Potentials of fabricating porous ceramic bodies from kaolin for catalytic substrate applications

David O. Obada; David Dodoo-Arhin; Muhammad Dauda; Fatai O. Anafi; Abdulkarim S. Ahmed; Olusegun A. Ajayi

doi:10.1016/j.clay.2016.06.006

Potentials of fabricating porous ceramic bodies from kaolin for catalytic substrate applications

David O. Obada, David Dodoo-Arhin, Muhammad Dauda, Fatai O. Anafi, Abdulkarim S. Ahmed, Olusegun A. Ajayi

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

37 Citations (Scopus)

Abstract

In this work, the suitability of using kaolin–styrofoam, sawdust, and high density polyethylene to produce porous ceramic bodies was experimentally investigated. The kaolin samples (raw and beneficiated) were characterized by the XRD, SEM, TGA/DSC and FTIR methods. Batch formulations of the samples including the kaolin and pore formers were formed into green bodies and fired to 1150 °C. The porosities of sintered bodies were calculated and gave the following: apparent porosity: 28.63%–67.13% for all the samples investigated. Samples with high density polyethylene (HDPE) pore formers showed minor surface cracks after firing, but exhibited the highest porosity levels while samples with styrofoam and saw dust exhibited uniform surface characteristics with pores, thermal stability and no visible surface cracks. It can be concluded that formulations containing 80% kaolin can be used for the production of ceramics with porosities as high as 67% if the right pore formers are used.

Original language	English
Pages (from-to)	194-204
Number of pages	11
Journal	Applied Clay Science
Volume	132-133
DOIs	https://doi.org/10.1016/j.clay.2016.06.006
Publication status	Published - 1 Nov 2016
Externally published	Yes

Keywords

Green bodies
Kaolin
Physical properties
Pore formers
Porosity

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10.1016/j.clay.2016.06.006

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title = "Potentials of fabricating porous ceramic bodies from kaolin for catalytic substrate applications",

abstract = "In this work, the suitability of using kaolin–styrofoam, sawdust, and high density polyethylene to produce porous ceramic bodies was experimentally investigated. The kaolin samples (raw and beneficiated) were characterized by the XRD, SEM, TGA/DSC and FTIR methods. Batch formulations of the samples including the kaolin and pore formers were formed into green bodies and fired to 1150 °C. The porosities of sintered bodies were calculated and gave the following: apparent porosity: 28.63%–67.13% for all the samples investigated. Samples with high density polyethylene (HDPE) pore formers showed minor surface cracks after firing, but exhibited the highest porosity levels while samples with styrofoam and saw dust exhibited uniform surface characteristics with pores, thermal stability and no visible surface cracks. It can be concluded that formulations containing 80% kaolin can be used for the production of ceramics with porosities as high as 67% if the right pore formers are used.",

keywords = "Green bodies, Kaolin, Physical properties, Pore formers, Porosity",

author = "Obada, {David O.} and David Dodoo-Arhin and Muhammad Dauda and Anafi, {Fatai O.} and Ahmed, {Abdulkarim S.} and Ajayi, {Olusegun A.}",

note = "Publisher Copyright: {\textcopyright} 2016 Elsevier B.V.",

year = "2016",

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doi = "10.1016/j.clay.2016.06.006",

language = "English",

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T1 - Potentials of fabricating porous ceramic bodies from kaolin for catalytic substrate applications

AU - Obada, David O.

AU - Dodoo-Arhin, David

AU - Dauda, Muhammad

AU - Anafi, Fatai O.

AU - Ahmed, Abdulkarim S.

AU - Ajayi, Olusegun A.

PY - 2016/11/1

Y1 - 2016/11/1

N2 - In this work, the suitability of using kaolin–styrofoam, sawdust, and high density polyethylene to produce porous ceramic bodies was experimentally investigated. The kaolin samples (raw and beneficiated) were characterized by the XRD, SEM, TGA/DSC and FTIR methods. Batch formulations of the samples including the kaolin and pore formers were formed into green bodies and fired to 1150 °C. The porosities of sintered bodies were calculated and gave the following: apparent porosity: 28.63%–67.13% for all the samples investigated. Samples with high density polyethylene (HDPE) pore formers showed minor surface cracks after firing, but exhibited the highest porosity levels while samples with styrofoam and saw dust exhibited uniform surface characteristics with pores, thermal stability and no visible surface cracks. It can be concluded that formulations containing 80% kaolin can be used for the production of ceramics with porosities as high as 67% if the right pore formers are used.

AB - In this work, the suitability of using kaolin–styrofoam, sawdust, and high density polyethylene to produce porous ceramic bodies was experimentally investigated. The kaolin samples (raw and beneficiated) were characterized by the XRD, SEM, TGA/DSC and FTIR methods. Batch formulations of the samples including the kaolin and pore formers were formed into green bodies and fired to 1150 °C. The porosities of sintered bodies were calculated and gave the following: apparent porosity: 28.63%–67.13% for all the samples investigated. Samples with high density polyethylene (HDPE) pore formers showed minor surface cracks after firing, but exhibited the highest porosity levels while samples with styrofoam and saw dust exhibited uniform surface characteristics with pores, thermal stability and no visible surface cracks. It can be concluded that formulations containing 80% kaolin can be used for the production of ceramics with porosities as high as 67% if the right pore formers are used.

KW - Green bodies

KW - Kaolin

KW - Physical properties

KW - Pore formers

KW - Porosity

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VL - 132-133

SP - 194

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JO - Applied Clay Science

JF - Applied Clay Science

ER -

Potentials of fabricating porous ceramic bodies from kaolin for catalytic substrate applications

Abstract

Keywords

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