Thermo-analysis of nanocrystalline TiO2 ceramics during the whole sintering process using differential scanning calorimetry

Li, Da; Chen, Shaou; Wang, Dechang; Li, Yanhui; Shao, Weiquan; Long, Yun‐Ze; Liu, Zongwen; Ringer, Simon P.

doi:10.1016/j.ceramint.2009.10.004

Cited by 11 publications

(5 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In our case, it is not possible to see the transformation of the amorphous to the anatase phase in the DSC curves. Xi et al and Li et al saw this event happening at temperatures above 400°C [53,54]. Therefore, the effect is likely to be superimposed by the exothermic degradation peak of PS.…”

Section: Calcination Processmentioning

confidence: 96%

Scalable synthesis of smooth PS@TiO2 core-shell and TiO2 hollow spheres in the (sub) micron size range: understanding synthesis and calcination parameters

et al. 2020

View full text Add to dashboard Cite

Hollow spheres made from titanium dioxide (TiO 2) are interesting structures because of their high surface area and low density, combined with semiconducting properties of the TiO 2. However, the synthesis is still challenging because of the high reactivity of the titania precursors. Here, we present a simple, reproducible, and scalable way to synthesize TiO 2 hollow spheres in the micrometer/sub-micrometer size range comprising three steps: synthesis of polystyrene template particles, growth of TiO 2 shells, and calcination to hollow spheres. We investigate the importance of adjusting the seed particle surface functionalization via the appropriate choice of comonomer during the dispersion polymerization. An aging step and a calcination process at low temperatures are mandatory to retain the particle integrity during the seed particle removal. We provide a detailed characterization of each step of this process including electron microscopy, small angle X-ray scattering, and simultaneous thermal analysis.

show abstract

Section: Calcination Processmentioning

confidence: 96%

Scalable synthesis of smooth PS@TiO2 core-shell and TiO2 hollow spheres in the (sub) micron size range: understanding synthesis and calcination parameters

et al. 2020

View full text Add to dashboard Cite

show abstract

“…So the relative density and grain size of TiO 2 were usually investigated as a function of sintering time and heating rate. At higher heating rates amorphous TiO 2 transformed to rutile directly while at a lower heating rates the amorphous transformed to anastase at 500 °C and then to rutile at 800-900 °C (Li et al, 2010). The density does not change at temperatures between 650-800 °C.…”

Section: Introductionmentioning

confidence: 91%

Características mecánicas y tribológicas de compuestos de dióxido de Titanio-Aluminio

Gezici

Gül

Çavdar³

2018

REVMETAL

View full text Add to dashboard Cite

El objetivo de este trabajo es investigar las propiedades mecánicas y tribológicas de refuerzos de dióxido de titanio (TiO2) en una matriz de aluminio (Al). Se utilizó aluminio de pureza 99,8% reforzado con TiO2 ensayándose cinco cantidades diferentes de dióxido de titanio. Se mezcló polvo de aluminio y TiO2 en un molino de bolas durante 30 min, utilizando un mezclador con eje descentrado. La mezcla se compactó mediante la técnica de prensado en frío a una presión de 250 MPa. Se utilizaron dos métodos diferentes para el sinterizado. El compactado en verde se sinterizó a 600 ºC durante 300 s en atmósfera ambiental con un sistema de inducción de ultra alta frecuencia (UHFIS) y con un horno convencional a 600 °C durante 1800 s. Las propiedades mecánicas y micro-estructurales de las muestras se compararon utilizando diferentes cantidades de refuerzo. La dureza máxima se observó para un refuerzo con 5% en peso de TiO2.

show abstract

“…All the spent catalysts exhibited %weight loss in the range of 0.8% to 5%, and a temperature range of 100 °C to 500 °C. This weight loss could probably be due to the thermal decomposition or volatilization of chemical substance presented in the TiO2 catalysts [53,54]. However, the weight loss that occurred at a higher temperature can be attributed the condensation reaction between two adjacent Ti-OH groups, which resulted in the formation of Ti-O-Ti bonds and loss of water molecules [55].…”

Section: Recyclability and Properties Of Spent Catalystsmentioning

confidence: 99%

Photocatalytic Liquid-Phase Selective Hydrogenation of 3-Nitrostyrene to 3-vinylaniline of Various Treated-TiO2 Without Use of Reducing Gas

et al. 2019

View full text Add to dashboard Cite

In this work, we investigate the effect of TiO2 properties on the photocatalytic selective hydrogenation of 3-nitrostyrene (3-NS) to 3-vinylaniline (3-VA). The P25-TiO2 photocatalysts were calcined at 600–900 °C using different gases (Air, N2, and H2) and characterized by XRD, N2 physisorption, XPS, UV-Vis, and PL spectroscopy. In the photocatalytic hydrogenation of 3-nitrostyrene in isopropanol, the selectivity of 3-vinylaniline of the treated TiO2 was almost 100%. A linear correlation between the 3-NS consumption rate and PL intensity was observed. Among the catalysts studied, P25-700-air, which possessed the lowest PL intensity, exhibited the highest photocatalytic activity due to the synergistic effect that resulted from its high crystallinity and the optimum amount of anatase/rutile phase content, leading to the reduction of the electron-hole recombination process.

show abstract

Thermo-analysis of nanocrystalline TiO2 ceramics during the whole sintering process using differential scanning calorimetry

Cited by 11 publications

References 17 publications

Scalable synthesis of smooth PS@TiO2 core-shell and TiO2 hollow spheres in the (sub) micron size range: understanding synthesis and calcination parameters

Scalable synthesis of smooth PS@TiO2 core-shell and TiO2 hollow spheres in the (sub) micron size range: understanding synthesis and calcination parameters

Características mecánicas y tribológicas de compuestos de dióxido de Titanio-Aluminio

Photocatalytic Liquid-Phase Selective Hydrogenation of 3-Nitrostyrene to 3-vinylaniline of Various Treated-TiO2 Without Use of Reducing Gas

Contact Info

Product

Resources

About