Abstract
The effects of the impurity on the rheological behavior of the aqueous slip and the resulting sintering properties of low-soda easy-sintered alumina were examined. The addition of Na+, Ca2+, Mg2+, Fe3+, and Si4+ resulted in a change in slip viscosity, where Na+ and Mg2+ increased the viscosity significantly. On the other hand, the changes in the zeta potential of the particles upon impurity addition were insignificant. The addition of Mg2+ and Fe3+ revealed a denser sintered microstructure along with more uniform grain sizes, whereas Na+, Ca2+, and Si4+ addition resulted in a lower sintered density and abnormal grain growth compared to those of the as-received powder. Overall, the impurity affected the slip viscosity and sintered microstructure of alumina significantly, while the color difference of sintered sample existed in two kinds of powders was difficult to explain only using the type and content of impurities.
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References
A. Moradkhani, H. Baharvandi, A. Naserifar, Effect of sintering temperature on the grain size and mechanical properties of Al2O3-SiC nanocomposites. J. Korean Ceram. Soc. 56, 256–268 (2019). https://doi.org/10.4191/kcers.2019.56.3.01
A. Fathi, H. Baharvandi, Effect of heat-treatment temperature on mechanical properties and microstructure of alumina–SiC nanocomposite. J. Korean Ceram. Soc. 57, 503–512 (2020). https://doi.org/10.1007/s43207-020-00052-x
A.M. Abyzov, N.A. Khristyuk, V.V. Kozlov, F.M. Shakhov, Alumina ceramics doped with manganese titanate via applying Mn–Ti–O coatings to corundum micropowder. J. Korean Ceram. Soc. 57, 692–707 (2020). https://doi.org/10.1007/s43207-020-00076-3
Y.M. Byun, G.W. Lee, K.S. Lee, J.G. Park, I.J. Kim, Effect of sintering temperature on the grain size and mechanical properties of Al2O3-SiC nanocomposites. J. Korean Ceram. Soc. 58, 269–275 (2021). https://doi.org/10.1007/s43207-020-00105-1
C.Y. Lee, S. Lee, J.H. Ha, J. Le, I.H. Song, K.S. Moon, Effect of sintering temperature on the grain size and mechanical properties of Al2O3-SiC nanocomposites. J. Korean Ceram. Soc. 58, 495–506 (2021). https://doi.org/10.1007/s43207-021-00128-2
M. Garside, Global alumina production volume 2010–2020, Statita (2021), https://www.statista.com/statistics/799525/global-alumina-production. Accessed 20 Oct 2021
C. Venkatesh, R. Nerella, M.S.R. Chand, Experimental investigation of strength, durability, and microstructure of red-mud concrete. J. Korean Ceram. Soc. 57, 167–174 (2020). https://doi.org/10.1007/s43207-019-00014-y
M.H. Zahir, T. Nagano, M.M. Rahman, K. Alhooshanie, S. Chowdhury, M.A. Aziz, Microstructural investigations of tubular α-Al2O3 supported γ-Al2O3 membranes and their hydrothermal improvement. J. Eur. Ceram. Soc. 37, 2637–2647 (2017). https://doi.org/10.1016/j.jeurceramsoc.2017.02.036
S. Wang, X. Li, S. Wang, Y. Li, Y. Zhai, Synthesis of γ-alumina via precipitation in ethanol. Mater. Lett. 62, 3552–3554 (2008). https://doi.org/10.1016/j.matlet.2008.03.048
H. Guo, W. Li, Effects of Al2O3 crystal types on morphologies, formation mechanisms of mullite and properties of porous mullite ceramics based on kyanite. J. Eur. Ceram. Soc. 38, 679–686 (2018). https://doi.org/10.1016/j.jeurceramsoc.2017.09.003
A.R. Hind, S.K. Bahrgava, S.C. Grocott, The surface chemistry of Bayer process solids: a reviews. Colloids Surf. A Physicochem. Eng. Aspects 146, 359–374 (1999). https://doi.org/10.1016/S0927-7757(98)00798-5
P. Mikkola, P. Ylha, E. Levanen, J.B. Rosenholm, Effect of impurities on dispersion properties of alpha-alumina powder. Ceram. Int. 30, 291–299 (2004). https://doi.org/10.1016/S0272-8842(03)00102-0
N. Louet, M. Gonon, G. Fantozzi, Influence of the amount of Na2O and SiO2 on the sintering behavior and on the microstructural evolution of a Bayer alumina powder. Ceram. Int. 31, 981–987 (2005). https://doi.org/10.1016/j.ceramint.2004.10.013
S.C. Park, D.W. Kim, I.W. Heo, S.J. Lee, De-soda process using silica for fabrication of low soda alumina powder. J. Korean Ceram. Soc. 52, 192–196 (2015). https://doi.org/10.4191/kcers.2015.52.3.192
D.S. Suh, J.H. Cho, Investigation of the purification process of alumina by the volatilization method. Korean Inst. Chem. Eng. 33, 367–375 (1995)
Y.Y. Park, S.O. Lee, T. Tran, S.J. Kim, M.J. Kim, A study on the preparation of fine and low soda alumina. Int. J. Miner. Proc. 80, 126–132 (2006). https://doi.org/10.1016/j.minpro.2006.03.006
T. Shirai, H. Watanabe, M. Fuji, M. Takahashi, Structural properties and surface characteristics on aluminum oxide powders. Nogoya Inst. Technol. Repos. Syst. 9, 23–31 (2009)
K.A. Evans, The manufacture of alumina and its use in ceramics and related applications. Key Eng. Mater. 489, 122–124 (1996)
B.E. Yoldas, Hydrolysis of aluminum alkoxides and bayerite conversion. J. Appl. Chem. Biotech. 23, 803–809 (1973). https://doi.org/10.1002/jctb.5020231103
H. Kadokura, H. Umezaki, Y. Higuchi, Process for producing high purity metallic compound, US Patent No. 4650895 (1987). https://patents.google.com/patent/US4650895A/en
P. Wong, M. Robinson, Chemical vapor deposition of polycrystalline Al2O3. J. Am. Ceram. Soc. 53, 617–621 (1970). https://doi.org/10.1111/j.1151-2916.1970.tb15985.x
D.M. Kim, K.B. Kim, S.Y. Yoon, Y.S. Oh, H.T. Kim, S.M. Lee, Effects of artificial pores and purity on the erosion behaviors of polycrystalline Al2O3 ceramics under fluorine plasma. J. Ceram. Soc. Jpn. 117, 863–867 (2009). https://doi.org/10.2109/jcersj2.117.863
D.M. Kim, S.M. Lee, S.W. Kim, H.T. Kim, Y.S. Oh, Microstructural changes of the Al2O3 ceramics during the exposure to fluorine plasma. J. Korean Ceram. Soc. 45, 405–410 (2008). https://doi.org/10.4191/KCERS.2008.45.7.405
Chem Consulting Report, Status of ceramic raw materials and policy for industrial promotion (in Korean), CMRI (2019)
S.I. Bae, S. Baik, Critical concentration of MgO for the prevention of abnormal grain growth in alumina. J. Am. Ceram. Soc. 77, 2499–2504 (1994). https://doi.org/10.1111/j.1151-2916.1994.tb04634.x
C.A. Handwerker, P.A. Morris, R.L. Coble, Effects of chemical inhomogeneities on grain growth and microstructure in Al2O3. J. Am. Ceram. Soc. 72, 130–136 (1989). https://doi.org/10.1111/j.1151-2916.1989.tb05965.x
G. Tari, J.M.F. Ferreira, O. Lyckfeldt, Influence of magnesia on colloidal processing of alumina. J. Eur. Ceram. Soc. 17, 1341–1350 (1997). https://doi.org/10.1016/S0955-2219(96)00243-9
J. Kiennemann, C. Pagnoux, T. Chartier, J.F. Baumard, Influence of impurities on dispersion properties of Bayer alumina. J. Am. Ceram. Soc. 87, 2175–2182 (2004). https://doi.org/10.1111/j.1151-2916.2004.tb07487.x
S. Sumita, H.K. Bowen, Effects of foreign oxides on grain growth and densification of sintered Al2O3, in Ceramic transactions 21, ceramics powder science II. ed. by P.A. Pask, A.G. Evans (Plenum Publishers, New York, 1988), pp. 840–847
Y. Takao, T. Hotta, M. Naito, N. Shinohara, M. Okumiya, K. Uematsu, Microstructure of alumina compact body made by slip casting. J. Eur. Ceram. Soc. 22, 397–401 (2002). https://doi.org/10.1016/S0955-2219(01)00307-7
S.M. Olhero, J.M.F. Ferreira, Particle segregation phenomena occurring during the slip casting process. Ceram. Int. 28, 377–386 (2002). https://doi.org/10.1016/S0272-8842(01)00105-5
T. Hotta, H. Abe, M. Naito, M. Takahashi, K. Uematsu, Z. Kato, Effect of coarse particle on the strength of alumina made by slip casting. Powder Technol. 149, 106–111 (2005). https://doi.org/10.1016/j.powtec.2004.11.004
J.F. Kelso, T.A. Ferrazzoli, Effect of powder surface chemistry on the stability of concentrated aqueous dispersion of alumina. J. Am. Ceram. Soc. 72, 625–627 (1989). https://doi.org/10.1111/j.1151-2916.1989.tb06185.x
C.R. Evanko, R.F. Delisio, D.A. Dzombak, J.W. Novak, Influence of aqueous chemistry on the surface charge, viscosity and stability of concentrated alumina dispersions in water. Colloids Surf. A Physicochem. Eng. Aspects 125, 95–107 (1997). https://doi.org/10.1016/S0927-7757(96)03874-5
B.J. Briscoe, A.U. Kahn, P.F. Luckhan, Optimising the dispersion on an alumina suspension using commercial polyvalent electrolyte dispersants. J. Eur. Ceram. Soc. 18, 2141–2147 (1999). https://doi.org/10.1016/S0955-2219(98)00147-2
J. Davies, J.G.P. Binner, The role of ammonium polyacrylate in dispersing concentrated alumina suspensions. J. Eur. Ceram. Soc. 20, 1539–1553 (2000). https://doi.org/10.1016/S0955-2219(00)00012-1
J. Cesarano, I.A. Aksay, A. Bleier, Stability of aqueous α-alumina suspensions with poly(methacrylic acid) polyelectrolyte. J. Am. Ceram. Soc. 71, 250–255 (1988). https://doi.org/10.1111/j.1151-2916.1988.tb05792.x
B.P. Singh, R. Menchavez, C. Takai, M. Fuji, M. Takahashi, Stability of dispersions of colloidal particles in aqueous suspension. J. Colloid Interf. Sci. 291, 181–186 (2005). https://doi.org/10.1016/j.jcis.2005.04.091
A. Sakthisabarimoorthi, M.J. Kang, D.H. Yoon, Modification of a low-soda easy-sintered α-Al2O3 powder for the application in semiconductor/display production equipment. Korean J. Chem. Eng. 38, 2541–2548 (2021). https://doi.org/10.1007/s11814-021-0915-0
Acknowledgements
This study was supported by the i-Ceramic Manufacturing Innovation Program (20003891) and the Technology Innovation Program (20012911) funded by the Korean Ministry of Trade, Industry & Energy. The authors thank the Core Research Support Center for Natural Products and Medical Materials (CRCNM) for technical support regarding surface area measurement. The authors also gratefully acknowledge Dr. A. Sakthisabarimoorthi for performing washing of Al2O3 powder and helpful discussion.
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Kang, M.J., Yoon, DH. Effects of impurities on the slip viscosity and sintered properties of low-soda easy-sintered α-alumina. J. Korean Ceram. Soc. 59, 595–603 (2022). https://doi.org/10.1007/s43207-022-00192-2
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DOI: https://doi.org/10.1007/s43207-022-00192-2