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AssigneeMitsubishi Materials Corporation
InventorsAkira Nishihara, Toshiharu Hayashi, Masahiro Sekiguchi
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An infrared-ray cutoff material having a structure in which tin-doped indium oxide powder (ITO) powder is dispersed in an inorganic or organic matrix. The material can be in the form of a coating on a substrate available by applying a composition comprising ITO powder, a binder (an organic resin and/or a metal alkoxide) and a solvent (an organic solvent, water and/or alcohol) onto the substrate and drying the same. It may also be in the form of a film, a sheet, a fiber or other shape available by forming a composition made by dispersing ITO powder in an organic polymer. The ITO powder should preferably have an x-value of from 0.220 to 0.295 and a y-value of from 0.235 to 0.352 on the xy chromaticity scale, a lattice constant of from 10.110 to 10.160 .ANG., and a minimum cutoff wavelength of up to 1,000 nm. The infrared-ray cutoff material of the present invention is transparent within the visible region and can totally cut off infrared rays of wavelengths ranging from relatively shorter ones.
An infrared-ray cutoff material which comprises a tin-doped indium oxide powder dispersed in an organic or inorganic matrix, said powder having a color tone on the xy chromaticity scale represented by an x-value of from 0.220 to 0.295 and a y-value of from 0.235 to 0.325, and said powder having a crystal lattice constant within a range of from 10.110 to 10.160 .ANG..
A tin-doped indium oxide powder having an infrared-ray cutoff function, which has a color tone as represented on the xy chromaticity scale of an x-value within a range of from 0.220 to 0.295 and a y-value within a range of from 0.235 to 0.325, a lattice constant within a range of from 10.110 to 10.160 .ANG., and a minimum cutoff wavelength of up to 1,000 nm in or near the infrared region.
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