The influence of temperature on the color of TiO2:Cr pigments

Vieira, F. T. G.; Melo, Djair Alves de; Lima, Severino Jackson Guedes de; Longo, Elson; Paskocimas, C. A.; Júnior, Wilson Silva; Souza, A. G.; Santos, I. M. G.

doi:10.1016/j.materresbull.2008.10.007

Cited by 27 publications

(5 citation statements)

References 36 publications

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“…Some simple reactivity models are proposed, without taking into account the formation of the QISS. While this section is limited to the rutile structure, it is essential to note that the anatase phase has the tendency to convert into rutile, as has been verified experimentally. − …”

Section: Reactivity Of Tio2-h2o: Charge Transfer Modelsmentioning

confidence: 93%

Electron Probe Bridging Solid-State Chemistry and Surface Chemistry: Example of the TiO₂-O₂ System

Бак

Gür

Nowotny

2023

ACS Appl. Energy Mater.

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This work reports the capacity of a high-temperature electron probe to bridge solid-state chemistry and surface chemistry. This goal could be accomplished by performing the characterization of the surface layer in equilibrium with both the gas phase and bulk phase, thus dealing with a system governed by thermodynamic laws, which is free of unknown kinetic terms. In this work, we contemplate the use of the electron probe in surface defect engineering of the next generation of energy materials, that are expected to enhance the production of clean energy. The concept of this kind of engineering is considered for the TiO 2 -O 2 model system. Such example demonstrates the role of surface segregation in the formation of a quasi-isolated surface structure, that has a profound impact on the reactivity of solids and their performance in energy conversion devices. Consequently, it is essential that studies of the effect of surface defect structure on the reactivity of solids are conducted in situ and in operando, under conditions of real application. This is expected to aid directly the rational design of surface properties in the processing of high-performance energy materials for fuel cells, solar cells, batteries, catalysts and photo-catalysts, as well as sensors.

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Section: Reactivity Of Tio2-h2o: Charge Transfer Modelsmentioning

confidence: 93%

Electron Probe Bridging Solid-State Chemistry and Surface Chemistry: Example of the TiO₂-O₂ System

Бак

Gür

Nowotny

2023

ACS Appl. Energy Mater.

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“…They believe that Ti 3+ and Ti 2+ from the Ti-6Al-4V substrate are responsible for the black color of TiO 2 . Nevertheless, it is known that TiO 2 is mainly used as a white pigment [58][59][60].…”

Section: Discussionmentioning

confidence: 99%

Black PEO Coatings on Titanium and Titanium Alloys Produced at Low Current Densities

Kostelac,

Pezzato,

Colusso

et al. 2023

Applied Sciences

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Black coatings were successfully formed on Grade 2 (G2) and Grade 5 (G5) titanium alloy by means of a direct-current Plasma Electrolytic Oxidation (PEO) process at a very low current density of 0.05 A/cm2. The impact of two different treatment times (30 min and 60 min) was examined. The electrolyte for the PEO process was a phosphate base solution Na5P3O10 containing FeSO4 and (NH4)6Mo7O24 as coloring additives. PEO-coated samples were subjected to optical, morphological, structural, chemical, and electrochemical characterization. XRD, EDS, and XPS data analyses revealed that anion MoO42− and metal cation Fe3+ were successfully incorporated into the coatings. The results demonstrated that PEO-coated samples prepared after 60 min exhibit a stronger black color than those created after 30 min, with an absorptance maximum of 0.86. Furthermore, all prepared PEO coatings improve the corrosion resistance of bare titanium. Among them, the 60-minute PEO coatings on both alloys were the ones with the best corrosion properties.

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“…From the view of the relationship between the phase composition and chroma ( phase transformation, as rutile leads to a more symmetrical coordination around the chromophore, decreasing the Jahn-Teller effect [16].…”

Section: Mechanismmentioning

confidence: 99%

Effects of low-melting temperature salt (Na2SO4) addition on the phase transformation, crystal growth, and chroma of titanium dioxide pigments

et al. 2015

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The influence of temperature on the color of TiO2:Cr pigments

Cited by 27 publications

References 36 publications

Electron Probe Bridging Solid-State Chemistry and Surface Chemistry: Example of the TiO₂-O₂ System

Electron Probe Bridging Solid-State Chemistry and Surface Chemistry: Example of the TiO₂-O₂ System

Black PEO Coatings on Titanium and Titanium Alloys Produced at Low Current Densities

Effects of low-melting temperature salt (Na2SO4) addition on the phase transformation, crystal growth, and chroma of titanium dioxide pigments

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The influence of temperature on the color of TiO2:Cr pigments

Cited by 27 publications

References 36 publications

Electron Probe Bridging Solid-State Chemistry and Surface Chemistry: Example of the TiO2-O2 System

Electron Probe Bridging Solid-State Chemistry and Surface Chemistry: Example of the TiO2-O2 System

Black PEO Coatings on Titanium and Titanium Alloys Produced at Low Current Densities

Effects of low-melting temperature salt (Na2SO4) addition on the phase transformation, crystal growth, and chroma of titanium dioxide pigments

Contact Info

Product

Resources

About

Electron Probe Bridging Solid-State Chemistry and Surface Chemistry: Example of the TiO₂-O₂ System

Electron Probe Bridging Solid-State Chemistry and Surface Chemistry: Example of the TiO₂-O₂ System