Journal
CERAMICS INTERNATIONAL
Volume 48, Issue 6, Pages 8729-8732Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2021.12.243
Keywords
Colour; Optical properties; Powders: solid state reaction; Inorganic blue pigment
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Funding
- Japan Society for the Promotion of Science [202110967]
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Novel environmentally friendly blue pigments were synthesized and their color properties were investigated. By doping different ions into the crystal lattice, a bright blue pigment with a higher blueness value than commercial pigments was obtained.
Novel environmentally friendly blue pigments, (Li1-xNax)(2)Cu-5(PO4)(4) (0 <= x <= 0.20), were synthesized and their color properties were investigated. By doping larger Na+ ions into Li+ ion sites, the crystal lattice was distorted, which strongly affected the d-d transition absorption nature of Cu2+. In the series of (Li1-xNax)(2)Cu-5(PO4)(4), (Li0.90Na0.10)(2)Cu-5(PO4)(4) showed a vivid blue hue with a blueness value (-b*) of 39.4 in the CIE L*a*b* system; this value is higher than that of the commercial Fe-4(III)[Fe-II(CN)(6)](3) pigment (dark blue, -b* = 19.3).
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