Synthesis of porous biomorphic α/β-Si3N4 composite from sea sponge
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Journal of Porous Materials
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Biomorphic α/β-Si3N4 composites were produced from natural sea sponge via replication method. The sponges were impregnated with a Si-containing slurry via dip-coating. After coating, the sponges were submitted to oxidation at 600°C for 1 h to decompose the bio-polymers followed by burning out of carbon, leading to a Si-skeleton. Subsequent thermal treatment at 1,450°C for 5 h under flowing nitrogen promoted the nitridation of the Si resulting in α/β-Si 3N4 with an α/β fraction of 67%. The ceramic composite maintained the original morphology of the sea sponge and exhibited a porosity of 88%. The microstructure comprised whiskers, small irregular shaped particles and rod-like hexagonal grains.
Como referenciar
RAMBO, C.R.; SIEBER, H.; GENOVA, L.A. Synthesis of porous biomorphic α/β-Si3N4 composite from sea sponge. Journal of Porous Materials, v. 15, p. 419-423, 2008. DOI: 10.1007/s10934-007-9101-y. Disponível em: http://repositorio.ipen.br/handle/123456789/5067. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.