Porous shaped silicon carbide bodies

The invention relates to fibre-reinforced porous shaped bodies of silicon carbide and also a process for their production, where the fibres provided for the reinforcement are first pyrolysed at temperatures between 500 DEG C and 1500 DEG C, preferably between 600 DEG C and 1200 DEG C, in vacuo or in...

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Bibliographic Details
Main Authors LORSON, HARALD, SCHULTEN, RUDOLF, DR, KUSNANTO, SAHABI, BEHZAD
Format Patent
LanguageEnglish
French
German
Published 06.09.1995
Edition6
Subjects
ARTIFICIAL STONE
CEMENTS
CERAMICS
CHEMISTRY
COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS
CONCRETE
LIME, MAGNESIA
METALLURGY
REFRACTORIES
SLAG
TREATMENT OF NATURAL STONE
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Summary:The invention relates to fibre-reinforced porous shaped bodies of silicon carbide and also a process for their production, where the fibres provided for the reinforcement are first pyrolysed at temperatures between 500 DEG C and 1500 DEG C, preferably between 600 DEG C and 1200 DEG C, in vacuo or in an inert gas atmosphere, e.g. argon, the fibres thus treated are sheathed using a silicate ester or finely divided silicon dioxide and are subsequently subjected to heat treatment at from 900 DEG C to 1300 DEG C, during which the silicon dioxide located on the fibre surface is converted into a silicon carbide layer, the fibres thus coated are then mixed with binder, silicon and silicon carbide powder of a different particle size and are uniformly mixed, and where the mixture thus obtained is placed in a mould provided for this purpose and cured at from about 130 DEG C to 180 DEG C and the cured shaped body is pyrolysed at from 800 DEG C to 1200 DEG C.
Bibliography:Application Number: EP19940114180