05322826 is referenced by 11 patents and cites 20 patents.

The invention relates to a material which is refractory, porous, resistant to fluorine-containing gases, stable in its volume and heat-insulation, particularly in the form of formed bricks, for a refractory, heat-insulating lining in electrolytic cells, in which metal aluminum is extracted by electrolysis from aluminum oxide dissolved in a fluoride melt; the material has an Al.sub.2 O.sub.3 content of over 50 wt % and a TiO.sub.2 content of 2.5-10 wt % and during the action of fluorine-containing gases at temperatures between 700.degree. and 1000.degree. C. in the area of the material exposed to the fluorine gas, on free surfaces, particularly at the boundary surfaces of intergranular hollow spaces, needle-shaped TiO.sub.2 crystals and/or TiO.sub.2 -containing crystals are formed, growing without regularity into the porous space. The invention furthermore relates to a method for the manufacture as well as the use of the refractory material.

Title
Refractory material
Application Number
7/891445
Publication Number
5322826
Application Date
May 29, 1992
Publication Date
June 21, 1994
Inventor
Fred Brunk
Hattingen
DE
Wolfgang Becker
Dusseldorf
DE
Agent
Jones & Askew
Assignee
Dr C Otto Feuerfest
DE
IPC
C04B 35/46
C04B 35/10
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