Temperature stabilized, pyrogenically produced aluminum oxide-mixed oxide, the process for its production and use
AssigneeDegussa AG
InventorsPeter Kleinschmit, Rudolf Schwarz
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Abstract
There is provided temperature stabilized pyrogenically produced aluminum oxide-mixed oxide having a BET surface area of 50 to 200 m.sup.2 /g which contains 0.5 to 20 weight % silicon dioxide as a constituent thereof. Because of the silicon dioxide constituent the aluminum oxide does not change into the .alpha.-Al.sub.2 O.sub.3 phase until 1350.degree. C. The temperature stabilized aluminum oxide-mixed oxide is suitable for the production of thermal insulation compositions.
Claims16
Temperature stabilized, pyrogenically produced aluminum oxide-silicon dioxide mixed oxide having a BET surface area of 50 to 200 m.sup.2 /g, the silicon dioxide being 0.5 to 20 weight % of the mixed oxide, the balance of the mixed oxide consisting essentially of aluminum oxide.
Dependencies are inferred from the claim text.