Study on synthesis and properties of Na+-La3+ co-doped γ-Ce2S3 pigment by low-temperature self-propagating combustion method / Boyuan Wu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 4 (07/2024)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 21, N° 4 (07/2024) . - p. 1421-1430 Titre : Study on synthesis and properties of Na+-La3+ co-doped γ-Ce2S3 pigment by low-temperature self-propagating combustion method Type de document : texte imprimé Auteurs : Boyuan Wu, Auteur ; Yueming Li, Auteur ; Fusheng Song, Auteur ; Kai Li, Auteur ; Yi Sun, Auteur ; Zhumei Wang, Auteur Année de publication : 2024 Article en page(s) : p. 1421-1430 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation Chromaticité Valeur représentant la qualité d’une couleur sans comprendre sa luminance. Si deux lumières comprennent la même distribution spectrale normalisée par l’intensité, elles ont la même chromaticité, mais non pas vice versa. Particules -- Morphologie Pigments -- Synthèse Stabilité thermique Taille des particules Index. décimale : 667.2 Colorants et pigments Résumé : Na+-La3+ co-doped γ-Ce2S3 (abbreviated as γ-Na0.5Ce2.5 - xLaxS4) pigments with a fixed Na/(Ce1 - xLax) molar ratio of 0.2 (x = 0, 0.1, 0.5, 0.9, 1.3, 1.7, 2.1 and 2.5) were synthesized by low-temperature self-propagating combustion method. By adjusting the La3+ doping ratio, a series of γ-Na0.5Ce2.5 - xLaxS4 pigments with different colors were obtained by sulfurizing at 900°C for 2 h using CS2 as the sulfur source. The effects of La3+ doping amount on the synthesis of γ-Ce2S3, crystal structure, color performance, and temperature stability were systematically studied. The results show that the pigments exhibited a single cubic γ-Ce2S3 phase throughout the range of x increasing from 0 to 2.5. Compared with the co-precipitation method, the particle size of the pigment obtained by the low-temperature self-propagating combustion method decreased from 620 to 310 nm. Furthermore, as La3+ content increased, the band gap of the sample gradually increased from 2.06 to 2.90 eV, causing the color to change from red (L* = 39.42, a* = 40.35, b* = 30.28) to orange-red (L* = 49.15, a* = 35.51, b* = 40.64), then to orange-yellow (L* = 54.85, a* = 28.53, b* = 37.30), and finally to white-blue (L* = 66.66, a* = - 1.42, b* = 11.25). In addition, the thermal stability of γ-Na0.5Ce2.5 - xLaxS4 was evaluated by TG-DSC and its thermal stability increased from 350 to 480°C. Note de contenu : - EXPERIMENTAL : Precursor preparation - Sulfuration - Characterization - RESULTS AND DISCUSSION : Phase and structure analysis - Morphology, element content and distribution and particle size analysis - Chromaticity analysis - Temperature stability analysis DOI : https://doi.org/10.1007/s11998-023-000904-1 En ligne : https://drive.google.com/file/d/1OMWxzACQkSzKLVYqBCDbVu-TJqqeJ5IS/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41308 [article]

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