilities of such foams. The authors man- ufactured three types of alumina foams in order to investigate three porosity levels, namely: 72, 88, and 90%. The microstructure of foams was examined and typical dimensions and average sizes of cells (pores) and cell-linking windows were found for each porosity case. Then, the acoustic absorption coefficient was measured in a wide frequency range for several samples of various thickness cut out from the foams. The results were discussed and compared with the acoustic absorption of typical polyurethane foams proving that the alumina foams with high porosity of 88-90% have excellent sound absorbing properties competitive with the quality of sound absorbing PU foams of higher porosity.

Słowa kluczowe

EN

sound absorption; porous materials; alumina foam

• Wydawca: Instytut Podstawowych Problemów Techniki PAN ; Komitet Akustyki PAN ; Polskie Towarzystwo Akustyczne
• Czasopismo: Archives of Acoustics
• Rocznik: 2013
• Tom: Vol. 38, No. 4
• Strony: 495--502
• Opis fizyczny: Bibliogr. 25 poz., fot., tab., wykr.

Twórcy

autor

Zieliński T. G.

• Institute of Fundamental Technological Research Polish Academy of Sciences Pawińskiego 5B, 02-106 Warszawa, Poland

autor

Potoczek M.

• Faculty of Chemistry, Rzeszow University of Technology al. Powstańców Warszawy 12, 35-959 Rzeszów, Poland

autor

Śliwa R. E.

• Faculty of Mechanical Engineering and Aeronautics, Rzeszow University of Technology al. Powstańców Warszawy 12, 35-959 Rzeszów, Poland

autor

Nowak Ł. J.

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