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Preparation method of acicular mullite porous ceramic block material with superhigh amount of porosity
The present invention discloses a preparation method of mullite porous ceramic with cluster-like whisker structure. The method is as below: dispersing aluminum hydroxide, silica, aluminum fluoride and vanadium pentoxide powder in a polyvinyl alcohol (PVA) aqueous solution; mixing evenly and freezing in a mold; separating PVA and water; crosslinking a PVA molecular chain, and curing the ceramic powder by the PVA molecular chain and ice; and then freeze-drying, batching and sintering to obtain the mullite porous ceramic with in-situ grown whiskers, porosity of 50%-90%, and compressive strength of 2-15 MPa. The present invention can be applied to the fields of muffler noise reduction, catalyst carrier and gas-solid separation.
Preparation method of acicular mullite porous ceramic block material with superhigh amount of porosity
The present invention discloses a preparation method of mullite porous ceramic with cluster-like whisker structure. The method is as below: dispersing aluminum hydroxide, silica, aluminum fluoride and vanadium pentoxide powder in a polyvinyl alcohol (PVA) aqueous solution; mixing evenly and freezing in a mold; separating PVA and water; crosslinking a PVA molecular chain, and curing the ceramic powder by the PVA molecular chain and ice; and then freeze-drying, batching and sintering to obtain the mullite porous ceramic with in-situ grown whiskers, porosity of 50%-90%, and compressive strength of 2-15 MPa. The present invention can be applied to the fields of muffler noise reduction, catalyst carrier and gas-solid separation.
Preparation method of acicular mullite porous ceramic block material with superhigh amount of porosity
HAO LI (Autor:in) / JIANBAO LI (Autor:in) / YONGJUN CHEN (Autor:in) / LEI DONG (Autor:in) / LIJIE LUO (Autor:in) / LIHUA CAO (Autor:in)
25.11.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
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