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Boletín de la Sociedad Española de Cerámica y Vidrio
Article . 2016 . Peer-reviewed
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Espinela Li2CoTi3O8 nanométrica obtenida para aplicación como pigmento

Authors: Da Câmara, Maria Suely Costa; Pimentel, Lidiane Alves; Longo, Elson; Da Nobrega Azevedo, Luciano; De Araújo Melo, Dulce Maria;

Espinela Li2CoTi3O8 nanométrica obtenida para aplicación como pigmento

Abstract

ResumenLos pigmentos son materiales ampliamente utilizados en cerámica, cosméticos y tintas, entre otras aplicaciones. Para esto deben ser monofásicos y fácilmente reproducibles. Por otro lado, los pigmentos obtenidos en escala nanométrica son más estables, reproducibles y resaltan el color en pequeñas cantidades comparados con los obtenidos en escala micrométrica. Los óxidos mixtos con estructuras del tipo espinela AB2O4 tienen importantes aplicaciones, entre ellas: pigmentos, materiales refractarios, catalíticos y cerámicas electrónicas.En este contexto, el objetivo de este trabajo fue la preparación de polvo de la fase espinela Li2CoTi3O8 con tamaño de partícula nanométrica por el método de los precursores poliméricos (Pechini) y caracterización por medio de las técnicas de análisis térmico (TG/DTA), difracción de rayosX (DRX), refinamiento por el método de Rietveld, BET, microscopia electrónica de transmisión (TEM), Raman y coordenadas colorimétricas. El pigmento fue obtenido por tratamientos térmicos de 400 a 1.000°C después de su pirólisis a 300°C/1h para la eliminación del material orgánico. La fase espinela Li2CoTi3O8 deseada fue obtenida a partir de 500°C, nanométrica y presentando estabilidad hasta aproximadamente 1.300°C. La fase espinela presentó el color verde a temperaturas en el rango de 400-500°C y azul a temperaturas entre 600 y 1.000°C. Por lo tanto, los resultados demuestran la viabilidad de utilización de esta fase espinela Li2CoTi3O8 como pigmento, ya que presentó coloración a baja temperatura y con partícula nanométrica.AbstractPigments are used in ceramics, cosmetics, inks, and other applications widely materials. To this must be single and easily reproducible. Moreover, the pigments obtained in the nanoscale are more stable, reproducible and highlight color in small amounts compared with those obtained in micrometer scale. The mixed oxides with spinel structures AB2O4 have important applications, including: pigments, refractories, catalytic and electronic ceramics.In this context, the aim of this work was the preparation of powder Li2CoTi3O8 spinel phase with nanometer particle size of the polymeric precursor method (Pechini) and characterization by means of thermal analysis (TG/DTA) X-ray diffraction (XRD), refined by the Rietveld method, BET, transmission electron microscopy (TEM), Raman and colorimetric coordinates. The pigment was obtained by heat treatment of 400°C to 1000°C after pyrolysis at 300°C/1h for removing the organic material. Li2CoTi3O8 desired spinel phase was obtained from 500°C, and presenting stability nanometer to about 1.300°C. Spinel green phase introduced at temperatures in the range of 400°C and 500°C, and 600°C at temperatures between blue and 1000°C.

Country
Brazil
Keywords

Nanométrico, Spinel, Clay industries. Ceramics. Glass, Inorganic pigment, Nanometer, Industrial and Manufacturing Engineering, 620, TP785-869, Espinela, Mechanics of Materials, Pigmento inorgánico, Método Pechini, Ceramics and Composites, Pechini method, Li2CoTi3O8

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
1
Average
Average
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