Preparation and properties of the Al2O3–SiO2 aerogel/alumina framework composite

Jia, Huijiao; Liu, Shan; Mao, Zhiyong; Wang, Dajian

doi:10.1016/j.ceramint.2020.08.206

Cited by 23 publications

(5 citation statements)

References 31 publications

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“…All kinds of aluminum oxide powders are comprised of loose near-spherical particles (Figure 1 and Figure 2)  and an average diameter is 9.37468 m  . The determination of the sintering temperature is related to the compositions, particle size, surface state, and the property required for the product [13][14][15] . The ideal sintering temperature is 0.5 T m , and a long period is needed.…”

Section: Methodsmentioning

confidence: 99%

“…The ɑ-Al 2 O 3 powder exhibits a particle size of D 50 = 3.5048 m  and an average diameter is 3.96351 m  , while the γ-Al 2 O 3 powder possesses a particle size of D 50 = 8.58033 m  and an average diameter is 9.37468 m  . The determination of the sintering temperature is related to the compositions, particle size, surface state, and the property required for the product[13][14][15] . The ideal sintering temperature is 0.5 T m , and a long period is needed.…”

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confidence: 99%

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Study on sintering properties of aluminum oxide nano-powder for electronics packaging

Lin,

Huang,

Ran

et al. 2024

J. Phys.: Conf. Ser.

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The microstructures of two kinds of nano powders (ɑ-Al2O3, γ-Al2O3) are studied using a scanning electron microscope (SEM), X-ray diffraction (XRD) under the customized low-temperature sintering process (under the maximum sintering temperature 1600 °C) for the frame material of the customized ceramic for high power electronics packaging application. The experimental results show that the structure of ɑ-Al2O3 is stable while the structure of γ-Al2O3 is unstable. The crystalline form of γ-Al2O3 is changed to ɑ-Al2O3 under the sintering process. The two kinds of powders are all bonded together with a laminate structure. The sintered samples of the γ-Al2O3 are the most compacted.

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Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

Study on sintering properties of aluminum oxide nano-powder for electronics packaging

Lin,

Huang,

Ran

et al. 2024

J. Phys.: Conf. Ser.

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“…Due to these structural characteristics, it is commonly used as catalyst directly or the matrix to load catalyst [40][41][42], which showing a great catalytic performance. At present, there are many methods to prepare TiO2 aerogels, including sol-gel method [43][44][45][46][47], hydrothermal method [48,49], dry method [50,51], microemulsion method [52,53], precipitation method [54][55][56][57], and so on. Among these common strategies, the sol-gel method has received the most widely studied.…”

Section: Introductionmentioning

confidence: 99%

Theoretical Study of the Impact of Pore Size in TiO₂ Aerogels on Photocatalytic Formaldehyde Decomposition

Xiang,

Sun,

2024

Preprint

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Formaldehyde (HCHO), an indoor volatile organic compound, is seriously harmful to human health. Therefore, green and effective decomposition of HCHO is essential. TiO2 has been employed for the degradation of HCHO via photocatalytic generation of reactive oxygen species (ROS) (O2-, ·OH), yet the low specific surface area of crystalline TiO2 depressed the catalytic performance. Herein, we prepared TiO2 aerogels with high specific surface area and high porosity by sol-gel method, and added PVA to introduce flexible molecular chains for pore size regulation. The photocatalytic performance test verifies that the pore size of TiO2 aerogel is one of the important factors for HCHO decomposition. Notably, through the establishment of theoretical model and calculation, we validated that the efficiency of HCHO decomposition is related to the oxygen pressure in the pores of TiO2 aerogel, and the oxygen pressure is inversely proportional to the pore size. Accordingly, the optimal pore size of TiO2 aerogel for the photocatalytic HCHO decomposition is 2 nm~10 nm. This study provides a theoretical idea for TiO2 aerogels in the decomposition reaction of HCHO, which is expected to inspire more breakthroughs in the study of TiO2 aerogels for green chemistry.

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Section: Introductionmentioning

confidence: 99%

Theoretical Study of the Impact of Pore Size in TiO₂ Aerogels on Photocatalytic Formaldehyde Decomposition

Sun,

Yu,

Xiang

2024

Preprint

View full text Add to dashboard Cite

Formaldehyde (HCHO), an indoor volatile organic compound, is seriously harmful to human health. Therefore, green and effective decomposition of HCHO is essential. TiO2 has been employed for the degradation of HCHO via photocatalytic generation of reactive oxygen species (ROS) (O2-, ·OH), yet the low specific surface area of crystalline TiO2 depressed the catalytic performance. Herein, we prepared TiO2 aerogels with high specific surface area and high porosity by sol-gel method, and added PVA to introduce flexible molecular chains for pore size regulation. The photocatalytic performance test verifies that the pore size of TiO2 aerogel is one of the important factors for HCHO decomposition. Notably, through the establishment of theoretical model and calculation, we validated that the efficiency of HCHO decomposition is related to the oxygen pressure in the pores of TiO2 aerogel, and the oxygen pressure is inversely proportional to the pore size. Accordingly, the optimal pore size of TiO2 aerogel for the photocatalytic HCHO decomposition is 2 nm-10 nm. This study provides a theoretical idea for TiO2 aerogels in the decomposition reaction of HCHO, which is expected to inspire more breakthroughs in the study of TiO2 aerogels for green chemistry.

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Preparation and properties of the Al2O3–SiO2 aerogel/alumina framework composite

Cited by 23 publications

References 31 publications

Study on sintering properties of aluminum oxide nano-powder for electronics packaging

Study on sintering properties of aluminum oxide nano-powder for electronics packaging

Theoretical Study of the Impact of Pore Size in TiO₂ Aerogels on Photocatalytic Formaldehyde Decomposition

Theoretical Study of the Impact of Pore Size in TiO₂ Aerogels on Photocatalytic Formaldehyde Decomposition

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