화학양론 조성의 뮬라이트 합성거동과 입자형상에 미치는 전구체 pH의 영향

이재언; 김재원; 정연길; 장중철; 조창용; Jae-Ean Lee; Jae-Won Kim; Yeon-Gil Jung; Jung-Chel Chang; Chang-Yong Jo

Korean Journal of Materials Research, Vol.12, No.7, 573-579, July, 2002

DOI10.3740/MRSK.2002.12.7.573 Export Citation

화학양론 조성의 뮬라이트 합성거동과 입자형상에 미치는 전구체 pH의 영향

Effects of Precursor pH on Synthesizing Behavior and Morphology of Mullite in Stoichiometric Composition

이재언, 김재원, 정연길 ^†, 장중철¹, 조창용 ²

창원대학교 재료공학과
¹한국전력공사 전력연구원 발전연구실
²한국기계연구원 내열재료그룹

Jae-Ean Lee, Jae-Won Kim, Yeon-Gil Jung^†, Jung-Chel Chang¹, and Chang-Yong Jo²

Department of Ceramic Science and Engineering, Changwon National University, #9 Sarim-dong, Changwon, Kyungnam 641-773, Korea
¹Power Generation Lab., Korea Electric Power Research Institute Korea Electric Power Co., 103-16 Munji-dong Yusung-ku Daejon, 305-380, Korea
²High Temperature Materials Group, Korea Institute of Machinery and Materials, #66 Sangnam-dong, Changwon, 641-010, Korea

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Stoichiometric mullite ( 3Al 2 O 3 . 2SiO 2 ) precursor sol has been prepared by sol-gel method. The effects of the precursor pH and sintering temperature on the synthesizing behavior and morphology of mullite have been studied. Mullite precursor sol was prepared by dissolution of aluminum nitrate enneahydrate (Al( NO 3 ) 3 .9H 2 O)intothemixtureofsilicasol.PrecursorpHofthesolswascontrolledtoacidiccondition( PH\leq1 1.5)andtobasiccondition( pH\geq8.5 9).Thesynthesizedaluminosilicatesolswereformedunder20MPapressureafterdryingat 150^{\circ}Cfor24hours,andthensinteredfor3hoursinthetemperaturerangeof 1100~1600^{\circ}C.FromTGA/DTAanalysis,totalweightlossinthealuminosilicategeloftheacidicsamplewas(equationomitted)56 1200^{\circ}Cand 1300^{\circ}C,respectively.Themorphologiesofthesynthesizedmullitewerefineandneedle?like(orrod?like)foracidicsample,andgranularforbasicsamplethathasbeensinteredabove 1300^{\circ}C$ . It was found that the morphology of mullite particle was predominantly governed by precursor pH and sintering temperature.

Keywords:Sol-gel method;Mullite;Synthesis;Morphology;Precursor pH;Sintering temperature

[References]

Dokko PC, Pask JA, Nazdiyasni KS, J. Am. Ceram. Soc., 60(3-4), 150 (1997)
Tummala RR, J. Am. Ceram. Soc., 74(5), 99 (1983)
Aksay IA, Dabbs DM, Sarikaya M, J. Am. Ceram. Soc., 74(10), 2343 (1991)
Klug J, Prochaka S, J. Am. Ceram. Soc., 70, 750 (1987)
Okada K, et al., Am. Ceram. Soc. Bull., 70, 1633 (1991)
Mah TL, Mazdiyashi KS, J. Am. Ceram. Soc., 66, 699 (1983)
Choi YG, J. Kor. Cerm. Soc., 7(6), 773 (1999)
Hirata Y, Sakeda K, Matsuchma V, Schirnada K, Ishihara V, J. Am. Ceram. Soc., 72(6), 995 (1989)
Hoffman DW, Roy R, Komarneni S, J. Am. Ceram. Soc., 67, 468 (1984)
Jayrnes I, Douy A, Massiot D, Coutures JP, J. Mater. Sci., 3, 4581 (1996)
Rajendran S, Rossell HJ, Sanders JV, J. Mater. Sci., 25(23), 4462 (1990)
Chakraborty AK, J. Mater. Sci., 29(23), 6131 (1994)
Anilkumar GM, Mukundan P, Damodaran AD, Warrier KGW, Mater. Lett., 33, 117 (1997)
Okada K, Otuska N, J. Am. Ceram. Soc., 74, 2414 (1991)
Hong JS, Huang XX, Guo JK, Mater. Lett., 24, 327 (1995)
Song KC, Mater. Lett., 35(6), 290 (1998)
Metcalfe BL, Sant JH, Trans. J. Br. Ceram. Soc., 74(6), 193 (1975)
Kim JW, Kim HC, Kim DH, Seo SM, Jo CY, Choe SJ, Kim JC, Korean J. Mater. Res., 10(3), 233 (2000)
Kim JW, Kim DH, Seo SM, Jo CY, Choe SJ, Kim JC, Park YK, Korean J. Mater. Res., 9(2), 1188 (1999)
Ha CG, Jung YG, Kim JW, Jo CY, Paik U, 'Effect of particle size on gelcasting process and green properties in alumina', Mater. Sci. & Eng. A., in press
Schneider H, Okada K, Pask JA, 'Mullite and Mullite Ceramics', John Wiley & Sons, 1994 (1994)
Temunjin J, Okada K, Mackenzie KJD, Ceram. Inter., 25, 85 (1999)
Sacks MD, Lee HW, Pask JA, 'A review of powder preparation methods and densification procedures for fabricating high density mullite', In: S. Sorniya, R.F. Davis, J.A. Pask (Eds.), 'Ceramic Transactions', Vol 6, 'Mullite and Mullite Matrix Composites', Am. Ceram. Soc., Westerville, OH, (1990) (1990)
Schneider H, Saruhan B, Voll D, 1. Merwin, J. Euro. Ceram. Soc., 11, 87 (1993)
Okada K, Otsuka N, 'Formation process of mullite', In : S. Somiya, R.F. Davis, J.A. Pask (Eds.), 'Ceramic Transactions', Vol 61, 'Mullite and Mullite Matrix Composites', Am. Ceram. Soc., Westerville, OH, (1990) (1990)
Ring TA, 'Fundamentals of Ceramic powder processing and synthesis', 340, Academic Press, 1996 (1996)
Chakravorty A, Ghosh DK, J. Am. Ceram. Soc., 71(11), 978 (1998)

[Referenced By]

[Related Articles]

[1] Dokko PC, Pask JA, Nazdiyasni KS, J. Am. Ceram. Soc., 60(3-4), 150 (1997)

[2] Tummala RR, J. Am. Ceram. Soc., 74(5), 99 (1983)

[3] Aksay IA, Dabbs DM, Sarikaya M, J. Am. Ceram. Soc., 74(10), 2343 (1991)

[4] Klug J, Prochaka S, J. Am. Ceram. Soc., 70, 750 (1987)

[5] Okada K, et al., Am. Ceram. Soc. Bull., 70, 1633 (1991)

[6] Mah TL, Mazdiyashi KS, J. Am. Ceram. Soc., 66, 699 (1983)

[7] Choi YG, J. Kor. Cerm. Soc., 7(6), 773 (1999)

[8] Hirata Y, Sakeda K, Matsuchma V, Schirnada K, Ishihara V, J. Am. Ceram. Soc., 72(6), 995 (1989)

[9] Hoffman DW, Roy R, Komarneni S, J. Am. Ceram. Soc., 67, 468 (1984)

[10] Jayrnes I, Douy A, Massiot D, Coutures JP, J. Mater. Sci., 3, 4581 (1996)

[11] Rajendran S, Rossell HJ, Sanders JV, J. Mater. Sci., 25(23), 4462 (1990)

[12] Chakraborty AK, J. Mater. Sci., 29(23), 6131 (1994)

[13] Anilkumar GM, Mukundan P, Damodaran AD, Warrier KGW, Mater. Lett., 33, 117 (1997)

[14] Okada K, Otuska N, J. Am. Ceram. Soc., 74, 2414 (1991)

[15] Hong JS, Huang XX, Guo JK, Mater. Lett., 24, 327 (1995)

[16] Song KC, Mater. Lett., 35(6), 290 (1998)

[17] Metcalfe BL, Sant JH, Trans. J. Br. Ceram. Soc., 74(6), 193 (1975)

[18] Kim JW, Kim HC, Kim DH, Seo SM, Jo CY, Choe SJ, Kim JC, Korean J. Mater. Res., 10(3), 233 (2000)

[19] Kim JW, Kim DH, Seo SM, Jo CY, Choe SJ, Kim JC, Park YK, Korean J. Mater. Res., 9(2), 1188 (1999)

[20] Ha CG, Jung YG, Kim JW, Jo CY, Paik U, 'Effect of particle size on gelcasting process and green properties in alumina', Mater. Sci. & Eng. A., in press

[21] Schneider H, Okada K, Pask JA, 'Mullite and Mullite Ceramics', John Wiley & Sons, 1994 (1994)

[22] Temunjin J, Okada K, Mackenzie KJD, Ceram. Inter., 25, 85 (1999)

[23] Sacks MD, Lee HW, Pask JA, 'A review of powder preparation methods and densification procedures for fabricating high density mullite', In: S. Sorniya, R.F. Davis, J.A. Pask (Eds.), 'Ceramic Transactions', Vol 6, 'Mullite and Mullite Matrix Composites', Am. Ceram. Soc., Westerville, OH, (1990) (1990)

[24] Schneider H, Saruhan B, Voll D, 1. Merwin, J. Euro. Ceram. Soc., 11, 87 (1993)

[25] Okada K, Otsuka N, 'Formation process of mullite', In : S. Somiya, R.F. Davis, J.A. Pask (Eds.), 'Ceramic Transactions', Vol 61, 'Mullite and Mullite Matrix Composites', Am. Ceram. Soc., Westerville, OH, (1990) (1990)

[26] Ring TA, 'Fundamentals of Ceramic powder processing and synthesis', 340, Academic Press, 1996 (1996)

[27] Chakravorty A, Ghosh DK, J. Am. Ceram. Soc., 71(11), 978 (1998)