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A platform for research: civil engineering, architecture and urbanism
Espuma cerámica cocida porosa, su procedimiento de fabricación y su utilización
Espuma cerámica cocida porosa que presenta una porosidad total comprendida entre 50 y 92% y una porosidad intergranular de por lo menos 5%, siendo la porosidad intergranular formada por unos poros de un tamaño inferior a 10 μm, teniendo más del 15% de los poros celulares un tamaño superior a 300 μm, comprendiendo la espuma carburo de silicio recristalizado.
A method of manufacturing a porous ceramic part, comprising the following steps in succession: a) preparing a mixture M containing a ceramic powder in suspension, at least one gelling agent and at least one foaming agent, at a mixing temperature which is higher than the gelling temperature of the gelling agent; b) shearing the mixture M at a foaming temperature which is higher than the gelling temperature, to obtain a foam; c) gelling the foam by cooling the mixture M to a temperature below the gelling temperature of the gelling agent; and d) drying the gelled foam to obtain a perform. According to the invention, a stabilizing agent is added to the mixture M, which agent has an instantaneous viscosity, in Pa·s, that increases by a factor of at least ten when a shear rate of the stabilizing agent is reduced from 100 s-1 to 0.
Espuma cerámica cocida porosa, su procedimiento de fabricación y su utilización
Espuma cerámica cocida porosa que presenta una porosidad total comprendida entre 50 y 92% y una porosidad intergranular de por lo menos 5%, siendo la porosidad intergranular formada por unos poros de un tamaño inferior a 10 μm, teniendo más del 15% de los poros celulares un tamaño superior a 300 μm, comprendiendo la espuma carburo de silicio recristalizado.
A method of manufacturing a porous ceramic part, comprising the following steps in succession: a) preparing a mixture M containing a ceramic powder in suspension, at least one gelling agent and at least one foaming agent, at a mixing temperature which is higher than the gelling temperature of the gelling agent; b) shearing the mixture M at a foaming temperature which is higher than the gelling temperature, to obtain a foam; c) gelling the foam by cooling the mixture M to a temperature below the gelling temperature of the gelling agent; and d) drying the gelled foam to obtain a perform. According to the invention, a stabilizing agent is added to the mixture M, which agent has an instantaneous viscosity, in Pa·s, that increases by a factor of at least ten when a shear rate of the stabilizing agent is reduced from 100 s-1 to 0.
Espuma cerámica cocida porosa, su procedimiento de fabricación y su utilización
HIS CHRISTIAN (author) / PRIGENT SAMUEL (author) / SCALABRINO MATTEO (author) / VILLERMAUX FRANCELINE (author)
2018-01-11
Patent
Electronic Resource
Spanish
IPC:
C04B
Kalk
,
LIME
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