Preparation of aluminum titanate flexible ceramic by solid-phase sintering and its mechanical behavior

Dong, Guoping; Shui, Anze; Li, Jianqiao; Ma, Juan; Wei, Tian; Ota, Toshitaka; Xi, Xiuan

doi:10.1016/j.jallcom.2018.09.317

Cited by 30 publications

(22 citation statements)

References 21 publications

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“…The strain ( ε ) at maximum bending stress was used as an indicator of the flexibility of AT ceramics in this study, and it was calculated using Equation (). [ 17,18 ] The data were from the fracture strength measurement ( M : the displacement (mm) corresponding to maximum bending stress, I : geometrical moment of inertia = (WT 3 )/12, S : span (mm), Z : modulus of section = (WT 2 )/6, W : width (mm), and T : thickness (mm)).

ε (%) = (12 M I / S^{2} Z) \times 100

…”

Section: Methodsmentioning

confidence: 99%

“…[ 16 ] Shimazu et al [ 17 ] reported that Al 2 TiO 5 –MgTi 2 O 5 flexible composite ceramics prepared at 1500 °C for 2 h exhibited nonlinear behavior, which could be attributed to the formation of microcracks formed along the grain boundaries. Babelot et al [ 14 ] and Chen et al [ 18 ] reported AT flexible ceramics prepared by AT powders. It was found that increasing sintering temperature and extending soaking time are beneficial to improve the flexibility of AT ceramics due to the formation of more and wider grain boundary microcracks.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Cooling Rates on the Microstructure and Mechanical Properties of Aluminum Titanate Flexible Ceramic

et al. 2021

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Herein, aluminum titanate (Al2TiO5, AT) flexible ceramics with different cooling rates (program‐controlling cooling (10 and 20 °C min−1), air cooling (≈400 °C min−1), and water cooling (>1000 °C min−1) are fabricated by reaction sintering of Al2O3 and TiO2. The effect of cooling rates on microstructures and the mechanical properties of AT ceramics are systematically investigated. The microcrack width and density of AT ceramics with different cooling rates are statistically calculated. In addition, the effect of a microcracks structure on the mechanical properties of AT ceramics is deeply studied. Results show that the increase in cooling rate will increase the width and density of microcrack, leading to a suitable increase in flexibility and a slight decrease in strength. When AT is cooled in air, the best bending strain of 1.10% can be obtained, with a median microcrack width of 0.533 μm and a density of 6831.88 ± 374.87 N mm−2. It is hopeful that through this research, the effect of cooling rate on the mechanical properties of AT flexible ceramics can be deeply understood, and the strategy used in this research can be used in other exploration of similar material.

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ε (%) = (12 M I / S^{2} Z) \times 100

…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of Cooling Rates on the Microstructure and Mechanical Properties of Aluminum Titanate Flexible Ceramic

et al. 2021

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“…It is obvious that the sintering behavior of the cases with silicon carbide addition in terms of temperature change shows a discrepancy with previous AT ceramics researches. 40,41 This could be attributed to the synergy effect of grain growth, systematic liquid phases, and microstructural modulation of SiC, which will be discussed in the following part.…”

Section: Sintering Properties Of Sintered At Ceramicsmentioning

confidence: 99%

Sintering and characterization of aluminum titanate ceramics with enhanced thermomechanical properties

Huang

Song

Chen

et al. 2022

Int J Applied Ceramic Tech

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Aluminum titanate (Al2TiO5) was synthesized from Al2O3‐TiO2 system by solid‐phase reaction with additives of light magnesium carbonate and SiO2, incorporating with silicon carbide (SiC) particle. The influence of additives on the phase composition, microstructure configuration, sintering, and thermomechanical properties of the developed materials was investigated. The experimental results illustrated that the utilization of additives with applicable contents was conducive to the development of complex microstructures. The microstructures characterized by microcracks matrix together with interlocked grains were identified. The samples incorporating SiC and SiO2 simultaneously displayed exceptional densification properties and microstructure as a result of a SiO2 liquid phase accelerating SiC oxidation. Meanwhile, high flexural strength (41.51 MPa) and low thermal expansion coefficient of 0.485 × 10−6 K−1 (RT‐1000 °C) were detected, encouraging refractory applications with high thermomechanical solicitations.

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“…The lattice space was ~0. 35 nm, corresponding to the (101) plane of anatase TiO 2 . This was in agreement with the XRD analysis.…”

Section: Surface Defect Characterization Of the Pristine And The Redumentioning

confidence: 99%

“…With electrospinning, the morphology of fibers and the thickness of textiles could be easily adjusted to achieve the desired functionalities (32,33). While a low temperature of 700° to 800°C and a short calcination time of 2 hours were applied for fabricating the metal oxide ceramic NFs, greatly reducing power energy consumption and time cost in comparison with the traditional solid-phase sintering techniques that required a high calcination temperature of >1000°C and a long pyrolysis time of >12 hours (34,35).…”

Section: Large-scale Production and Potential Applications Of Conductmentioning

confidence: 99%

Transformation of oxide ceramic textiles from insulation to conduction at room temperature

et al. 2020

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Oxide ceramics are considered to be nonconductive brittle materials, which limits their applications in emerging fields such as conductive textiles. Here, we show a facile domino-cascade reduction method that enables rapid transformation of ceramic nanofiber textiles from insulation to conduction at room temperature. After putting dimethylacetamide-wetted textiles, including TiO2, SnO2, BaTiO3, and Li0.33La0.56TiO3, on lithium plates, the self-driven chemical reactions induce defects in oxides. These defects initiate an interfacial insulation-to-conductive phase transition, which triggers the domino-cascade reduction from the interface to the whole textile. Correspondingly, the conductivity of the textile sharply increased from 0 to 40 S/m over a period of 1 min. The modified oxide textiles exhibit enhanced electrochemical performance when substituting the metallic current collectors of lithium batteries. This room temperature reduction method can protect the nanostructures while inducing defects in oxide ceramic textiles, appealing for numerous applications.

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Preparation of aluminum titanate flexible ceramic by solid-phase sintering and its mechanical behavior

Cited by 30 publications

References 21 publications

Influence of Cooling Rates on the Microstructure and Mechanical Properties of Aluminum Titanate Flexible Ceramic

Influence of Cooling Rates on the Microstructure and Mechanical Properties of Aluminum Titanate Flexible Ceramic

Sintering and characterization of aluminum titanate ceramics with enhanced thermomechanical properties

Transformation of oxide ceramic textiles from insulation to conduction at room temperature

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