发明名称 |
METHOD OF OBTAINING POROUS CERAMICS |
摘要 |
The invention relates to a method of obtaining porous ceramics.More specifically, the invention relates to a method of producing a porous ceramic piece, comprising the following successive steps: (a) preparation of a mixture M containing a suspended ceramic powder, at least one gelling agent and at least one foaming agent, at a mixing temperature greater than the gelling temperature of the gelling agent; b) shearing of mixture M at a foaming temperature greater than the gelling temperature, until a foam is obtained; c) gelling of the foam, consisting in cooling mixture M to a temperature lower than the gelling temperature of the gelling agent and d) drying of the gelled foam such as to obtain a preform. According to the invention, a stabilising agent is added to mixture M, said agent having a viscosity which increases by at least a factor ten when a shearing speed of the stabilising agent falls from 100 s<SUP>-1</SUP> to 0 s<SUP>-1</SUP>. |
申请公布号 |
WO2006018537(A3) |
申请公布日期 |
2006.05.04 |
申请号 |
WO2005FR01941 |
申请日期 |
2005.07.26 |
申请人 |
SAINT-GOBAIN CENTRE DE RECHERCHES ET D'ETUDES EUROPEEN;TARDIVAT, CAROLINE;MERCIER, EMMANUEL;HIS, CHRISTIAN;VILLERMAUX, FRANCELINE |
发明人 |
TARDIVAT, CAROLINE;MERCIER, EMMANUEL;HIS, CHRISTIAN;VILLERMAUX, FRANCELINE |
分类号 |
C04B35/624;C04B38/00 |
主分类号 |
C04B35/624 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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