THE INFLUENCE OF ADDITIONS OF NANOSTRUCTURED AL_2O_3-POWDER ON THE HIGH TEMPERATURE STRENGTH OF HIGH ALUMINA REFRACTORIES

摘要

High surface area oxides like titania or alumina are commonly produced by high temperature flame processes like flame hydrolysis. Products from flame hydrolysis are so-called "nanostructured" oxides. The term "nanostructured" means that the material is composed of nano-scaled primary particles that are sintered in the production process to form aggregates connected by solid bridges. These oxides are very sinter-active, that means that for instance nanostructured alumina fully densities at temperatures.