Amino-acid-assisted preparation of CoAl2O4/kaolin hybrid pigments

Zhang, Anjie; Wang, Naidi; Mu, Bin; Li, Huaming; Wang, Aiqin

doi:10.1016/j.clay.2020.105611

Cited by 4 publications

(1 citation statement)

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“…In the range from 240 to 310 °C, the stair of weight loss indicates the transformation of precursors to the crystal phase [32]. From the relative DSC curve, a specific exothermic peak occurs at 282 °C, probably related to the burning of ethanol [33].…”

Section: Crystal Phases After Heat Treatment At Different Temperaturesmentioning

confidence: 99%

Effects of Coloration of Spinel CoAl2O4 Cobalt Blue Pigments: Composition, Structure, and Cation Distribution

Zhang,

Li,

et al. 2023

Inorganics

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Cobalt blue ceramic pigments mainly consisting of CoAl2O4 are subject to the difficulty of color control. Here, a perspective is reported regarding research on the reasons for color change based on the control of the heat treatment and ratio of components. Macroscopically, the composition of pigment powders determines the color. Microscopically, the crystallite characters including size, cation distribution, and structure have an important effect on the color. The ingredient, structural, and color properties of the pigment powders are analyzed using thermo gravimetry–differential scanning calorimetry (TG–DSC), X-ray diffraction (XRD) measurement, Rietveld refinement, energy dispersive spectrometer (EDS), and colorimetry analysis. The color is proven to be associated with cation distribution, such as that of Co2+ and Co3+. It is indicated that high heating temperature, long heating time, and a large proportion of Al3+ can, respectively, induce the Co2+ and Al3+ in tetrahedral and octahedral sites.

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Section: Crystal Phases After Heat Treatment At Different Temperaturesmentioning

confidence: 99%