Fabrication of Al2O3/AlN composite ceramics with enhanced performance via a heterogeneous precipitation coating process

Nie, Guanglin; Li, Yehua; Sheng, Pengfei; Tian, Zhiling; Liu, Wei; Wu, Haidong; Bao, Yiwang; Wu, Shanghua

doi:10.1016/j.ceramint.2020.05.193

Cited by 13 publications

(4 citation statements)

References 60 publications

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“…The Y(NO 3 ) 3 ·6H 2 O was calcined at 260°C for 30 min to remove the crystal water, thus the non‐aqueous precursor solution can be obtained by dissolving Y(NO 3 ) 3 in ethanol. The non‐aqueous precursor and precipitant solutions were utilized to avoid the hydrolysis of AlN powders, and the detailed CP processing parameters can be found in our previous work 21 . The precipitation of yttrium‐amine coordination compound was first deposited on the surface of the AlN powder, and then was decomposed into yttrium oxide by a calcination process.…”

Section: Methodsmentioning

confidence: 99%

“…The nonaqueous precursor and precipitant solutions were utilized to avoid the hydrolysis of AlN powders, and the detailed CP processing parameters can be found in our previous work. 21 The precipitation of yttrium-amine coordination compound was first deposited on the surface of the AlN powder, and then was decomposed into yttrium oxide by a calcination process. Moreover to investigate the thermal decomposition of the yttrium-amine coordination compound coating, the individual air-dried yttrium-amine coordination compound precipitation was prepared by the CP process without the addition of ceramic powder.…”

mentioning

confidence: 99%

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Enhanced mechanical and thermal properties of AlN ceramics via a chemical precipitation process

Nie

Sheng

et al. 2021

Int J Applied Ceramic Tech

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Aluminum nitride (AlN) ceramics are promising materials for the thermal management of high power electronics, photovoltaic moduli, and LEDs, because of their high thermal conductivity (the intrinsic thermal conductivity ≈319 W m −1 K −1 ), high electrical resistivity, low dielectric constant, no toxicity, and a coefficient of thermal expansion close to that of silicon. [1][2][3] Up until now, substantial research efforts have been made to enhance the thermal conductivity of AlN ceramic. [4][5][6] The high power density in power electronics applications can cause crack propagation and fatigue failure in ceramic substrates owing to high thermal stresses arising at the joints with circuits. 7,8 Therefore, besides the high thermal conductivity, the superior mechanical strength is also significant for AlN ceramics to be widely useful. Some studies recently have been focused on improving the bending strength of AlN ceramics. Kusunose et al 9 achieved the high bending strength of 433 ± 19 MPa for AlN ceramic with Y 2 O 3 -CeO 2 additives, but its thermal conductivity is just 136 W m −1 K −1 . Beyond

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Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

Enhanced mechanical and thermal properties of AlN ceramics via a chemical precipitation process

Nie

Sheng

et al. 2021

Int J Applied Ceramic Tech

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“…These catalysts have diverse chemical formations and correspond to three separate groups. Figure 6 shows the decay patterns of the three dyes by the two nanomaterials under UV-A light [44][45][46].…”

Section: Photo-degradation Of Dyesmentioning

confidence: 99%

A Review of Synthesis and Applications of Al2O3 for Organic Dye Degradation/Adsorption

Rajendran,

Palani,

Shanmugam

et al. 2023

Molecules

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This comprehensive review investigates the potential of aluminum oxide (Al2O3) as a highly effective adsorbent for organic dye degradation. Al2O3 emerges as a promising solution to address environmental challenges associated with dye discharge due to its solid ceramic composition, robust mechanical properties, expansive surface area, and exceptional resistance to environmental degradation. The paper meticulously examines recent advancements in Al2O3-based materials, emphasizing their efficacy in both organic dye degradation and adsorption. Offering a nuanced understanding of Al2O3’s pivotal role in environmental remediation, this review provides a valuable synthesis of the latest research developments in the field of dye degradation. It serves as an insightful resource, emphasizing the significant potential of aluminum oxide in mitigating the pressing environmental concerns linked to organic dye discharge. The application of Al2O3-based catalysts in the photocatalytic treatment of multi-component organic dyes necessitates further exploration, particularly in addressing real-world wastewater complexities.

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“…A peak at 530.2 eV was observed in O1s core level scan. A peak at 66.8 eV was noted in Al2p core level scan ascribed to Al2O3 presence [27]. The core level scan of Cd3d spectrum showed two components at 403.8 eV (Cd3d5/2) and 410.6 eV (Cd3d3/2) [28].…”

Section: X-ray Photoelectron Spectroscopymentioning

confidence: 99%

Mesoporous CdO/Al2O3 nanocomposite with enhanced optoelectronic properties for visible-light photocatalysis and bactericidal applications

Janani¹,

Syed²,

Elgorban³

et al. 2021

Preprint

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Pristine Al2O3 and CdO are known to possess poor photocatalytic activity individually. The formation of CdO/Al2O3 heterojunction was investigated for the enhancement of photocatalytic performance. High resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) has been used to determine the crystalline feature and elemental composition of the NCs respectively. Peaks ascribed to Cd-O and O-Al-O was noted in fourier-transform infrared spectroscopy (FTIR) analysis. The NCs exhibits a high surface area (27.23 m2/g) to their contributing particles which was analysed using BET analyser. The band gap energy of CdO/Al2O3NCs was observed to be 2.95 eV which shows a considerable energy shift from its individual particles, CdO (2.73 eV) and Al2O3 (3.94 eV). The results displayed that the degradation efficiency of the CdO-Al2O3 NCs was enhanced 14 times than pristine Al2O3 and 3.5 times than pristine CdO. The MB dye has showed the half life period of 80 min. TOC analysis of degraded product supported high mineralization of the pollutants. The dye degradation was driven by OH. radicals and the CdO-Al2O3 nanocomposite possessed high reusability which was confirmed by six cycle test. Growth inhibition of E. coli, P. aeruginosa and B. subtilis was attained by exposure to CdO/Al2O3 NCs. The CdO-Al2O3 NCs can be a viable solution for degradation of organic contaminants effectively under natural sun light as well as an efficient antibacterial agent.

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Fabrication of Al2O3/AlN composite ceramics with enhanced performance via a heterogeneous precipitation coating process

Cited by 13 publications

References 60 publications

Enhanced mechanical and thermal properties of AlN ceramics via a chemical precipitation process

Enhanced mechanical and thermal properties of AlN ceramics via a chemical precipitation process

A Review of Synthesis and Applications of Al2O3 for Organic Dye Degradation/Adsorption

Mesoporous CdO/Al2O3 nanocomposite with enhanced optoelectronic properties for visible-light photocatalysis and bactericidal applications

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