Development of a β-LiAlSi2O6:Cr-based Ceramic Pigment by Proteic Sol-Gel Process Using Gelatin: Synthesis and Characterization

Ferraz, Ricardo Ferrari; Sousa, Jaine Ferreira; Costa, Da; Oliveira, Raquel Aline Pessoa; Lima, Héstia Raíssa Batista Reis

doi:10.1590/1980-5373-mr-2021-0315

Cited by 2 publications

(3 citation statements)

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“…The preparation of samples was based on Ferraz et al [11], who first produced the chromiumdoped β-spodumene ceramic pigment using the proteic sol-gel route and determined its optical behavior. The applied synthesis temperatures were based on the thermal analyzes determined by Lima et al [10], who first synthesized pure β-spodumene by this method.…”

Section: Methodsmentioning

confidence: 99%

“…It also has been evaluated for solid-state dosimetry using optically stimulated luminescence (OSL) and thermoluminescence (TL) and has shown great potential use for high gamma radiation doses detection [5][6][7][8][9][10]. Among its most recent studied applications, the use in the production of industrial ceramic pigments stands out, due to its chemical and thermal stability and the possibility of incorporating chromophore ions in its structure of lattice by high-temperature synthesis [11].…”

Section: Introductionmentioning

confidence: 99%

“…For β-spodumene ceramic pigment, the occurrence of selective absorption was produced by the addition of Cr 3+ ions into the structure. This absorption occurs in the 425 nm and 600 nm bands (violet and orange light), resulting in the complementary yellowish-green color [11].…”

Section: Introductionmentioning

confidence: 99%

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Structural and Morphological Characterization of the Chromium-doped β-Spodumene to Ceramic Pigment

Ferraz

Sousa²,

Lima³

et al. 2022

Braz. J. Rad. Sci.

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The structural and morphological properties of the novel chromium-doped β-spodumene based ceramic pigment were evaluated aiming to study its chemical and thermal stability in industrial applications. The pigment samples were synthesized by the proteic sol-gel method using gelatin as a ligand. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were performed. Rietveld refinement of experimental diffractograms and average crystallites size by the Scherrer’s method analysis were carried out. XRD results confirmed that the crystal structure of lattice corresponded to β-spodumene and the Rietveld refinement indicated the absence of structural changes with doping up to 3% of chromium. Scherrer’s method indicates that there are no trends changes in the average size of crystallites in the analyzed doping contents. SEM analysis indicated that there are no morphological changes in the chromium-doped particles. The present study concluded that structural or morphological alterations are not noticed for β-spodumene samples produced with chromium doping up to 3% by weight, and that this pigment possibly preserves the chemical and thermal stability of pure β-spodumene. The absence of changes in these properties by doping with low chromium contents were attributed to possible substitutions of Al3+ by Cr3+ ions in the β-spodumene crystal lattice.

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Section: Methodsmentioning

confidence: 99%