| 摘要 |
PROBLEM TO BE SOLVED: To provide heat-ray-shielding microparticles having high transmittance of light with a wavelength of 700-1,200 nm compared to conventional composite tungsten oxide microparticles, and heat-ray-shielding microparticle fluid dispersion using the heat-ray-shielding microparticles.SOLUTION: The heat-ray-shielding microparticles are provided which are composite tungsten oxide microparticles represented by general formula AMWO. In the general formula, an element A is one kind or more of elements selected from Mo,Ru,Cr,Ni,V,Co,Fe,Mn,Ti,Ge,Sn,Ga,Pb,Bi,In,Sb,Pd and Tl; M is one kind or more of elements selected from alkali metal and alkali earth metal; W is tungsten; and O is oxygen. The heat-ray-shielding microparticles satisfy expressions of 0.001≤a/b≤0.1, 0.20≤b/(a+c)≤0.61 and 2.2≤d/(a+c)≤3.0 and have a hexagonal crystal structure. The heat-ray-shielding microparticle fluid dispersion using the heat-ray-shielding microparticles is also provided.SELECTED DRAWING: None |
