Optimum Conditions to Prepare Spherical Alumina Powder with Controlled Aggregation under the W/O Emulsion Method

Yoong Lee; Yeong Min Hahm; Dong-Hyun Lee

Journal of Industrial and Engineering Chemistry, Vol.10, No.5, 826-833, September, 2004

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Optimum Conditions to Prepare Spherical Alumina Powder with Controlled Aggregation under the W/O Emulsion Method

Yoong Lee, Yeong Min Hahm^†, and Dong-Hyun Lee¹

Department of Chemical Engineering, College of Engineering, Dankook University, Seoul 140-714, Korea
¹Department of Chemical Engineering, Sung Kyun Kwan University, Su-Won 440-746, Korea

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Optimum conditions were established to fabricate spherical α-Al₂O₃ powder with controlled aggregation phenomena by using aluminum nitrate, as a starting material, under the W/O emulsion method. Aq. Al₂O₃ sol was employed as the water phase (W) and paraffin oil containing 2 vol. % SP80 as the oil phase (O). As experimental parameters, we chose (1) different types of pH adjustors, (2) various preparation times during the production of aq. Al₂O₃ sol at pH = 3, (3) diverse agitation times during formation of W/O emulsion at 2000 rpm and an 8:1 O:W volumetric ratio, and (4) the removal method of organic components, such as the use of paraffin oil and an emulsifier involved in gelled emulsion. α-Al₂O₃ powder with properties coinciding with the goals of this study were prepared by using an aq. Al₂O₃ sol of pH = 3 which was produced from Al(NO₃)₃and 25% NH₄OH at 80℃ during a preparation time of 3 hrs, for the formation of an emulsion, which was formed during an agitation time of 1 hr, and then through combustion of this emulsion after gellation with the usage of (CH₃CH₂)₃N.

Keywords:α-Al₂O₃ powder;aluminum nitrate;W/O emulsion;paraffin oil;SP80

[References]

Hart LD, Lense E, Alumina Chemicals: Science and Technology Handbook, American Ceramic Society, pp. 97~98 (1990)
Jokanovic V, Janackovic DJ, Spasic AM, Uskokovic D, Mater. Trans., 37, 627 (1996)
Yu ZQ, J. Mater. Res., 13, 3017 (1998)
Wang ZM, Lin YS, J. Catal., 174(1), 43 (1998)
Zolotovskii BP, Buyanov RA, Bukhtiyarova GA, Taraban EA, Murin VI, Grunval'd VR, Demin VV, Saifullin RA, Russ. J. Appl. Chem., 70, 285 (1997)
Kamiya K, Yotani J, Senba R, Matsuoka J, Nasu H, J. Ceram. Soc. Jpn., 104, 685 (1996)
Kobayashi Y, Kawashima D, Tomita A, Chem. Mater., 9, 1887 (1997)
Johannessen T, Pratsinis SE, Livbjerg H, Chem. Eng. Sci., 55(1), 177 (2000)
Morinaga K, Torikai T, Nakagawa K, Fujino S, Acta Mater., 48, 4735 (2000)
Sarikaya Y, Sevinc I, Akinc M, Powder Technol., 116(1), 109 (2001)
Pathak LC, Singh TB, Das S, Verma AK, Ramachandrarao P, Mater. Lett., 57, 380 (2002)
Sarikaya Y, Alemdaroglu T, Onal M, J. European Ceram. Soc., 22, 305 (2002)
Shaklee CA, Messing GL, J. Am. Ceram. Soc., 77, 2977 (1991)
Bell NS, Cho SB, Adair JH, J. Am. Ceram. Soc., 81, 1411 (1998)
Umakoshi M, Yoshitomi T, J. Mater. Sci., 30, 1540 (1995)
Kumar PM, Balasubramanian C, Sali ND, Bhoraskar SV, Rohatgi VK, Badrinarayanan S, Mater. Sci. Eng. B-Solid State Mater. Adv. Technol., B63, 215 (1999)
Oh SM, Park DW, Korean J. Chem. Eng., 17(3), 299 (2000)
Hirano S, Bull. Cer. Soc. Jpn., 22, 1052 (1987)
Lee JM, Lim KH, J. Ind. Eng. Chem., 9(3), 248 (2003)
Lee JM, Lim KH, J. Ind. Eng. Chem., 8(1), 89 (2002)
Kim DW, Noh ST, J. Ind. Eng. Chem., 9(5), 537 (2003)
Chatterjee M, Naskar MK, Siladitya B, Ganguli D, J. Mater. Res., 15, 176 (2000)
Lee Y, Hahm YM, J. Ind. Eng. Chem., 9(6), 713 (2003)

[Referenced By]

[Related Articles]

[1] Hart LD, Lense E, Alumina Chemicals: Science and Technology Handbook, American Ceramic Society, pp. 97~98 (1990)

[2] Jokanovic V, Janackovic DJ, Spasic AM, Uskokovic D, Mater. Trans., 37, 627 (1996)

[3] Yu ZQ, J. Mater. Res., 13, 3017 (1998)

[4] Wang ZM, Lin YS, J. Catal., 174(1), 43 (1998)

[5] Zolotovskii BP, Buyanov RA, Bukhtiyarova GA, Taraban EA, Murin VI, Grunval'd VR, Demin VV, Saifullin RA, Russ. J. Appl. Chem., 70, 285 (1997)

[6] Kamiya K, Yotani J, Senba R, Matsuoka J, Nasu H, J. Ceram. Soc. Jpn., 104, 685 (1996)

[7] Kobayashi Y, Kawashima D, Tomita A, Chem. Mater., 9, 1887 (1997)

[8] Johannessen T, Pratsinis SE, Livbjerg H, Chem. Eng. Sci., 55(1), 177 (2000)

[9] Morinaga K, Torikai T, Nakagawa K, Fujino S, Acta Mater., 48, 4735 (2000)

[10] Sarikaya Y, Sevinc I, Akinc M, Powder Technol., 116(1), 109 (2001)

[11] Pathak LC, Singh TB, Das S, Verma AK, Ramachandrarao P, Mater. Lett., 57, 380 (2002)

[12] Sarikaya Y, Alemdaroglu T, Onal M, J. European Ceram. Soc., 22, 305 (2002)

[13] Shaklee CA, Messing GL, J. Am. Ceram. Soc., 77, 2977 (1991)

[14] Bell NS, Cho SB, Adair JH, J. Am. Ceram. Soc., 81, 1411 (1998)

[15] Umakoshi M, Yoshitomi T, J. Mater. Sci., 30, 1540 (1995)

[16] Kumar PM, Balasubramanian C, Sali ND, Bhoraskar SV, Rohatgi VK, Badrinarayanan S, Mater. Sci. Eng. B-Solid State Mater. Adv. Technol., B63, 215 (1999)

[17] Oh SM, Park DW, Korean J. Chem. Eng., 17(3), 299 (2000)

[18] Hirano S, Bull. Cer. Soc. Jpn., 22, 1052 (1987)

[19] Lee JM, Lim KH, J. Ind. Eng. Chem., 9(3), 248 (2003)

[20] Lee JM, Lim KH, J. Ind. Eng. Chem., 8(1), 89 (2002)

[21] Kim DW, Noh ST, J. Ind. Eng. Chem., 9(5), 537 (2003)

[22] Chatterjee M, Naskar MK, Siladitya B, Ganguli D, J. Mater. Res., 15, 176 (2000)

[23] Lee Y, Hahm YM, J. Ind. Eng. Chem., 9(6), 713 (2003)