Rapid sintering of silicon nitride foams decorated with one-dimensional nanostructures by intense thermal radiation

Li, Duan; Moraes, Elisângela Guzi de; Guo, Peng; Zou, Ji; Zhang, Junzhan; Colombo, Paolo; Shen, Zhijian

doi:10.1088/1468-6996/15/4/045003

Cited by 18 publications

(12 citation statements)

References 36 publications

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“…Although the drainage could be unavoidable, the fresh foams could behave like whipped cream and be stable to be dried when surfactant concentration and pH value of the suspension are appropriate, making them be molded into complicate shapes. Meanwhile, the single layer of particles attached on the liquid/air interface could grow up to form interlocking microstructure at the following sintering process, along with their uniform pores, resulting in the ultralight Si 3 N 4 ceramic foams with high compressive strength compared with other routes of direct foaming method (see Table ).…”

Section: Resultsmentioning

confidence: 99%

Ultralight Silicon Nitride Ceramic Foams from Foams Stabilized by Partially Hydrophobic Particles

Zhang

Huo

et al. 2016

J. Am. Ceram. Soc.

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Ultralight Si3N4 ceramic foams have been successfully prepared through particle‐stabilized foams method, which is based on the adsorption of in situ hydrophobized Si3N4 particles to the liquid/air interface of the foams. Here, we firstly used a long‐chain surfactant cetyltrimethylammonium chloride to render the Si3N4 particles partially hydrophobic. By tailoring the surfactant concentration and pH values of the suspensions, the wet foams were stabilized to avoid coarsening and coalescence. SEM results show that the Si3N4 ceramic foams possess single strut walls with elongated β‐Si3N4 grains interlocking with each other, and their pores are uniform with an average pore size of 95 μm. The obtained ceramic foams maintain compressive strength of 1.34 ± 0.13 MPa with porosity of 92.0%, when the suspension contains 3 mmol/L surfactant at the pH of 11.0.

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Section: Resultsmentioning

confidence: 99%

Ultralight Silicon Nitride Ceramic Foams from Foams Stabilized by Partially Hydrophobic Particles

Zhang

Huo

et al. 2016

J. Am. Ceram. Soc.

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“…For industrial dust filtration purpose, ceramic foams play an important role as they possess better high-temperature resistance compared with organic materials and lighter weight compared with metallic materials. Meanwhile, a hierarchical porous structure is often required for the efficient capture of dust particles with a wide size distribution [4][5][6].…”

Section: Introduction mentioning

confidence: 99%

Formation of hierarchical Si3N4 foams by protein-based gelcasting and chemical vapor infiltration

et al. 2021

J Adv Ceram

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Silicon nitride foams with a hierarchical porous structure was formed by the combination of protein-based gelcasting, chemical vapor infiltration, and in-situ growth of silicon nitride nanowires. The porosity of the foams can be controlled at 76.3–83.8 vol% with an open porosity of 70.2– 82.8 vol%. The pore size distribution was presented in three levels: < 2 μm (voids among grains and cross overlapping of silicon nitride nanowires (SNNWs)), 10–50 μm (cell windows), and >100 μm (cells). The resulted compressive strength of the porous bodies at room temperature can achieve up to 18.0±1.0 MPa (porosity = 76.3 vol%) while the corresponding retention rate at 800 ℃ was 58.3%. Gas permeability value was measured to be 5.16 (cm3·cm)/(cm2·s·kPa). The good strength, high permeability together with the pore structure in multiple scales enabled the foam materials for microparticle infiltration applications.

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“…In regard to the synthesis of Si 3 N 4 nanowires, carbothermal reduction reaction of silica method is considered as a simple, low‐cost, efficient and tunable way. More importantly, the key of this method is sintering reaction process, which determines quality of nanowires directly.…”

Section: Introductionmentioning

confidence: 99%

Novel micro‐spherical Si₃N₄ nanowire sponges from carbon‐doped silica sol foams via reverse templating method

et al. 2018

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A novel kind of nanowire sponges, namely Si3N4 nanowire‐weaving microspheres, synthesized from a simple, convenient, high‐efficient approach are proposed here. As the reverse template, three‐dimensional foam skeleton structure with uniform pores and ultrathin pore walls is constructed via the effective particle‐stabilized foam method, where the silica sol and carbon black are chosen as the raw materials, providing the sufficient space for the growth of nanowires during the carbothermal reduction reaction process. The formation mechanism of this novel sponge is studied via multiple characterization methods. Si3N4 nanowires formed microspheres possess uniform and curving morphology due to the stable environment for growing via vapor–solid mechanism, leading to the relatively high specific surface area of 86.77 m2/g. Owing to in‐situ oxidation process, micro‐spherical SiO2 nanowire sponges with similar morphology are synthesized, which present diameter in range of 20‐40 nm and specific surface area of 50.47 m2/g. This work provides insights for the design of high‐performance nanowire sponges with promising applications in the filtration, thermal insulators, and catalyst supports fields.

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Rapid sintering of silicon nitride foams decorated with one-dimensional nanostructures by intense thermal radiation

Cited by 18 publications

References 36 publications

Ultralight Silicon Nitride Ceramic Foams from Foams Stabilized by Partially Hydrophobic Particles

Ultralight Silicon Nitride Ceramic Foams from Foams Stabilized by Partially Hydrophobic Particles

Formation of hierarchical Si3N4 foams by protein-based gelcasting and chemical vapor infiltration

Novel micro‐spherical Si₃N₄ nanowire sponges from carbon‐doped silica sol foams via reverse templating method

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Rapid sintering of silicon nitride foams decorated with one-dimensional nanostructures by intense thermal radiation

Cited by 18 publications

References 36 publications

Ultralight Silicon Nitride Ceramic Foams from Foams Stabilized by Partially Hydrophobic Particles

Ultralight Silicon Nitride Ceramic Foams from Foams Stabilized by Partially Hydrophobic Particles

Formation of hierarchical Si3N4 foams by protein-based gelcasting and chemical vapor infiltration

Novel micro‐spherical Si3N4 nanowire sponges from carbon‐doped silica sol foams via reverse templating method

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Product

Resources

About

Novel micro‐spherical Si₃N₄ nanowire sponges from carbon‐doped silica sol foams via reverse templating method