HEAT RAY SHIELDING PARTICLE, MANUFACTURING METHOD OF HEAT RAY SHIELDING PARTICLE, HEAT RAY SHIELDI

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PROBLEM TO BE SOLVED : To provide a heat ray shielding particle excellent in weather resistance. SOLUTION : There is provided a heat ray shielding particle which is a particle containing composite tungsten oxide, which contains M element (M : one or more kind of element selected from H, He, alkali metals, alkali earth metals, rare earth elements or the like), tungsten and oxygen with seat occupancy of the M element (S) of 85% or more, has one or more kind of crystal structure selected from tetragonal crystal, cubic crystal, hexagonal crystal, and monoclinic crystal, lattice strain of the tungsten oxide composite calculated by an X ray diffraction method of 0.25% or less, and average particle diameter of 5 nm to 200 nm. SELECTED DRAWING : Figure 2 COPYRIGHT : (C)2019, JPO&INPIT