Al2TiO5–mullite porous ceramics from particle stabilized wet foam

Sarkar, Naboneeta; Park, Jung Gyu; Mazumder, Sangram; Pokhrel, Ashish; Aneziris, Christos G.; Kim, Ik Jin

doi:10.1016/j.ceramint.2015.01.056

Cited by 36 publications

(21 citation statements)

References 12 publications

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“…Ultrastable wet foams can be produced by direct foaming using particles instead of surfactants as foams stabilizers [16,19,25]. Porous ceramics' properties are also highly influenced by their chemical compositions and microstructures, with porosity, pore morphology, and size distribution being tailored by different compositions, different physical structures of the starting materials, and the use of different amphiphiles [30][31][32][33][34][35][36]. This review focuses on this process.…”

Section: Direct Foamingmentioning

confidence: 99%

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Porous Ceramics

Sarkar¹,

Kim²

2015

Advanced Ceramic Processing

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The unique chemical composition and microstructure of porous ceramics enable the ceramic products used in a number of applications such as filtration of molten metals and hot corrosive gases, high-temperature thermal insulation, support for catalytic reactions, filtration of diesel engine exhaust gases, etc. These applications take advantage of special characteristics of porous ceramics such as low thermal mass, low thermal conductivity, controlled permeability, high surface area, low density, and high specific strength. In this chapter, we emphasize on direct foaming method, a simple and versatile approach that allows fabrication of porous ceramics with tailored microstructure along with distinctive properties. Foam stability is achieved upon controlled addition of amphiphiles to the colloidal suspension, which induce in situ hydrophobization, allowing the wet foam to resist coarsening upon drying and sintering.

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Section: Direct Foamingmentioning

confidence: 99%

“…This technique, reported in the 1960s, is the first method deliberately used for the production of macroporous ceramics [32]. First, polymeric sponges were used as templates to prepare ceramic cellular structures with various pore sizes, porosities and chemical compositions.…”

Section: Replica Techniquesmentioning

confidence: 99%

Porous Ceramics

Sarkar¹,

Kim²

2015

Advanced Ceramic Processing

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“…The water remaining content was 40.5%. By this formulation, which allows percentage changes about ±5% of each major component, ceramic foams made of mullite (Al 6 Si 2 O 13 ) and others compounds like aluminium titanate (Al 2 TiO 5 ) and glass-based binding phases related to SiO 2 (phylosilicates) as starting materials 14 can be obtained ( Figure 1). It is important to remark the presence of wheat gluten below 1% in the slurry, acting as binder, that some authors replace it with ovalbumin, sucrose or other polysaccharides 15 .…”

Section: Methodsmentioning

confidence: 99%

Experience on a Low Cost Way to Obtainal-Ti Ceramic Foams

2015

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An experience on a simple process for producing alumina-rutile-mullite ceramic foams by using aqueous particulate slurries is proposed. The sintering process is achieved in one unique thermal process at 1200 ºC in air. The description of the process, physical properties and morphological studies are reported. Microstructure is studied by using confocal optical microscopic technique. The highly active porous foam structure of this ceramic material produced according to the low-cost process presented here could extend its use in a broad range of applications, such as catalytic, biomedical scaffolds, filtering, etc.

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“…8) Furthermore, due to the steady diffusion of gas molecules from smaller to larger bubbles over time, a broadening of the bubble size distribution occurs. The difference in the Laplace pressure between bubbles of distinct sizes (R) leads to bubble disproportionation and Ostwald ripening.…”

Section: Foaming Air Content and Laplace Pressurementioning

confidence: 99%

“…7) To control these features and allow formation of either open or closed cell ceramics with remarkable stability, direct foaming technique is used. 8) The processing route determines the microstructure of the final macroporous ceramic. Therefore, the selection of a given processing method depends strongly on the microstructures needed in the end application.…”

Section: Introductionmentioning

confidence: 99%

ZrO<sub>2</sub>–TiO<sub>2</sub> porous ceramics from particle stabilized wet foam by colloidal processing

Bhaskar

Park

Lee

et al. 2016

J. Ceram. Soc. Japan

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ZrO 2 TiO 2 porous ceramics recently has been great interest in the dielectric resonator materials, as well as in the fields of preparation of optical devices, and bio materials. This study reveals an approach for the production of micro porous ceramics consisting of TiO 2 and ZrO 2 fabricated by colloidal wet processing. ZrO 2 particles in the colloidal suspension was partially hydrophobized using propyl gallate as an amphiphile, with a suitable pH range. The different mole ratios of the TiO 2 suspension was added to the surface modified ZrO 2 suspension. The contact angle was found to be around 75°with the adsorption free energy of 1.8 © 10 ¹11 2.15 © 10 ¹11 J. The Laplace pressure of about 1.481.24 mPa was determined corresponding to the wet foam stability of about 7680%. The microstructure analysis is done after sintering the dried samples for obtaining the porous ceramics.

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Al2TiO5–mullite porous ceramics from particle stabilized wet foam

Cited by 36 publications

References 12 publications

Porous Ceramics

Porous Ceramics

Experience on a Low Cost Way to Obtainal-Ti Ceramic Foams

ZrO<sub>2</sub>–TiO<sub>2</sub> porous ceramics from particle stabilized wet foam by colloidal processing

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Al2TiO5–mullite porous ceramics from particle stabilized wet foam

Cited by 36 publications

References 12 publications

Porous Ceramics

Porous Ceramics

Experience on a Low Cost Way to Obtainal-Ti Ceramic Foams

ZrO<sub>2</sub>&ndash;TiO<sub>2</sub> porous ceramics from particle stabilized wet foam by colloidal processing

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Product

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ZrO<sub>2</sub>–TiO<sub>2</sub> porous ceramics from particle stabilized wet foam by colloidal processing