Preparation of Filling Materials for Antifouling Mineral Paint using Rare Earth and Their Anion Emission Properties

摘要

Tourmaline has unique electrical properties originated from its crystal structure such as pyroelectricity, piezioelectricity and emission of anion. These properties can derivate the making of feeble current around 0.06 raA. This weak current enables to electrolyze continuously and to make the hydroxyl anion, which may play a role of surface active agent against fouling of ocean organism. Two kinds of the mixture, tourmaline-monazite-quartz and tourmaline-monazite-illite-zeolite, were tested for the filling materials of antifouling paints. As a whole, the anion emits actively, at least around 4000 negative ion/cc. This high emission property maintains constantly for long time over 500 days. This implies that the tourmaline mixture treated mechanochemically can emit anion over 4000 negative ion/cc for a long time. These results enable us to make possible for application of the tourmaline containing mixture as the filling materials of antifouling paint