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%.
在这些金属氧化物微粒中,金属氧化物微粒的表面由具有 5 个或更多和 14 个或更少碳原子且具有支链的
脂肪酸修饰,金属氧化物是从 Zn、In、Sn 和 Sb 组成的组中选出的多种
金属的金属氧化物,微粒的平均粒径为 80 nm 或更小。在用于形成红外线屏蔽膜的分散液中,金属氧化物微颗粒分散在疏
水性溶剂中,在 800 纳米到 1 100 纳米的波长范围内,透光率为 20% 或以上,低于 70%。