Investigation of the microstructure, cation distribution and optical properties of nanoscale NixMg1-xAl2O4 spinel pigments

Effects of Selected Pigments on the Properties of Silicone Resin-Based Paints

“…Most research focuses only on the properties that are supposed to be changed by the pigment (or other additive). Some studies also consider the ability of cool pigments to reduce surface temperature [12,13], the properties of organic pigments [14][15][16] and spinel pigments [17][18][19], color changes of thermochromic pigments under temperature [20][21][22], or color fading [23]. However, there are few studies testing the impact of pigments on the functional and processing properties of waterborne emulsion paints or coatings [24][25][26].…”

Green nanoceramic pigments based on cobalt chromite doped with Al: Synthesis, characterisation and colour performance

“…This material is a double oxide of a spinel-type structure with cubic symmetry and a space group of Fd-3m, and it has very important mechanical and optical properties. The substitution of chromophore ions (mainly transition metals) within these oxides makes it possible to obtain a wide variety of colours [7][8][9][10][11][12][13][14][15]. Zhang et al [16] prepared the spinel solutions Mg1−xZnxAl1.8Cr0.2O4 and studied the relationship between cation distribution and optical absorption performance in order to explain the difference in colours.…”

Transition of Cationic Local Structures in Mg1-xNixAl2O4

“…The cationic disordering naturally affects the structural properties of the spinels; hence, many investigations for the cationic local structures, including their inversion degrees, have been carried out by experimental techniques − and computational approaches. − For example, magnesium aluminate (MgAl 2 O 4 ) and nickel aluminate (NiAl 2 O 4 ) spinels are generally known as normal and inverse spinel structures, respectively. , However, their inversion degrees for synthetic specimens were also reported to be fluctuating between 0 and 1, respectively, because of cationic disordering. − Doping spinel compounds with other cations and solid-solution synthesis of the spinels are effective approaches for enhancing material properties or exploring new functionalities . However, the evaluation of the cationic local structures or their inversion degrees in such complex compounds is not easy. − Recently, E. C. O’Quinn et al reported the structure of Mg 1‑ x Ni x Al 2 O 4 using neutron total scattering to understand the cationic disordering process . High-resolution pair distribution function analysis has shown the existence of a locally ordered distortion within a long-range spinel structure because of cation exchange.…”