Phase separation induced macroporous SiOC ceramics derived from polysiloxane

Yan, Xiao; Su, Dong; Han, Shuaishuai

doi:10.1016/j.jeurceramsoc.2014.09.028

Cited by 31 publications

(10 citation statements)

References 31 publications

(33 reference statements)

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“…Additionally, the absorption peaks of C=C-H (3058 cm −1 ) and C=C (1600 cm −1 ) almost disappeared after 24 h, suggesting that the hydrosilylation was promoted in the modification process. 35 Si-CH 3 bond is generally considered not decomposing or participating in any reaction below 600℃, 25 behavior and the ceramic properties of these clays particularly in the Sejnène region, northwest Tunisia. According to the chemical composition, these clayey materials are characterized by high iron contents whose the effect on the color of the ceramic materials is well known, and the attendance of fluxing agents as alkali and alkaline earth elements which are necessary for low temperatures firing.…”

Section: Characterizationmentioning

confidence: 99%

Polymer‐derived Fe_xSi_y/SiC@SiOC ceramic nanocomposites with tunable microwave absorption behavior

Zhou

2021

Int J Applied Ceramic Tech

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Iron-containing PSO precursors (FePSO) were synthesized by modification of polysiloxane with different amounts of ferric acetylacetonate [Fe(acac) 3 ], then porous SiFeCO ceramics were successfully prepared by subsequent pyrolysis. The chemical modification and ceramization process of PFSO precursors were studied by FT-IR and TGA measurements. XRD patterns imply that the SiC crystalline can be easily observed when PFSO was exposed to 1200℃ in nitrogen atmosphere, while pure PSO exhibited broad diffraction peaks of SiC at 1500℃, meaning that the grain coarsening of SiC was accelerated by adding iron. The crystallization behavior of ferric silicide (Fe x Si y ) is complex due to the variation of iron content in feed and annealing temperature, and Fe x Si y /SiC@SiOC nanocomposites were produced after annealing. Because of the in-situ formation of SiC, Fe x Si y , and carbon strips in nanocomposites, PFSO-derived ceramics demonstrate enhanced microwave absorption performance. The best effective absorption bandwidth (<−10 dB) and the minimum reflection loss are 2.6 GHz and −38 dB, respectively, which are achieved in the sample PFSO-3-1300℃. Fe x Si y / SiC@SiOC nanocomposites synthesized in this work exhibit potential application in the field of electromagnetic interference, the carbon content and the crystallization behavior of Fe x Si y are the critical factors for the performance optimization.

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Section: Characterizationmentioning

confidence: 99%

Polymer‐derived Fe_xSi_y/SiC@SiOC ceramic nanocomposites with tunable microwave absorption behavior

Zhou

2021

Int J Applied Ceramic Tech

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“…Microfiltration was performed to a volume reduction factor of 2 (the ratio of initial feed volume to the final retentate volume). The oil removal was quantified by total organic carbon analysis (LCK386 kit, HACH, Düsseldorf, Germany), and the average oil rejection coefficients (R%) were calculated according to Equation (2) [32]:…”

Section: Characterizationsmentioning

confidence: 99%

“…Silicon oxycarbides (SiOC) are among the best-researched PDC materials, as they have suitable mechanical properties and physical/chemical stabilities in high-temperature, oxidative and corrosive environments [32]. The SiOC structure consists of a network of corner-shared silicon-centered tetrahedra (Si-C and Si-O bonds) composed of a mixture of SiO 4 , SiO 3 C, SiO 2 C 2 , SiOC 3 and SiC 4 , which remain predominantly amorphous at temperatures up to 1250 • C [33,34].…”

Section: Introductionmentioning

confidence: 99%

Influence of the Pyrolysis Temperature and TiO2-Incorporation on the Properties of SiOC/SiC Composites for Efficient Wastewater Treatment Applications

et al. 2022

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This study focuses on the development of porous ceramer and SiOC composites which are suitable for microfiltration applications, using a mixture of polysiloxanes as the preceramic precursor. The properties of the membranes—such as their pore size, hydrophilicity, specific surface area, and mechanical resistance—were tailored in a one-step process, according to the choice of pyrolysis temperatures (600–1000 °C) and the incorporation of micro- (SiC) and nanofillers (TiO2). Lower pyrolysis temperatures (<700 °C) allowed the incorporation of TiO2 in its photocatalytically active anatase phase, enabling the study of its photocatalytic decomposition. The produced materials showed low photocatalytic activity; however, a high adsorption capacity for methylene blue was observed, which could be suitable for dye-removal applications. The membrane performance was evaluated in terms of its maximum flexural strength, water permeation, and separation of an oil-in-water emulsion. The mechanical resistance increased with an increase of the pyrolysis temperature, as the preceramic precursor underwent the ceramization process. Water fluxes varying from 2.5 to 370 L/m2·h (2 bar) were obtained according to the membrane pore sizes and surface characteristics. Oil-rejection ratios of 81–98% were obtained at an initial oil concentration of 1000 mg/L, indicating a potential application of the produced PDC membranes in the treatment of oily wastewater.

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“…The formation of nano-pores in the particles indicates that there would be significant increase in the size of polymer particles during pyrolysis. These pores were produced in the particle due to hydrogen evolution during pyrolysis [31]. After pyrolysis, further multi-pass FSP was carried out on the composites to re-distribute PDC particles in the matrix.…”

Section: Microstructure Evolution During Pyrolysis and After Further mentioning

confidence: 99%

A novel in-situ polymer derived nano ceramic MMC by friction stir processing

2015

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Phase separation induced macroporous SiOC ceramics derived from polysiloxane

Cited by 31 publications

References 31 publications

Polymer‐derived Fe_xSi_y/SiC@SiOC ceramic nanocomposites with tunable microwave absorption behavior

Polymer‐derived Fe_xSi_y/SiC@SiOC ceramic nanocomposites with tunable microwave absorption behavior

Influence of the Pyrolysis Temperature and TiO2-Incorporation on the Properties of SiOC/SiC Composites for Efficient Wastewater Treatment Applications

A novel in-situ polymer derived nano ceramic MMC by friction stir processing

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Phase separation induced macroporous SiOC ceramics derived from polysiloxane

Cited by 31 publications

References 31 publications

Polymer‐derived FexSiy/SiC@SiOC ceramic nanocomposites with tunable microwave absorption behavior

Polymer‐derived FexSiy/SiC@SiOC ceramic nanocomposites with tunable microwave absorption behavior

Influence of the Pyrolysis Temperature and TiO2-Incorporation on the Properties of SiOC/SiC Composites for Efficient Wastewater Treatment Applications

A novel in-situ polymer derived nano ceramic MMC by friction stir processing

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Polymer‐derived Fe_xSi_y/SiC@SiOC ceramic nanocomposites with tunable microwave absorption behavior

Polymer‐derived Fe_xSi_y/SiC@SiOC ceramic nanocomposites with tunable microwave absorption behavior