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Producing Ceramic Foams with Hollow Spheres

2004; Wiley; Volume: 87; Issue: 1 Linguagem: Inglês

10.1111/j.1151-2916.2004.tb19965.x

1551-2916

I. Thijs, Jan Luyten, Steven Mullens,

Cellular and Composite Structures

Ceramic foams have a large potential for many applications and can be produced in several ways. In the past, many have attempted to manufacture ceramic foams that combined sufficient strength and controlled microstructure. This study proposes a new two‐step processing route to fulfill these requirements. First, sacrificial cores are coated with ceramic powder slurry and packed in a die. Second, the cores are connected together using another ceramic slurry coating. After they are burned out and sintered, ceramic foam structures can be obtained that have a density <10% of theoretical density. By varying the size and shape of the initial cores, ceramic foams with tailor‐made microstructures can be easily produced.