Preparation of monolithic aluminium titanate with well-defined macropores via a sol–gel process accompanied by phase separation

Guo, Xingzhong; Zhu, Wenjun; Yu, Peilin; Liu, Shengxing; Yang, Hui

doi:10.1016/j.matdes.2015.06.055

Cited by 14 publications

(5 citation statements)

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“…CoTi 2 O 5 has been observed to be antiferromagnetic with possible applications in magnetic sensors, and has been studied as a photocatalyst, but other properties are largely unexplored. However, the isostructural phases Al 2 TiO 5 and MgTi 2 O 5 are known for their low thermal conductivity and low thermal expansion, and have applications where thermal insulation and thermal shock resistance are required such as in combustion engines and catalyst carriers . A primary drawback for these materials is their strong anisotropy of thermal expansion, which leads to poor strength due to extensive microcracking .…”

Section: Introductionmentioning

confidence: 99%

“…However, the isostructural phases Al 2 TiO 5 and MgTi 2 O 5 are known for their low thermal conductivity and low thermal expansion, [25][26][27][28][29] and have applications where thermal insulation and thermal shock resistance are required such as in combustion engines [30][31][32][33] and catalyst carriers. [34][35][36] A primary drawback for these materials is their strong anisotropy of thermal expansion, which leads to poor strength due to extensive microcracking. [37][38][39][40] Promoting texturing via single crystal growth may represent a means of improving these materials.…”

Section: Introductionmentioning

confidence: 99%

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Single crystal growth of CoTi₂O₅ by solid state reaction synthesis

et al. 2019

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Materials in single crystal form are often sought after because the absence of grain boundaries can result in unique properties relative to the polycrystal, but producing these materials is typically a slow and complex process. In this work, pseudo single crystals of the pseudobrookite compound CoTi2O5 were synthesized by solid‐state reaction from a duplex grain mixture of CoTiO3 and TiO2. The size of the crystallites was >250 µm. The transformation and subsequent microstructural evolution of the CoTi2O5 was studied by scanning electron microscopy (SEM), electron backscatter diffraction (EBSD), transmission electron microscopy (TEM), scanning transmission electron microscopy (STEM), and X‐ray diffraction (XRD). A novel growth mechanism was identified whereby a single crystal CoTi2O5 front advances simultaneously along multiple CoTiO3/TiO2 diphasic boundaries. The single crystal domains were composed of subgrains approximately 5 µm in diameter; differences in the subgrain size and misorientation were related to the growth mechanism and the initial grain size of the duplex CoTiO3–TiO2 mixture. CoTi2O5 is a little characterized compound, and this study represents the most significant microstructural study of CoTi2O5 to date. The findings may be applied to similar pseudobrookite compounds such as MgTi2O5 and Al2TiO5.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Single crystal growth of CoTi₂O₅ by solid state reaction synthesis

et al. 2019

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“…These ellipsoid-like particles are formed due to the effect of phase-separation induced by PEO, which have been reported in our previous work. 40,[45][46][47] The high-magnication SEM images (Fig. 3b and d) indicate that both of pure Li 4 Ti 5 O 12 and Li 4 Ti 5 O 12 -TiO 2 composite display a coarse surface with an assembly of many ne nanocrystals due to the successive release and loss of CO 2 and H 2 O during the thermal decomposition, which may be benecial for high-rate capability and cycle stability by shortening the path of electron transport and lithium diffusion.…”

Section: Resultsmentioning

confidence: 99%

Ellipsoid-like Li₄Ti₅O₁₂–TiO₂ composites constructed by nanocrystals for lithium ion batteries

Zhu

Guo

2016

RSC Adv.

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“…Nano Al 2 TiO 5 was prepared at a low temperature via the sol-gel technique using titanium tetrabutoxide (Ti(OC 4 H 9 ) 4 ), aluminum chloride (AlCl 3 ), and citric acid monohydrate as a chelating agent [7]. A previous study [14] adopted the sol-gel technique with phase secession to prepare monolithic Al 2 TiO 5 .…”

Section: Introductionmentioning

confidence: 99%

Formation, Phase Stability, and Characterization of Unstabilized Aluminum Titanate (Al2TiO5) Ceramics

Hassan

Naga

Awaad

et al. 2021

Preprint

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In the present study, Al2TiO5 was prepared via the sol–gel technique then sintered at 1000°C to 1300°C for 1 h. The thermal stability of the formed ceramic bodies was explored. The densification parameters, microstructure, and phase composition of the sintered Al2TiO5 ceramic were examined, and the mechanical properties and thermal coefficient were characterized. The phase composition study revealed the presence of alumina and TiO2 residuals up to 1100°C. Phase stability was observed in Al2TiO5 bodies sintered up to 1300°C. The vitrification behavior of the bodies was improved by increasing the sintering temperature. The thermal expansion coefficient of the sintered samples sintered at 1300°C was enhanced by the formation of rod-like Al2TiO5 grains. Increases in the bending strength (from 22.40 to 28.90 MPa) and hardness (HV0.1; from 1467 to 1873) were observed when the treatment temperature was increased from 1000°C to 1300°C.

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Preparation of monolithic aluminium titanate with well-defined macropores via a sol–gel process accompanied by phase separation

Cited by 14 publications

References 45 publications

Single crystal growth of CoTi₂O₅ by solid state reaction synthesis

Single crystal growth of CoTi₂O₅ by solid state reaction synthesis

Ellipsoid-like Li₄Ti₅O₁₂–TiO₂ composites constructed by nanocrystals for lithium ion batteries

Formation, Phase Stability, and Characterization of Unstabilized Aluminum Titanate (Al2TiO5) Ceramics

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Preparation of monolithic aluminium titanate with well-defined macropores via a sol–gel process accompanied by phase separation

Cited by 14 publications

References 45 publications

Single crystal growth of CoTi2O5 by solid state reaction synthesis

Single crystal growth of CoTi2O5 by solid state reaction synthesis

Ellipsoid-like Li4Ti5O12–TiO2 composites constructed by nanocrystals for lithium ion batteries

Formation, Phase Stability, and Characterization of Unstabilized Aluminum Titanate (Al2TiO5) Ceramics

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Product

Resources

About

Single crystal growth of CoTi₂O₅ by solid state reaction synthesis

Single crystal growth of CoTi₂O₅ by solid state reaction synthesis

Ellipsoid-like Li₄Ti₅O₁₂–TiO₂ composites constructed by nanocrystals for lithium ion batteries