Difference between revisions of "Ceramic foam"
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==Description== | ==Description== | ||
| − | Ceramic foams are usually manufactured by impregnating open-cell polymer foams internally with ceramic slurry and then firing in a kiln, leaving behind only ceramic material. | + | A stiff, lightweight foam made from ceramics. Ceramic foams are usually manufactured by impregnating open-cell polymer foams internally with ceramic slurry and then firing in a kiln, leaving behind only ceramic material. This produces an open-cell structure that has a very high porosity, with typically 75-95% of the volume consisting of void spaces. The strength of foamed material possesses a power law relationship to its density: for example, a 20% dense material is more than twice as strong as a 10% dense material. Surprisingly, foamed ceramics exhibit a toughness and strength that bulk ceramics do not have. This is because, when a crack occurs, its travel stops at an open-cell, rather than propagating through the material. |
== Synonyms and Related Terms == | == Synonyms and Related Terms == | ||
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==Applications== | ==Applications== | ||
* thermal insulation, acoustic insulation | * thermal insulation, acoustic insulation | ||
| − | * adsorption of environmental pollutants | + | * adsorption of environmental pollutants |
* filtration of molten metal alloys | * filtration of molten metal alloys | ||
| − | == | + | ==Physical and Chemical Properties== |
==Resources and Citations== | ==Resources and Citations== | ||
Revision as of 12:27, 7 February 2024
Description
A stiff, lightweight foam made from ceramics. Ceramic foams are usually manufactured by impregnating open-cell polymer foams internally with ceramic slurry and then firing in a kiln, leaving behind only ceramic material. This produces an open-cell structure that has a very high porosity, with typically 75-95% of the volume consisting of void spaces. The strength of foamed material possesses a power law relationship to its density: for example, a 20% dense material is more than twice as strong as a 10% dense material. Surprisingly, foamed ceramics exhibit a toughness and strength that bulk ceramics do not have. This is because, when a crack occurs, its travel stops at an open-cell, rather than propagating through the material.
Synonyms and Related Terms
Foamed ceramic;
Applications
- thermal insulation, acoustic insulation
- adsorption of environmental pollutants
- filtration of molten metal alloys
Physical and Chemical Properties
Resources and Citations
- American Elements: Foams