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Al2O3-TiO2/ZrO2-SiO2 based porous ceramics from particle-stabilized wet foam

Journal of Advanced Ceramics 2017年第2期6卷 129-138页

作者： Bijay BASNET Naboneeta SARKAR Jung Gyu PARK Sangram MAZUMDER Ik Jin KIM Institute of Processing and Application of Inorganic Materials(PAIM) Hanseo University # 360 Seosan-siChungnam 356-706 Republic of Korea School of Mechanical and Materials Engineering Washington State University Pullman Washington United States

The porous ceramics based on Al2O3–TiO2/ZrO2–SiO2 from particle-stabilized wet foam by direct foaming were discussed. The initial Al2O3–TiO2 suspension was prepared by adding TiO2 suspension to partially hydrophobized colloidal Al2O3 suspension with equimolar amount, to form Al2TiO5 on sintering. The secondary ZrO2–SiO2 suspension was prepared using the equimolar composition, and to obtain ZrSiO4, ZrTiO4, and mullite phases in the sintered samples, the secondary suspension was blended into the initial suspension at 0, 10, 20, 30, and 50 vol%. The wet foam exhibited an air content up to 87%, Laplace pressure from 1.38 to 2.23 mPa, and higher adsorption free energy at the interface of approximately 5.8×108 to 7.5×108 J resulting an outstanding foam stability of 87%. The final suspension was foamed, and the wet foam was sintered from 1400 to 1600 °C for 1 h. The porous ceramics with pore size from 150 to 400 μm on average were obtained. The phase identification was accomplished using X-ray diffraction (XRD), differential thermal analysis (DTA), and thermogravimetric analysis (TGA), and microstructural analysis was performed using field emission scanning electron microscopy (FESEM).

关键词： Al 2 TiO 5 direct foaming Laplace pressure adsorption free energy porous ceramics

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Carbon nanotube formation using zeolite template and applications

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Journal of Advanced Ceramics 2012年第3期1卷 179-193页

作者： Wei ZHAO Bijay BASNET Ik Jin KIM Institute for Processing and Application of Inorganic Materials(PAIM) Department of Materials Science and EngineeringHanseo UniversitySeosan city 356-706Korea

Carbon nanotubes(CNTs)have attracted intensive interests of researchers for a long time due to their fascinating physical and chemical properties promising for various potential applications,including advanced ceramics,nanoelectronic devices,nanoscale sensors,solar cells,battery electrode,field emitters,etc..This review summarized the synthetic methods of CNTs,with an emphasis on the chemical vapor deposition(CVD)method,especially catalytic CVD.Although there still are some challenges in the way,with the development of the technology,a hope for widespread applications always exists.

关键词： carbon nanotubes catalytic chemical vapor deposition zeolite template catalyst

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