Highly porous macro- and micro-cellular ceramics from a polysilazane precursor

Vakifahmetoğlu, Çekdar; Menapace, Ilaria; Hirsch, Andreas; Biasetto, Lisa; Hauser, Ralf; Riedel, Ralf; Colombo, Paolo

doi:10.1016/j.ceramint.2009.05.022

Cited by 90 publications

(76 citation statements)

References 51 publications

(97 reference statements)

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“…For the production of SiCN foams, the method described in Ref. [ 21 ] by using 1 wt% physical blowing agent (ADA 97%, Sigma-Aldrich, St. Louis, MO) was followed. Pyrolysis was subsequently carried out isothermally at 1450, 1500, or 1550 ° C for 2 h with a heating and cooling rate of 2 K min − 1 in an alumina tube furnace.…”

Section: Methodsmentioning

confidence: 99%

Hierarchical Porous Carbide‐Derived Carbons for the Removal of Cytokines from Blood Plasma

Presser¹,

Yeon²,

Vakifahmetoğlu³

et al. 2012

Adv Healthcare Materials

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Section: Methodsmentioning

confidence: 99%

Hierarchical Porous Carbide‐Derived Carbons for the Removal of Cytokines from Blood Plasma

Presser¹,

Yeon²,

Vakifahmetoğlu³

et al. 2012

Adv Healthcare Materials

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“…Macrocellular foams with a cell size ranging between 100 and 600 µm were fabricated from methyl polysiloxane using a direct foaming approach, whereas microcellular foams, with a cell size of about 8 µm, were fabricated using PMMA microbeads as sacrificial templates [82]. SiOC ceramics with hierarchical porosity can also be produced either by controlled pyrolysis, deposition of various meso-porous layers, etching or the addition of suitable fillers [19,[111][112][113]. The pore size, pore morphology and the specific surface areas of polymer-derived ceramic bodies strongly depend on the composition of the preceramic material and on the maximum pyrolysis temperature.…”

Section: Reaction Technique For Matrixmentioning

confidence: 99%

Processing of polysiloxane-derived porous ceramics: a review

Kumar

Kim

2010

Science and Technology of Advanced Materials

111

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Because of the unique combination of their attractive properties, porous ceramics are considered as candidate materials for several engineering applications. The production of porous ceramics from polysiloxane precursors offers advantages in terms of simple processing methodology, low processing cost, and easy control over porosity and other properties of the resultant ceramics. Therefore, considerable research has been conducted to produce various Si(O)C-based ceramics from polysiloxane precursors by employing different processing strategies. The complete potential of these materials can only be achieved when properties are tailored for a specific application, whereas the control over these properties is highly dependent on the processing route. This review deals with processing strategies of polysiloxane-derived porous ceramics. The essential features of processing strategies-replica, sacrificial template, direct foaming and reaction techniques-are explained and the available literature reports are thoroughly reviewed with particular regard to the critical issues that affect pore characteristics. A short note on the cross-linking methods of polysiloxanes is also provided. The potential of each processing strategy on porosity and strength of the resultant SiC or SiOC ceramics is outlined.

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“…The pressure in a small bubble is always greater than that in a big one according to the Laplace equation. Big bubbles will gobble up small ones [29] because of the pressure difference.…”

Section: Microstructural Characterizationmentioning

confidence: 99%

Preparation of ceramic foams suitable for aircraft arresting by the airport runway based on a protein foaming agent

Zhang

Zhou

Yang

et al. 2014

J. Wuhan Univ. Technol.-Mat. Sci. Edit.

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Crushable ceramic foams are more suitable to be used as an arrestor material applied in engineered materials arresting system (EMAS) for airport runway for their properties of widely controllable strength, negligible crushing-rebounding behavior, durability, and chemically-inert composition, comparing with traditional concrete foams. The synthesis of ceramic foams adopted direct-foaming method and used an animal protein as foaming agent. Kaolin, talc powder and alumina were the main raw materials. Effects of the ratios of raw materials, calcination temperatures, heating rates, holding time, viscosities of polyvinyl alcohol (PVA) solution as well as the amounts of protein foaming agent and water on microscopic structure, densities, compressive strength and open porosities of ceramic foams were investigated systematically. The results indicate that ceramic foams with typical pore sizes 100-300 μm, open porosities from 73.1% to 91.5%, densities from 0.25 to 0.62 g·cm 3 , compressive strength from 0.19 to 4.89 MPa, are obtained by properly adjusting the parameters mentioned above. And the mechanical strength meets the requirement for the EMAS for airport runway. In addition, good correlations are observed among compressive strength, open porosity, microscopic structure, and crystal phase. Furthermore, the possibility of producing the general dimensions of such aircraft arresting components with the proposed method was also discussed.

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Highly porous macro- and micro-cellular ceramics from a polysilazane precursor

Cited by 90 publications

References 51 publications

Hierarchical Porous Carbide‐Derived Carbons for the Removal of Cytokines from Blood Plasma

Hierarchical Porous Carbide‐Derived Carbons for the Removal of Cytokines from Blood Plasma

Processing of polysiloxane-derived porous ceramics: a review

Preparation of ceramic foams suitable for aircraft arresting by the airport runway based on a protein foaming agent

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