Abstract: In these metal oxide microparticles, surfaces of microparticles of a metal oxide are modified by a fatty acid having 5 or more and 14 or less carbon atoms and having a branched chain, the metal oxide is metal oxides of a plurality of kinds of metals selected from the group consisting of Zn, In, Sn, and Sb, and an average particle diameter of the microparticles is 80 nm or less. In a dispersion for forming an infrared-shielding film, the metal oxide microparticles are dispersed in a hydrophobic solvent, and a light transmittance in a wavelength range of 800 nm to 1,100 nm is 20% or more and less than 70%.

Abstract: An infrared shielding film is an infrared shielding film including: an organic binder; and a plurality of tin-doped indium oxide particles (ITO particles) dispersed in the organic binder, in which the average center-to-center distance between adjacent particles of the ITO particles is in a range of 9 nm or more and 36 nm or less, the ratio of the average center-to-center distance between the adjacent particles to the average primary particle diameter of the ITO particles is in a range of 1.05 or more and 1.20 or less, and a roughness Ra of a film surface is in a range of 4 nm or more and 50 nm or less.

Abstract: In these metal oxide microparticles, surfaces of microparticles of a metal oxide are modified by a fatty acid having 5 or more and 14 or less carbon atoms and having a branched chain, the metal oxide is metal oxides of a plurality of kinds of metals selected from the group consisting of Zn, In, Sn, and Sb, and an average particle diameter of the microparticles is 80 nm or less. In a dispersion for forming an infrared-shielding film, the metal oxide microparticles are dispersed in a hydrophobic solvent, and a light transmittance in a wavelength range of 800 nm to 1,100 nm is 20% or more and less than 70%.