The reaction of Ba(OH)2 solution wi

The reaction of Ba(OH)2 solution with TiO 2 leads, depending on the conditions, to TiO2/BaTiO 3 mixtures or to BaTiO 3. Under relatively mild conditions the reaction leading to BaTi03 is nearly complete when using anatase, whereas with rutile the reaction occurs only to a small extent. Only reactions with highly dispersed anatase lead to complete BaTiO 3 formation. An analogous situation can be found for hydrothermal experiments. The study of the sintering behaviour shows that BaTiO 3 powders obtained by reaction of Ba(OH)2 solution with highly reactive anatase can be densified effectively at temperatures >1200°C.