Preparation and Characterization of Black Zirconia Ceramics by Black Color Spinel Pigment

Effects of Metal Dopings on CuCr2O4 Pigment for Use in Concentrated Solar Power Solar Selective Coatings

“…To date, the XRD information about all other elements excluding CuCr 2 O 4 and CuCrMnO 4 has not been reported with high-quality marks. However, doped CuCr 2 O 4 all share the main peak at a 2θ angle of ∼35°, which is the main peak for spinel structure . Utilizing the Scherrer equation where τ is the average crystal size, K is a shape factor which is 0.9 in this case, λ is the X-ray wavelength which is 0.154058 nm, and β is the full width at half-maximum (fwhm), the crystal size of all the doped copper chromium oxides was calculated and is shown in Table .…”

“…However, doped CuCr 2 O 4 all share the main peak at a 2θ angle of ∼35°, which is the main peak for spinel structure. 28 Utilizing the Scherrer equation…”

Ni-free, black ceramic pigments based on Co—Cr—Fe—Mn spinels: A reappraisal of crystal structure, colour and technological behaviour

“…Despite the huge literature on spinels, just a limited number of papers have been devoted to complex compositions in the Co-Cr-Fe-Mn-Ni-V system used for black pigments, not considering the complicated stoichiometries stemming from the use of industrial residues [24][25][26][27][28][29]. Basic structural and technological results were achieved by Eppler [30,31] and by Lee et al [32][33][34][35]. The synthesis practice has demonstrated that any deviation from spinel stoichiometry brings about the formation of hematite-eskolaite [30][31][32][33][34] that is deleterious for colouring performance (turning black into brown).…”

“…The synthesis practice has demonstrated that any deviation from spinel stoichiometry brings about the formation of hematite-eskolaite [30][31][32][33][34] that is deleterious for colouring performance (turning black into brown). The best technological behaviour in ceramic glazes is that of Co 1−x Mn x Cr 2−y Fe y O 4 compositions where 0.4oxo1.0 and 0.14oyo0.72 with some nickel occasionally present [33][34][35][36]. In the case of Co-free pigments, the best behaviour in glaze applications is that of Ni 1−x Mn 2+…”

Black zirconia-graphene nanocomposite produced by spark plasma sintering

“…After sintering in oxidizing conditions, pure dense zirconia has a white color. Therefore, many studies have been performed up today for the diversification of the zirconia color [4][5][6][7][8][9]. In this regard, the black color has attracted many research works due to a wide range of possible high added-value applications, i.e.…”