Instrument for ceramic particle dispersion

Isobe, Toshihiro; Ooyama, Asami; Kameshima, Yoshikazu; Nakajima, Akira; Okada, Kiyoshi

doi:10.1016/j.powtec.2010.02.002

Cited by 8 publications

(2 citation statements)

References 15 publications

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“…The optimum amount of PAA was estimated from viscosity measurements of the ␣-Al 2 O 3 -PAA-water system, which is also presented in Table 1. Mixing was done using the planetarytype mixer [18,19] without stainless steel mesh for 1 min, rotated at 800 rpm and revolved at 2000 rpm for 5 min. Subsequently, the mixtures were treated for 5 min using a mixer with the mesh to disperse the ␣-Al 2 O 3 particles in the slurry.…”

Section: Preparation Of the Al 2 O 3 Filtermentioning

confidence: 99%

Preparation and gas permeability of the surface-modified porous Al₂O₃ ceramic filter for CO₂ gas separation

Isobe

Shimizu

Matsushita

et al. 2013

Journal of Asian Ceramic Societies

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a b s t r a c tAl 2 O 3 filters for CO 2 gas separation were prepared by slip casting method. Average pore size and porosity of the obtained Al 2 O 3 filters were about 74 nm and 40%, respectively. To evaluate the pore size effect, the Al 2 O 3 filters having average pore size of 760 nm were also prepared. FE-SEM micrographs show fine new crystals on the pore surface. They were synthesized by hydrothermal treatment, and were identified to AlOOH by XRD and XPS. Both gas selectivity of the filter having larger pore size were about 1, which indicated that this filter has no gas separation capability. In contrast, the gas selectivity of the Al 2 O 3 filter with 74 nm pores became about 1.47 at 0.01 MPa. The N 2 /CO 2 gas selectivity was improved by controlling the pore size and the chemical properties of a pore surface precisely and by setting an appropriate gas permeation pressure.

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Section: Preparation Of the Al 2 O 3 Filtermentioning

confidence: 99%

Preparation and gas permeability of the surface-modified porous Al₂O₃ ceramic filter for CO₂ gas separation

Isobe

Shimizu

Matsushita

et al. 2013

Journal of Asian Ceramic Societies

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“…Instruments designed for particle dispersion have been developed on the basis of dispersion data. 55),56) Furthermore, porous ceramic pore sizes were precisely controlled by means of the sintering condition. 57) Based on these results, Al 2 O 3 filters having average pore sizes of 74 nm and 40% porosity were obtained.…”

Section: Gas Separation Filtersmentioning

confidence: 99%

Evaluation and control of the interaction between inorganic particle surfaces: application to environmental functional materials

Isobe

2013

J. Ceram. Soc. Japan

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The interaction between solid surfaces was evaluated by scanning probe microscopy using a colloidal probe. The dispersant provided a repulsive force between the solid surfaces at less than 30 nm. On the other hand, the binder provided a bridging force between the solid surfaces for retraction at less than 500 nm. Because of the complicated nature of the forces acting between the surfaces, the separation distance between ceramic particles (SDP) was calculated. Moreover, the relation between the agglomeration/dispersion of Al 2 O 3 particles and the calculated SDP were discussed. As an extension of these results, Al 2 O 3 pastes were prepared for tape casting from a viewpoint of the SDP. The tape casting of nanoparticles, which is generally difficult, was successful. On the basis of these fundamental studies applied to environmental functional materials, porous ceramics having oriented pores were prepared by an extrusion method. The obtained porous ceramics demonstrate high capillary action and are used for the relaxation of an urban heat island. Porous ceramics having nano-sized pores were prepared by a slip casting method. The porous filter has CO 2 gas separation ability by using surface diffusion.

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Pore size control of Al2O3 ceramics using two-step sintering

Isobe

Ooyama

Shimizu

et al. 2012

Ceramics International

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Instrument for ceramic particle dispersion

Cited by 8 publications

References 15 publications

Preparation and gas permeability of the surface-modified porous Al₂O₃ ceramic filter for CO₂ gas separation

Preparation and gas permeability of the surface-modified porous Al₂O₃ ceramic filter for CO₂ gas separation

Evaluation and control of the interaction between inorganic particle surfaces: application to environmental functional materials

Pore size control of Al2O3 ceramics using two-step sintering

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Instrument for ceramic particle dispersion

Cited by 8 publications

References 15 publications

Preparation and gas permeability of the surface-modified porous Al2O3 ceramic filter for CO2 gas separation

Preparation and gas permeability of the surface-modified porous Al2O3 ceramic filter for CO2 gas separation

Evaluation and control of the interaction between inorganic particle surfaces: application to environmental functional materials

Pore size control of Al2O3 ceramics using two-step sintering

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Preparation and gas permeability of the surface-modified porous Al₂O₃ ceramic filter for CO₂ gas separation

Preparation and gas permeability of the surface-modified porous Al₂O₃ ceramic filter for CO₂ gas separation