Hibonite Blue: A New Class of Intense Inorganic Blue Colorants.

ABSTRACT: Commercially available spinel cobalt blue (CoAl₂O₄) utilizes a significant amount of carcinogenic Co²⁺, which makes its synthesis more hazardous and environmentally harmful. Considerable effort has been put into developing more environmentally benign and robust blue pigments to replace cobalt blue. A new class of blue pigments with tunable hue were prepared. The solid solution series, CaAl_12-2x Co _x Ti _x O₁₉ (0 < x ≤ 1), crystallizes in a hexagonal mineral hibonite (CaM₁₂O₁₉) structure with five distinct crystallographic sites for M cations (M = Al, Co, and Ti). The origin of intense blue color is attributed to a synergistic effect of allowed d-d transitions

SUBMITTER: Duell BA 

PROVIDER: S-EPMC6933758 | biostudies-literature | 2019 Dec

REPOSITORIES: biostudies-literature