New cellular ceramics from high alkane phase emulsified suspensions (HAPES)

Suelen Barg; Elisangela Guzi de Moraes; Dietmar Koch; Georg Grathwohl

doi:10.1016/j.jeurceramsoc.2009.02.003

New cellular ceramics from high alkane phase emulsified suspensions (HAPES)

Suelen Barg, Elisangela Guzi de Moraes, Dietmar Koch, Georg Grathwohl

Research output: Contribution to journal › Article › peer-review

Abstract

Open porous mechanically stable ceramic foams are developed by a simple direct foaming process. The new processing route is based on the transition of a surfactant stabilized highly concentrated alkane phase homogeneously distributed in a stabilized aqueous ceramic powder suspension into high performance ceramic foams with porosities up to 90% and cell sizes ranging from 3 to 200 mu m. The droplet size distribution of the high alkane phase emulsified suspensions (HAPES) is efficiently controlled by the stirring velocity during emulsification experimentally investigated for varying powder particle contents. Stable foams with tailored structural features can be prepared by adjusting the theological characteristics of HAPES being dependent on the system and process parameters. The influence of the emulsification stirring velocity on the resulting HAPES droplet size is analysed on the basis of the Taylor model of mechanical shearing describing the stresses responsible for the fragmentation of the droplets. (C) 2009 Elsevier Ltd. All rights reserved.

Original language	English
Pages (from-to)	2439-2446
Number of pages	8
Journal	Journal of the European Ceramic Society
Volume	29
Issue number	12
DOIs	https://doi.org/10.1016/j.jeurceramsoc.2009.02.003
Publication status	Published - 2009

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10.1016/j.jeurceramsoc.2009.02.003

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title = "New cellular ceramics from high alkane phase emulsified suspensions (HAPES)",

abstract = "Open porous mechanically stable ceramic foams are developed by a simple direct foaming process. The new processing route is based on the transition of a surfactant stabilized highly concentrated alkane phase homogeneously distributed in a stabilized aqueous ceramic powder suspension into high performance ceramic foams with porosities up to 90% and cell sizes ranging from 3 to 200 mu m. The droplet size distribution of the high alkane phase emulsified suspensions (HAPES) is efficiently controlled by the stirring velocity during emulsification experimentally investigated for varying powder particle contents. Stable foams with tailored structural features can be prepared by adjusting the theological characteristics of HAPES being dependent on the system and process parameters. The influence of the emulsification stirring velocity on the resulting HAPES droplet size is analysed on the basis of the Taylor model of mechanical shearing describing the stresses responsible for the fragmentation of the droplets. (C) 2009 Elsevier Ltd. All rights reserved.",

author = "Suelen Barg and {de Moraes}, {Elisangela Guzi} and Dietmar Koch and Georg Grathwohl",

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TY - JOUR

T1 - New cellular ceramics from high alkane phase emulsified suspensions (HAPES)

AU - Barg, Suelen

AU - de Moraes, Elisangela Guzi

AU - Koch, Dietmar

AU - Grathwohl, Georg

N1 - Times Cited: 28

PY - 2009

Y1 - 2009

N2 - Open porous mechanically stable ceramic foams are developed by a simple direct foaming process. The new processing route is based on the transition of a surfactant stabilized highly concentrated alkane phase homogeneously distributed in a stabilized aqueous ceramic powder suspension into high performance ceramic foams with porosities up to 90% and cell sizes ranging from 3 to 200 mu m. The droplet size distribution of the high alkane phase emulsified suspensions (HAPES) is efficiently controlled by the stirring velocity during emulsification experimentally investigated for varying powder particle contents. Stable foams with tailored structural features can be prepared by adjusting the theological characteristics of HAPES being dependent on the system and process parameters. The influence of the emulsification stirring velocity on the resulting HAPES droplet size is analysed on the basis of the Taylor model of mechanical shearing describing the stresses responsible for the fragmentation of the droplets. (C) 2009 Elsevier Ltd. All rights reserved.

AB - Open porous mechanically stable ceramic foams are developed by a simple direct foaming process. The new processing route is based on the transition of a surfactant stabilized highly concentrated alkane phase homogeneously distributed in a stabilized aqueous ceramic powder suspension into high performance ceramic foams with porosities up to 90% and cell sizes ranging from 3 to 200 mu m. The droplet size distribution of the high alkane phase emulsified suspensions (HAPES) is efficiently controlled by the stirring velocity during emulsification experimentally investigated for varying powder particle contents. Stable foams with tailored structural features can be prepared by adjusting the theological characteristics of HAPES being dependent on the system and process parameters. The influence of the emulsification stirring velocity on the resulting HAPES droplet size is analysed on the basis of the Taylor model of mechanical shearing describing the stresses responsible for the fragmentation of the droplets. (C) 2009 Elsevier Ltd. All rights reserved.

U2 - 10.1016/j.jeurceramsoc.2009.02.003

DO - 10.1016/j.jeurceramsoc.2009.02.003

M3 - Article

SN - 0955-2219

VL - 29

SP - 2439

EP - 2446

JO - Journal of the European Ceramic Society

JF - Journal of the European Ceramic Society

IS - 12

ER -

New cellular ceramics from high alkane phase emulsified suspensions (HAPES)

Abstract

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