알루미나/지르코니아 테이프 케스팅 슬러리의 분산과 레올로지에 미치는 용매혼합의 영향

김지현; 양태영; 이윤복; 윤석영; 박홍채; J.H. Kim; T.Y. Yang; Y.B. Lee; S.Y. Yoon; H.C. Park

Korean Journal of Materials Research, Vol.11, No.6, 519-526, June, 2001

Export Citation

알루미나/지르코니아 테이프 케스팅 슬러리의 분산과 레올로지에 미치는 용매혼합의 영향

Effects of Solvent Mixtures on Dispersion and Rheology of Alumina/zirconia Tape Casting Slurries

김지현, 양태영, 이윤복, 윤석영 , 박홍채

부산대학교 재료공학부

J.H. Kim, T.Y. Yang, Y.B. Lee, S.Y. Yoon , and H.C. Park

School of Materials Science and Engineering, Pusan National University, Pusan 609-735, Korea

초록

Al 2 O 3 /ZrO 2 비수성 현탁액의 분산과 레올로지에 미치는 methyl isobutyl ketone (MIBK) /ethanol (EtOH) 용매혼합의 영향을 침전밀도, 점도를 측정함으로써 조사하였다. 분산제 'Hypermer' KD-1이 첨가된 다량의 MIBK를 함유하는 용매 ( ≥ 60vol%)에서 Al 2 O 3 와 ZrO 2 입자의 침전밀도는 증가하였다. 80MIBK/20EtOH(vol%)에서 ball milling한 현탁액이 좁고 unimodal한 입자크기분포를 나타내었다. 모든 현탁액은 의가소성유동을 나타내었으나 shear thinning은 Al 2 O 3 /ZrO 2 의 혼합비, MIBK/EtOH의 혼합비에 따라서 다소 다르게 거동하였다. 순수한 MIBK를 사용한 Al 2 O 3 ( ?1 ) 및 ZrO 2 ( ?1 ) 현탁액은 주어진 전단속도범위내에서 가장 강한 shear thinning을 나타내었다. 동일한 용매 (80MIBK/20EtOH, vol%)를 사용한 경우의 shear thinning은 Al 2 O 3 /ZrO 2 의 혼합비에 거의 의존하지 않았다.

The effects of methyl isobutyl ketone(MIBK)/ethanol(EtOH) solvent mixtures on the dispension, particle size distribution and rheology of Al 2 O 3 /ZrO 2 nonaqueous suspensions were investigated by measuring sedimentation density and viscosity. The sedimentation density of Al 2 O 3 and ZrO 2 particles increased in MIBK-rich( ≥ 60 vol%) solvents with 'Hypermer' KD-1 as a dispersant. The ball-milled suspensions in 80MIBK/20EtOH(vol%) solvent exhibited the narrow and unimodal particle size distribution. Although all Suspensions exhibited the Pseduo-Plastic flow(Shear thinning) the shear thinning behavior was somewhat different depending on the mixture ratio of Al 2 O 3 /ZrO 2 and MIBK/EtOH. Under a given shear rate( ?1 for Al 2 O 3 ; ?1 for ZrO 2 ) the strongest shear thinning appeared in the Al 2 O 3 and ZrO 2 suspensions with pure MIBK solvent. The shear thinning was nearly independable on the mixture ratio of Al 2 O 3 /ZrO 2 in case of using the identical solvent(80MIBK/20EtOH, vol%).

Keywords:methyl isobutyl ketone(MIBK)/ethanol(EtON);dissension;rheology;Al 2 O 3 /ZrO 2 nonaqueous suspensions;shear thinning

[References]

Claussen N, J. Am. Ceram. Soc., 59(1-2), 49 (1976)
Moffatt WC, Bowen HK, J. Mater. Sci., 24, 3989 (1989)
Green DJ, J. Am. Ceram. Soc., 65(12), 610 (1982)
Green DJ, Hannink RHJ, Swain MV, Transformation Toughening of Ceramics, pp. 57-93, CRC Press, Inc., Boca Raton, Florida, (1989) (1989)
Wang J, Stevens R, J. Mater. Sci., 24, 3421 (1989)
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Braun L, Morris JR Jr, Cannon WR, Am. Ceram. Soc. Bull., 64(5), 727 (1985)
Boch P, Chartier T, J. Am. Ceram. Soc., 74(10), 2248 (1991)
Sacks MD, khadilkar CS, J. Am. Ceram. Soc., 66(7), 488 (1983)
Fiori C, De Portu G, Novel Ceramic Fabrication Processes and Applications, pp. 213-215, Edited by Davidge RW, The Institute of Ceramics, Stoke-on-Trent, U. K. (1986) (1986)
Boch P, Chartler T, Huttepain M, J. Am. Ceram. Soc., 69(8), C191 (1986)
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Barton AFM, CRC Handbook of Solubility Parameters and Other Cohesion Parameters, CRC Press, Boca Raton. FL. (1983) (1983)
Shanefield DJ, Multilayer Ceramic Devices, pp. 155-160, edited by Blum JB, American Ceramic Society, Westerville, OH, (1986) (1986)
Tormey ES, Pober RL, Bowen HK, Calvert PD, Forming of Cermaics, pp. 140-149, edited by Mangels JA, American Ceramic Society, Columbus, OH, (1984) (1984)
De Kruif CG, Hydrodynamics of Dispersed Media, edited by Hulin JP, Cazabat AM, Guyon E, Carmona F, p. 79, Elsevier, North Holland, (1990) (1990)

[Related Articles]

[1] Claussen N, J. Am. Ceram. Soc., 59(1-2), 49 (1976)

[2] Moffatt WC, Bowen HK, J. Mater. Sci., 24, 3989 (1989)

[3] Green DJ, J. Am. Ceram. Soc., 65(12), 610 (1982)

[4] Green DJ, Hannink RHJ, Swain MV, Transformation Toughening of Ceramics, pp. 57-93, CRC Press, Inc., Boca Raton, Florida, (1989) (1989)

[5] Wang J, Stevens R, J. Mater. Sci., 24, 3421 (1989)

[6] Mistler RE, Shanefield DJ, Runk RB, Ceramic Processing Before Firing, pp. 411-448, Edited by Onoda GY, Hench LL, Wiley, New York, 1978 (1978)

[7] Williams JC, Treatise on Materials Science and Technology, Vol. 9, pp. 173-198, Edited by Wang FFY, Academic Press, New York, (1976) (1976)

[8] Moreno R, Am. Ceram. Soc. Bull, 71(10), 1521 (1992)

[9] Braun L, Morris JR Jr, Cannon WR, Am. Ceram. Soc. Bull., 64(5), 727 (1985)

[10] Boch P, Chartier T, J. Am. Ceram. Soc., 74(10), 2248 (1991)

[11] Sacks MD, khadilkar CS, J. Am. Ceram. Soc., 66(7), 488 (1983)

[12] Fiori C, De Portu G, Novel Ceramic Fabrication Processes and Applications, pp. 213-215, Edited by Davidge RW, The Institute of Ceramics, Stoke-on-Trent, U. K. (1986) (1986)

[13] Boch P, Chartler T, Huttepain M, J. Am. Ceram. Soc., 69(8), C191 (1986)

[14] Chartier T, Besson JL, Science of Ceramics, Vol. 14, pp. 639-644, Edited by Taylor D, The Institute of Ceramics, Stoke-on-Trent, U.K., (1988) (1988)

[15] Barton AFM, CRC Handbook of Solubility Parameters and Other Cohesion Parameters, CRC Press, Boca Raton. FL. (1983) (1983)

[16] Shanefield DJ, Multilayer Ceramic Devices, pp. 155-160, edited by Blum JB, American Ceramic Society, Westerville, OH, (1986) (1986)

[17] Tormey ES, Pober RL, Bowen HK, Calvert PD, Forming of Cermaics, pp. 140-149, edited by Mangels JA, American Ceramic Society, Columbus, OH, (1984) (1984)

[18] De Kruif CG, Hydrodynamics of Dispersed Media, edited by Hulin JP, Cazabat AM, Guyon E, Carmona F, p. 79, Elsevier, North Holland, (1990) (1990)