| abstract |
【Task】 Coated inorganic oxide ultrafine particles with a high refractive index and excellent transparency, dispersibility, light resistance, weather resistance, etc., a sol solution in which the ultrafine particles are dispersed in water or an organic solvent, and a high concentration of the ultrafine particles A composition for encapsulating a semiconductor light-emitting device dispersed in the above and an optical member comprising the same are provided. [Solution] Semiconductor light emission containing coated oxide ultrafine particles having a refractive index of 1.5 to 2.8 and having a rutile titanium oxide ultrafine particle as a nucleus and a coating layer made of silicon oxide provided by a specific method An element sealing composition, and an optical member comprising the same. [Selection figure] None |