Patent ID: 8722759
Filing Date: 2014-05-13
Classification: A61K,B82Y,C01G,C01P

Abstract:
1. A method of making a filler for a composite material, the method comprising: (a) providing a zirconia sol comprising preformed, crystalline zirconia nanoparticles with a mean diameter from about 3 nm to about 30 nm, (b) providing a silica sol comprising silica nanoparticles with a mean diameter from about 10 nm to about 100 nm, (c) combining the zirconia sol and the silica sol to form a mixture of zirconia and silica nanoparticles, (d) heating the mixture to a temperature from about 400° C. to about 1000° C. and (e) milling the heated mixture to form a filler comprising silica-zirconia nanoclusters.