Nonhydrolytic Sol−Gel Process: Aluminum Titanate Gels

摘要: The efficiency of the nonhydrolytic sol−gel process based on condensation between metal chlorides and alkoxides has been studied in preparation aluminum titanate gels. Solutions titanium precursors ratio Al/Ti = 2 gave gels with same ratio. structural evolution samples is unusual; they directly crystallize at T > 600 °C into metastable pseudo-brookite β-Al2TiO5 are reluctant to decompose stable TiO2 (rutile) α-Al2O3 1150 °C. This behavior must be connected high homogeneity originating from process.