The invention relates to the field of technical ceramics and specifically
relates to a method of synthesis for aluminum oxides of different
crystalline structure and to the products obtained by the method. The aim
of the invention is to provide a method of producing redispersible
nanoparticulate corundum and nanoporous Al.sub.2 O.sub.3 sintered
products, the method using precursors and being viable on a commercial
scale. To this aim, inter alia, a method of producing redispersible
nanoparticulate corundum of an average particle size of D.sub.50<100 nm
is used which method includes the addition of crystal nuclei. According to
the method, organic or chlorine-free inorganic precursors are dissolved or
processed to a sol and hydrolyzed. The substance is then dried and
calcinated at temperatures of between 350 and 650.degree. C. and is then
further heated by increasing the temperature to .ltoreq.950.degree. C. The
aim of the invention is also attained by using a method of producing
nanoporous Al.sub.2 O.sub.3 sintered products according to which organic
or chlorine-free inorganic precursors are dissolved or processed to a sol
and hydrolyzed. The substance is then dried and calcinated at temperatures
of between 350 and 750.degree. C.
