A Novel Production Method for Porous Sound-Absorbing Ceramic Material for High-Temperature Applications

Autor:	Koch Dietmar, Eigenbrod Christian, Giese Frank
Rok vydání:	2011
Předmět:	Marketing Filler (packaging) Fabrication Materials science Airflow Condensed Matter Physics Microstructure Scientific method visual_art Materials Chemistry Ceramics and Composites Perlite visual_art.visual_art_medium Ceramic Composite material Porosity
Zdroj:	International Journal of Applied Ceramic Technology. 8:646-652
ISSN:	1546-542X
DOI:	10.1111/j.1744-7402.2009.02479.x
Popis:	A new processing technique combining the freeze gelation process with sacrificial templating is used to create self-supporting ceramic sound absorption structures for high-temperature applications. The process leads to near-net shape components with an open-pored structure. Expanded perlite, acting as melting filler, increases the porosity up to 74%. The resulting properties of the microstructure such as porosity and airflow resistance are presented. Acoustical measurements in an impedance tube show high sound absorption coefficients up to 0.7. The measured sound absorption is compared with a mathematical simulation. In summary, this process allows the fabrication of temperature-resistant ceramic sound absorbers.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f0347aad60864683c465f233cbbac4bd https://doi.org/10.1111/j.1744-7402.2009.02479.x Zobrazit plný text záznamu Plný text ve formátu PDF