摘要:
An inventive titanium dioxide particle has 70 to 95 wt % crystalline anatase, a BET specific surface area of 65 to 120 m2/g, and an oil absorption being 70 to 90 ml/100 g measured by the method according to JIS K5101, which particle exhibits uniformity, excellent preservability and dispersibility in an acidic aqueous solution. There is disclosed a photovoltaic device 10 which comprises a light-transmittable base material 11, and a porous film 21b formed on the base material 11, in which a dye is absorbed, and the porous film 21b having the dye absorbed thereon contains the inventive titanium dioxide particle.
摘要:
An ultrafine particle silicon dioxide which comprises silicon dioxide powders in the range of ultrafine particles having a BET specific surface area of 350 m2/g or more and has a ratio of BET/CTAB specific surface areas of 0.6 to 1.1, a number average of primary particle diameters of 1 to 20 nm, void volume measured with a mercury porosimeter of 0.1 to 1.0 ml/g and linseed oil absorption of 350 to 600 ml/100 g. According to the present invention, the ultrafine particle silicon dioxide can provide various kinds of polymers with excellent mechanical strength and transparency as a filler.