NEAR INFRARED TRANSMITTING COPPER OXIDE NANOPARTICLES
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United States of America
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Issued Date -
Jan 20, 2022
app pub date -
Jul 15, 2020
filing date -
Jul 15, 2020
priority date (Note) -
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Abstract
A black IR reflective or transmissive pigment from which LiDAR responsive black coatings can be formed where the pigment displays a Blackness My value similar to non-IR reflective carbon black. The CuO particles display small crystallites of less than 18 nm and an (−111)/(111) reflectance intensity ratio of less than 1.2. A method of forming the CuO particles includes precipitation of CuCO3 or CuCO3/Cu(OH)2 using an alkali carbonate as a precipitant and calcining the precipitate at about 300° C. to about 400° C.
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