金属アルコキシドから合成されたSrTiO_3微粒子の水系分散に関するポリオキシエチレン系界面活性剤の効果とそのSrTiO_3膜形成に及ぼす影響

概要

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Dispersion effect of polyoxyethylene-type surfactants on aggregation of alkoxide-derived SrTiO_3 particles in water as well as the influence of these surfactants for preparation of SrTiO_3 ceramic sheets were studied. Seven kinds of surfactants were examined. Among these surfactants, a surfactant having carboxyl group was effective on dispersing aggregated of SrTiO_3 particles. This surfactant was soluble in water. The surfactant solution behaved as a Newtonian fluid. The density and viscosity of the 7.5 mass% surfactant solution were 1.0411 g・cm^<-3> and 2.3 mPa・s. The green sheet could be prepared using a SrTiO_3 particles - water system suspension in which aggregation of SrTiO_3 particles was controlled by addition of the surfactant. This green sheet was composed of fine particles with a diameter of less than 1 μm. These constituent particles of the green sheet were finer than that in the green sheet formed without the addition of surfactant. SrTiO_3 ceramic sheets could be obtained with successive sintering of the green sheets at 1300℃.
社団法人日本セラミックス協会の論文
1998-10-01