POROUS COARSE GRANULE OF TIN OXIDE HAVING SOLID SOLUTION OF ANTIMONY OXIDE

摘要

PURPOSE:To obtain the title porous coarse granules of tin oxide capable of being milled into uniform particles smaller than wave length of visible light ray by simple milling in production of coating compound, comprising tin oxide having a given amount of solid solution of antimony oxide, by lightly sintering primary particles having very small particle diameters into coarse granules having desired particle diameter. CONSTITUTION:Porous coarse granules of tin oxide having solid solution of antimony oxide in the following weight ratio are provided by lightly sintering primary particles mutually having =0.05mu primary particle diameter into coarse granules having 0.2-5mu diameter in a porous state. Namely, the porous coarse granules have 0.01-1.0 based on weight ratio of antimony oxide as solid solution. The porous granules have an electrical resistance value of 10 deg.OMEGA.cm order, further comprise the primary particles having =0.05mu particle diameter and a great number of void pores and are porous. Consequently, in processing the coarse granules into a coating compound, the granules can be milled into uniform particles smaller than wavelength of visible light ray by simple milling.