| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a black powder having a high degree of blackness and an excellent light shielding property to blue light, and preferably having a high insulating property. <P>SOLUTION: The blue color-shielding black powder is composed of one or two oxynitrides of vanadium and niobium, wherein the content of oxygen is≤16 wt.% and the content of nitrogen is≥10 wt.%; the transmittance X at 450 nm in a transmission spectrum of a dispersion liquid of 50 ppm in powder concentration is≤10.0%; the ratio of the transmittance X at 450 nm and the transmittance Y at 550 nm (X/Y) is≤2.0; and the ratio of the transmittance X at 450 nm and the transmittance Z at 650 nm (X/Z) is≤1.5. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
