New vanadium doped calcium titanate ceramic pigment

Gargori, C.; Cerro, S.; Galindo, R.; Garcı́a, A.; Llusar, M.; Badenes, J.A.; Monrós, G.

doi:10.1016/j.ceramint.2011.06.027

Cited by 22 publications

(10 citation statements)

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“…2). At 1200 8C perovskite is the only crystalline phase detected in CO sample and, when x increase (Table 4), only perovskite is detected, but the color of glazed samples change from a red-pink shade at low x (L*a*b* = 46/14/2 for CO x = 0.025 sample) [9], to a dark blue color for x = 0.1 and 0.2 samples, decreasing both a* and b* parameters (L*a*b* = 45/3/À3 for CO sample x = 0.2). At 1000 8C, only CO x = 0.2 sample produce blue shade (see Table 3).…”

Section: Resultsmentioning

confidence: 99%

“…In order to avoid the crystallization of chromates, as described in [9] the optimal pigmenting sample Ca(Cr x Ti 1Àx )O 3 x = 0.015 were modified by addition of 5 wt.% of three different flux Table 1 XRD evolution of crystalline phases in ceramic powders Ca(Cr x Ti 1Àx )O 3 without mineralizer addition fired at 1000 8C/3 h and CIEL*a*b* parameters of 5% glazed powders in a conventional CaO-ZnO-SiO 2 glaze. Fig.…”

Section: Resultsmentioning

confidence: 99%

“…The authors have described the synthesis and characterization of both new ceramic pigments based on chromiumcalcium titanate (red-pink) [9] and vanadium doped calcium titanate (orange), respectively [10]. The former pigment is based on the solid solution of chromium (IV) in CaTiO 3 .…”

Section: Introductionmentioning

confidence: 99%

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Iron and chromium doped perovskite (CaMO3 M = Ti, Zr) ceramic pigments, effect of mineralizer

Gargori

Cerro

Galindo

et al. 2012

Ceramics International

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Solid solutions Ca(D x M 1Àx )O 3 (M = Ti, Zr and D = Fe,Cr), have been studied as ceramic pigment in conventional ceramic glazes using 0.5 mol/ mol of NH 4 Cl as flux agent by solid state reaction and by ammonia coprecipitation route. Ca(Cr x Ti 1Àx )O 3 compositions obtained without addition of NH 4 Cl as mineralizer, produce pink color in glazes at low x but CaCrO 4 crystallizes when x increases, producing undesired green colors. The crystallization of chromates can be avoided using NH 4 Cl as mineralizer, giving a complete solid solution that produce pink color in glazes at low x and dark blue shades at high x. Coprecipitated sample produce blue colors at low x and at low temperature than ceramic sample (1000 8C instead 1200 8C for CE sample). Cr 4+ ion acts as red chromophore, but at higher x values (blue samples) Cr 3+ ion entrance affects the color. Ca(Fe x Ti 1Àx )O 3 system crystallizes perovskite CaTiO 3 and pseudobrookite Fe 2 TiO 5 together with rutile as residual crystalline phase, glazed samples change from a yellow to a pink color associated to the increase of pseudobrookite with firing temperature. Ca(Fe x Ti 1Àx )O 3 and Ca(Cr x Zr 1Àx )O 3 systems crystallize perovskite CaZrO 3 and zirconia (ZrO 2 ) in both monoclinic and cubic polymorphs, but iron or chromium oxides are not detected in the powders. Coprecipitated sample stabilises cubic form. The solid solution is not reached completely in these samples and is not stable in glazes. #

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Iron and chromium doped perovskite (CaMO3 M = Ti, Zr) ceramic pigments, effect of mineralizer

Gargori

Cerro

Galindo

et al. 2012

Ceramics International

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“…Los autores han descrito y caracterizado recientemente dos nuevos pigmentos basados en perovskita de titanio-calcio dopada con cromo (rojo-rosa) (9) y con vanadio (naranja) (10). El primero está basado en la disolución sólida de cromo (IV) en CaTiO 3 .…”

Section: Introductionunclassified

Obtención de pigmentos cerámicos de perovskita CaTiO<sub>3</sub> dopada con cromo y vanadio por descomposición metal-orgánica (MOD)

Gargori¹,

Galindo²,

Cerro³

et al. 2012

Bol. Soc. Esp. Ceram. Vidr.

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En el trabajo se presenta la utilización de una ruta de descomposición metal-orgánica MOD (Metal Organic Decomposition), basada en la formación de quelatos por adición de un ácido policarboxílico (oxálico y cítrico) a una disolución de sales metálicas (usualmente nitratos), en la síntesis de pigmentos cerámicos de perovskita CaTiO 3 dopada con cromo y vanadio. La síntesis MOD permite el desarrollo de tintas cerámicas tipo emulsión a partir de los materiales crudos, de tintas tipo dispersión con los materiales carbonizados nanoestructurados en DEG, así como pigmentos estables en vidriados cuando los tamaños de partícula presentan tamaños y grados de cristalización suficientes. En la perovskita de CaTiO 3 modificada con un 20% de vanadio en la posición del Ti, las tintas con materiales carbonizados dispersados rinden coloraciones naranja adecuadas y la calcinación a 1000ºC produce pigmentos naranja estables frente a los vidriados. Las muestras con acomplejación molar 1,5 con policarboxilatos destacan por sus capacidades pigmentantes. En el caso de la perovskita de CaTiO 3 modificada con un 1% de cromo en la posición del Ti, se obtienen tintas por dispersión de los materiales carbonizados que producen coloraciones rosa adecuados, los materiales carbonizados a 500ºC presentan la cristalización de calcita con picos intensos en oxalatos y materiales amorfos con cítrico, por lo que presentan baja capacidad pigmentante en vidriados. La calcinación a 1000ºC produce rosas estables frente a los vidriados. Las muestras con acomplejación molar 0,25 con policarboxilatos destacan por su capacidad pigmentante.Palabras clave: pigmento cerámico, perovskita, tinta cerámica, descomposición metalorgánica. Ceramic pigments based on chromium and vanadium doped CaTiO 3 perovskite obtained by Metal Organic Decomposition (MOD).The Metal Organic Decomposition (MOD) route based on the chelation of a solution of metallic salts (usually nitrates) by policarboxylic acid (oxalic and citric), applied to the synthesis of ceramic pigments based on chromium and vanadium doped CaTiO 3 perovskite, is presented in this paper. MOD synthesis allows preparing ceramic inks using the raw emulsioned materials directly or the nanostructured charried powders at 500ºC dispersed in DEG, and also stable ceramic pigments in glazes when the particle size and crystallization are sufficiently. In the CaTiO 3 perovskite 20% molar modified with vanadium in the Ti position, ceramic inks using charried powders produce adequate orange shades and the fired powders at 1000ºC produce adequate orange colours in glazes. Samples of 1.5 molar addition of policarboxylic acids show the best pigmenting properties. In the case of CaTiO 3 perovskite 1% molar modified with chromium in the Ti position, ceramic inks using charried powders produce adequate pink shades and the fired powders at 1000ºC produce adequate pink colours in glazes. Samples of 0.25 molar addition of policarboxylic acids show the best pigmenting properties. Vol 51, 6, 343-352, noviembre-Diciembre 2012 iSSn 0366-3...

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“…Various chemical methods, such as conventional ceramic method [2,14,15], combustion synthesis, co-precipitation [16], sol-gel method [2,17], polymeric precursor [1,18], microwave synthesis [19], and others, have been used to synthesize inorganic pigments. The complex polymerization method (CPM) based on the Pechini method offers the possibility of preparing complexes of good homogeneity at molecular scale and a good stoichiometric control.…”

Section: Introductionmentioning

confidence: 99%

Influence of variables on the synthesis of CoFe2O4 pigment by the complex polymerization method

et al. 2015

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Synthetic inorganic pigments are most widely used in ceramic applications due to their excellent chemical and thermal stability and their lower toxicity to both human and environment as well. In the present work, black ceramic pigment CoFe 2 O 4 has been synthesized by the complex polymerization method (CPM) with good chemical homogeneity. In order to study the influence of variables on the process of obtaining pigment through CPM, 2 (52) fractional factorial design with resolution III was used. The variables studied in the mathematical modeling were: citric acid/metal concentration, pre-calcination time, calcination temperature, calcination time, and calcination rate. Powder pigments were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and UV-visible (UV-Vis) spectroscopy. Based on the results, the formation of cobalt ferrite phase (CoFe 2 O 4 ) with spinel structure was verified. The color of pigments obtained showed dark shades, from black to gray. The model adjusted to the conditions proposed in this study due to the determination coefficient of 99.9% and variance (R²) showed that all factors are significant at the confidence level of 95%.

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New vanadium doped calcium titanate ceramic pigment

Cited by 22 publications

References 15 publications

Iron and chromium doped perovskite (CaMO3 M = Ti, Zr) ceramic pigments, effect of mineralizer

Iron and chromium doped perovskite (CaMO3 M = Ti, Zr) ceramic pigments, effect of mineralizer

Obtención de pigmentos cerámicos de perovskita CaTiO<sub>3</sub> dopada con cromo y vanadio por descomposición metal-orgánica (MOD)

Influence of variables on the synthesis of CoFe2O4 pigment by the complex polymerization method

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