K_2O-TiO_2系ガラスを出発原料としたチタン酸カリウム繊維の水熱合成

概要

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The finding that the addition of seed crystals promoted the formation of potassium titanate fibers from TiO2 under hydrothermal conditions. using titanium dioxide, led us to the idea that the rate determining step might be the supply of the polyions with structure related to the fiber crystals.To supply the poly-ions the present authors used a glass of the system K2O-TiO2 as starting material instead of TiO2. With use of the glass (the composition being around K3TiO3.5), the synthesis rate of potassium titanate fibers was increased. The glass was superior to titanium oxide on the following points; 1) homogeneity, 2) larger solubility, 3) including the structure related to the fiber crystals and 4) easiness in choosing grain size and shape.Non-crystalline fibers were also obtained from the glass under hydrothermal conditions, which was later converted into crystalline fibers by heating at above 950°C.The addition of seed crystals to the glass further improved the formation rate.
社団法人日本セラミックス協会の論文
1975-06-01