Formation of perovskites MTiO3 (M = Ba, Sr) at low temperature (< 100 degre
esC) by heterogeneous reactions of M(OH)(2) aqueous solutions with hydrolys
is products of Ti(OBu)(4) is discussed. Reaction products are characterized
by means of chemical and X-ray analysis, and electron microscopy. Reaction
rate is enhanced by hydroxide concentration and reaction temperature, and
increases drastically when Sr(OH)(2) is used instead of Ba(OH)(2). Particle
s shape and size of the perovskites formed is independent of morphology of
Ti(OBu)(4) hydrolysis product. The main factor of perovskites morphology re
gulation lies in the rate of M(OH)(2) absorption. Lowering the absorption r
ate allows us to prepare uniform perovskite powders which can be readily si
ntered to ceramic bodies with high dielectric permittivity.