caa a22 4500 477092012 CHVBK 20180405111517.0 cr unu---uuuuu 170330e19961201xx s 000 0 eng 10.1007/BF01137912 doi (NATIONALLICENCE)springer-10.1007/BF01137912 Effects of calcining conditions of kaolinite on pore structures of mesoporous materials prepared by the selective leaching of calcined kaolinite [Elektronische Daten] [Yoshitoshi Saito, Shigeo Hayashi, Atsuo Yasumori, Kiyoshi Okada] This paper describes the effects of calcining conditions of kaolinite on pore structures of the porous materials obtained from the selective leaching of calcined kaolinite using KOH solution. Mesoporous γ-Al2O3 was the predominant crystalline phase in the samples calcined in the temperature range between 950°C and 1050°C for 24 h. The mean specific surface area of these samples was approximately 250 m2 · g−1 and the mean total pore volume was approximately 0.8 ml · g−1. The pore size distribution curves of these samples showed a sharp peak at around 2-3 nm pore radius. This peak was sharper for the sample calcined at 1000°C for 24 h. On the other hand, the pore sizes of the sample calcined at 1100°C for 24 h increased abruptly to 10-20 nm and this change corresponded to the formation of mullite in the sample. The pore sizes of the samples calcined at 1100°C varied with calcining time. The specific surface area and total pore volume decreased, the longer the calcining time of the samples, and this was correlated with an increase in the amount of mullite in the samples. Kluwer Academic Publishers, 1996 γ-Al2O3 nationallicence selective leaching method nationallicence pore structure nationallicence Saito Yoshitoshi Department of Inorganic Materials, Tokyo Institute of Technology, O-okayama, 152, Meguro, Tokyo, Japan aut Hayashi Shigeo Department of Inorganic Materials, Tokyo Institute of Technology, O-okayama, 152, Meguro, Tokyo, Japan aut Yasumori Atsuo Department of Inorganic Materials, Tokyo Institute of Technology, O-okayama, 152, Meguro, Tokyo, Japan aut Okada Kiyoshi Department of Inorganic Materials, Tokyo Institute of Technology, O-okayama, 152, Meguro, Tokyo, Japan aut Journal of Porous Materials Kluwer Academic Publishers 3/4(1996-12-01), 233-239 1380-2224 3:4<233 1996 3 10934 https://doi.org/10.1007/BF01137912 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01137912 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Saito Yoshitoshi Department of Inorganic Materials, Tokyo Institute of Technology, O-okayama, 152, Meguro, Tokyo, Japan aut NATIONALLICENCE 700 1- Hayashi Shigeo Department of Inorganic Materials, Tokyo Institute of Technology, O-okayama, 152, Meguro, Tokyo, Japan aut NATIONALLICENCE 700 1- Yasumori Atsuo Department of Inorganic Materials, Tokyo Institute of Technology, O-okayama, 152, Meguro, Tokyo, Japan aut NATIONALLICENCE 700 1- Okada Kiyoshi Department of Inorganic Materials, Tokyo Institute of Technology, O-okayama, 152, Meguro, Tokyo, Japan aut NATIONALLICENCE 773 0- Journal of Porous Materials Kluwer Academic Publishers 3/4(1996-12-01), 233-239 1380-2224 3:4<233 1996 3 10934 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer