アルコキシド法による単分散球状ムライト微粉体の合成

概要

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Monodispersed, spherical fine munite powders were prepared by hydrolysis of Al Si alkoxide in alcohol/ dipolar aprotic solvent. The addition of dipolar aprotic solvent to Al Si alkoxide/alcohol solutions caused precipitation of Al Si double alkoxide emulsion. Acetonitrile was most efficient of all dipolar aprotic sol vent for the formation of monodispersed fine mullite powders. Monodispersed fine mullite powders were obtained when the volurne ratio of octanol/acetonitrile was 3 : 2. Synthesis factors such as reagent concentra tion, volume ratio of solvent and reaction temperature infiuenced the formation of monodispersed fine mullite powders. The Al_2O_3/SiO0_2 ratio of as prepared powders determined by ICP analysis was about 3 : 2. Powder X ray diffraction showed that as prepared powders were amorphous and crystallized to mullite at 1000℃. The spherical morphology was retained after the crystalli zation .
社団法人日本セラミックス協会の論文
1994-08-01