Surface modification of coked alumina refractories by the deposition of sol-gel derived silica coatings

Campos, Karina S.; Silva, Guilherme Frederico Bernardo Lenz e; Nunes, Eduardo H.M.; Silva, Alysson M.A.; Bestard, Guillermo Alvarez; Vasconcelos, Wander L.

doi:10.1016/j.ceramint.2019.01.182

Cited by 2 publications

(4 citation statements)

References 31 publications

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“…The bands observed around 1339 [29][30][31], 1437 [29][30][31], 1619 [29][30][31] and 2900 cm −1 [29][30][31][32], respectively, are related to (C-C), (C-O), (C = C) and (C-H) as well as aromatic rings, which all correspond to phenolic resin bonds. The broad band at 3369 cm −1 [29][30][31][32][33][34] is related to OH and (Si-OH) groups. The bands observed at 821 [33] and 1437 cm −1 [33], respectively, are related to (Zr-O-Zr) and (B-O-C) bonds.…”

Section: Resultsmentioning

confidence: 99%

“…There exists an obvious absorption peak at 841 cm −1 [22,30,35], which was assigned to both (Zr-C) and (Si-C) bonds. The absorption bands at 1084 cm −1 [22] and 1643 cm −1 [34] are attributed to (Zr-B) and (Zr-C) bonds, respectively. The band at 1381 cm −1 [22,34] is related to both (Zr-B) and (Zr-C) bonds.…”

Section: Resultsmentioning

confidence: 99%

“…The absorption bands at 1084 cm −1 [22] and 1643 cm −1 [34] are attributed to (Zr-B) and (Zr-C) bonds, respectively. The band at 1381 cm −1 [22,34] is related to both (Zr-B) and (Zr-C) bonds.…”

Section: Resultsmentioning

confidence: 99%

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In situ synthesis of ZrB₂–ZrC–SiC ultra-high-temperature nanocomposites by a sol–gel process

Moayyeri

Aghdam

Ghelich

et al. 2018

Advances in Applied Ceramics

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ZrB 2 -ZrC-SiC is one of the ultra-high-temperature ceramic composites with excellent properties. In this research, high-purity ZrB 2 -ZrC-SiC nanopowders were synthesised using a carbothermal reduction reaction at a relatively low temperature (1370°C) from cost-effective zirconium(IV) chloride by a sol-gel method. The effect of heat treatment temperature on the synthesis of ZrB 2 -ZrC-SiC composite powder was studied. X-ray diffractometry results showed that the phases ZrB 2 , β-SiC and ZrC were synthesised at 1370°C. The mean crystallite sizes for each of the phases were calculated using the Scherrer method. The specific surface area for the sample calcined at 1370°C was 81.479 m 2 g −1 . SEM observation revealed that the particles had a size lower than 250 nm. Backscattered electron image and map analysis with scanning electron microscopy showed that a suitable phase homogeneity was achieved, as confirmed by energy-dispersive X-ray spectroscopy.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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In situ synthesis of ZrB₂–ZrC–SiC ultra-high-temperature nanocomposites by a sol–gel process

Moayyeri

Aghdam

Ghelich

et al. 2018

Advances in Applied Ceramics

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“…The treatment decreases the hygroscopicity of the wood sample, and can also improve the dimensional stability due to the incorporation of the combination of aluminum sulfate and boric acid agents. The application of inorganic sol-gel for wood modification treatment to both enhance and improve resistance to fungi has attracted the attention of many researchers [13,14].…”

Section: Introductionmentioning

confidence: 99%

Influence of Mesoporous Inorganic Al–B–P Amphiprotic Surfactant Material Resistances of Wood against Brown and White-Rot Fungi (Part 1)

Beaudelaire¹,

Zhuang²,

Aladejana³

et al. 2020

Coatings

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This study describes the application of aluminum sulfate Al2(SO4)3, boric acid H3BO3, phosphoric acid H3PO4 (Al–B–P) and amphiprotic surfactant material synthesis by the sol-gel process, which were adopted as novel precursors for wood modification. The efficacy of Al–B–P-treated wood was tested against Poria placenta and Coriolus versicolor. Untreated wood samples had higher mass losses (>40%) compared to the treated sample, which had the lowest wood mass losses (of 4%) against P. placenta and C. versicolor. To analyze the reaction mechanism of Al–B–P wood, the mechanical properties, chemical structure, crystallinity, thermal analysis, binding energy and wettability was examined by modulus of rupture (MOR), modulus of elasticity (MOE), Fourier transform infrared spectroscopy (FTIR), X-ray powder diffraction (XRD), Thermogravimetric analysis (TG) and X-ray photoelectron spectroscopy (XPS), respectively. Scanning electron microscopy- energy-dispersive X-ray spectroscopy (SEM-EDS) confirmed the wood colonization by fungi, and was used to identify the microstructures and morphologies changes that occurred in the cells during degradation by white and brown-rot fungi. At the same time, X-ray photoelectron spectroscopy (XPS) was employed to analyze the physical and chemical properties of the samples. Therefore, the study confirmed that Al–B–P and amphiprotic surfactant could replace the traditional wood preservative products, and have the potential to extend the service life of wood, particularly in soil contact and outdoor usage.

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Surface modification of coked alumina refractories by the deposition of sol-gel derived silica coatings

Cited by 2 publications

References 31 publications

In situ synthesis of ZrB₂–ZrC–SiC ultra-high-temperature nanocomposites by a sol–gel process

In situ synthesis of ZrB₂–ZrC–SiC ultra-high-temperature nanocomposites by a sol–gel process

Influence of Mesoporous Inorganic Al–B–P Amphiprotic Surfactant Material Resistances of Wood against Brown and White-Rot Fungi (Part 1)

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Surface modification of coked alumina refractories by the deposition of sol-gel derived silica coatings

Cited by 2 publications

References 31 publications

In situ synthesis of ZrB2–ZrC–SiC ultra-high-temperature nanocomposites by a sol–gel process

In situ synthesis of ZrB2–ZrC–SiC ultra-high-temperature nanocomposites by a sol–gel process

Influence of Mesoporous Inorganic Al–B–P Amphiprotic Surfactant Material Resistances of Wood against Brown and White-Rot Fungi (Part 1)

Contact Info

Product

Resources

About

In situ synthesis of ZrB₂–ZrC–SiC ultra-high-temperature nanocomposites by a sol–gel process

In situ synthesis of ZrB₂–ZrC–SiC ultra-high-temperature nanocomposites by a sol–gel process