The structural evolution and optical properties of Mg1-xZnxAl1.8Cr0.2O4 pink ceramic pigments

Effective synthesis of green nano‐sized ceramic pigments by co‐doping Zn2+, Cr3+ and Sm3+ into the cobalt‐aluminate

“…Generally, v 3 = [ 4 A 2 (F) → 4 T 1 (P)] shows three frequencies, and the coordination among the three causes Co 2+ ions to generate the blue color. Under the condition of higher Cr 3+ content (Cr:Sm = 1.2:0,1.17:0.03), absorption peak at 420 nm can be observed, which is attributed to 4 A 2g (F) → 4 T 1g (F) absorption of the octahedrally coordinated Cr 3+ ions. While the increase of bonding between Sm 3+ ions and ligands would cause a red-shift of spectral line (507 → 510 → 516 → 521 nm).…”

“…Spinel ceramic oxides have been attracting more and more attentions due to their good properties of light, magnetism, heat-resistance, semiconductors, etc [1][2][3][4] The general formula of spinel crystals can be expressed as A 2+ B 3+ 2 O 4 , and their structure can be classified as a cubic with the anions arranged in a cubic close-packed lattice. In order to achieve charge balance, cations A and B occupy the void sites of a four-coordinated tetrahedron and a six-coordinated octahedron, respectively, called as normal spinel structure.…”

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

“…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.…”

The effect of mineralizer addition and temperature on synthesis of malayaitepink pigment

“…As well known, the pigments which are made of synthetic ceramics are being extensively exploited in producing colored glazed or unglazed tiles (Siddall, 2018; Gargori et al , 2017; Zhang et al , 2019; Fiuza et al , 2018). For using mineral pigments in production of the colored ceramic products, the ceramic pigments must have a high melting point.…”