SUN Jinxing1, LIU Peisheng2
(Key Laboratory of Beam Technology and Material Modification of Ministry of Education, College of Nuclear Science and
Technology, Beijing Normal University, Beijing 100875, China)
Abstract:Porous sound absorption ceramics, which are based on three dimensional network and through-hole structure, are composed with the through-holes filled with gas to form composite material, which has good properties of sound absorption and noise reduction, and has been widely used in many fields, such as construction, vehicle, aerospace and machinery, as sound absorption material. This paper introduced the manufacture methods, sound absorption mechanism, sound absorption evaluation of porous sound absorption ceramics and the research situation of three kinds of porous materials.
Key words:porous ceramics; sound absorption materials; sound absorption coefficient; sound absorption test