TY - GEN
T1 - Preparation of a pore self-forming macro-/mesoporous gehlenite ceramic by the organic sterlc entrapment (PVA) technique
AU - Jia, Dechang
AU - Kim, Dong Kyu
AU - Kriven, Waltraud M.
PY - 2008
Y1 - 2008
N2 - The organic steric entrapment (PVA) method has been successfully used to develop a pore self-forming, macro-/mesoporous gehlenite (2CaO·Al 2O3SiO2 or "C2AS") ceramic. The C2AS ceramic manifests a very good pore self-forming ability, no vesicants and additives need to be incorporated, and no hydrothermal treatment is needed, as is generally the case in other kinds of porous ceramics or glasses. The pore self-forming behavior is accompanied by a significant volume expansion (∼134%) of the samples. The pores can be either open or closed, and the total porosity attains ∼80%. The porous ceramic "sintered" at 1400°C for 1 h has a flexure strength value of 11.2 ± 3.4 MPa, after being further thermally etched at 1200 °C for 1h, its bending strength value having increased to 15.4 ± 4.2 MPa. The mechanism for the pore self-forming behavior is discussed.
AB - The organic steric entrapment (PVA) method has been successfully used to develop a pore self-forming, macro-/mesoporous gehlenite (2CaO·Al 2O3SiO2 or "C2AS") ceramic. The C2AS ceramic manifests a very good pore self-forming ability, no vesicants and additives need to be incorporated, and no hydrothermal treatment is needed, as is generally the case in other kinds of porous ceramics or glasses. The pore self-forming behavior is accompanied by a significant volume expansion (∼134%) of the samples. The pores can be either open or closed, and the total porosity attains ∼80%. The porous ceramic "sintered" at 1400°C for 1 h has a flexure strength value of 11.2 ± 3.4 MPa, after being further thermally etched at 1200 °C for 1h, its bending strength value having increased to 15.4 ± 4.2 MPa. The mechanism for the pore self-forming behavior is discussed.
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M3 - Conference contribution
AN - SCOPUS:57649244179
SN - 9780470196403
T3 - Ceramic Engineering and Science Proceedings
SP - 67
EP - 75
BT - Developments in Porous, Biological and Geopolymer Ceramics - A Collection of Papers Presented at the 31st International Conference on Advanced Ceramics and Composites
T2 - 31st International Conference on Advanced Ceramics and Composites
Y2 - 21 January 2007 through 26 January 2007
ER -