Aggregates of hexaboride fine particles, hexaboride fine particle dispersion, hexaboride fine particle dispersion, hexaboride fine particle dispersion, transparent substrate, infrared absorbing film and infrared absorbing glass

摘要

To provide transparent new near-infrared absorbing fine particles having broad near-infrared absorption. Aspect ratio [major axis length] / [minor axis length when the particle shape is roughly regarded as a spheroid, out of the number of fine particles contained in the aggregate. ] Is a hexaboride fine particle aggregate in which fine particles having a particle size of 1.5 to less than 5.0 are 20% to less than 80%, and fine particles having a particle size of 5.0 to less than 20.0 are 20% to less than 80%. provide.