Browse > Article

Dispersion stability of ultra-fine $BaTiO_3$ suspensions in aqueous medium  

Chun, M.P. (Advanced Materials and Components Lab., Korea institute of Ceramic Engineering and Technology)
Chung, Y.B. (Advanced Materials and Components Lab., Korea institute of Ceramic Engineering and Technology)
Ma, Y.J. (Advanced Materials and Components Lab., Korea institute of Ceramic Engineering and Technology)
Cho, J.H. (Advanced Materials and Components Lab., Korea institute of Ceramic Engineering and Technology)
Kim, B.I. (Advanced Materials and Components Lab., Korea institute of Ceramic Engineering and Technology)
Publication Information
Journal of the Korean Crystal Growth and Crystal Technology / v.15, no.6, 2005 , pp. 239-243 More about this Journal
Abstract
The effect of pH and particle size on the dispersion stability of ultra-fine $BaTiO_3$ suspensions in aqueous medium have been investigated by means of zeta potential, sediment experiments, and powder properties (particle analysis, specific surface area) etc. Zeta potential as a function of pH for two particles of different size increases from -75 to +10 mV with decreasing pH from 8.5 to 1.4. The curve of zeta potential for small particle (150 nm) has slow slope than that of large particle (900nm), giving IEP (isoelectric point) value of pH=1.6 for small particle and pH=1.9 for large particle respectively, which means that it is more difficult to control zeta potential with pH fur small particle than large particle. The dispersion stability of $BaTiO_3$ particles in aqueous medium was found to be strongly related with the agglomeration of colloidal suspensions with time through the sedimentation behaviors of colloidal particles with time and pH value.
Keywords
$BaTiO_3$; Dispersion; Suspension; Zeta potential; Sedimentation; IEP;
Citations & Related Records
연도 인용수 순위
  • Reference
1 D. Hennings, C. Metzmacher and B. Schreinemacher, 'Defect chemistry and microstructure of hydrothermal barium titanate', J. Am. Ceram. Soc. 84 (2001) 179   DOI   ScienceOn
2 U. Paik, V. Hackley, S. Choi and Y. Jung, 'The effect of electrostatic repulsive forces on the stability of $BaTiO_3$ partrcles suspended in non-aqueous media', Coll. Surf. A 135 (1998) 77
3 D. Liu, 'Rheology of aqueous suspensions containing highly concentrated nano-sized zirconia powders', J. Mater. Sci. Lett. 17 (1998) 1883
4 W.J. Tseng and C. Lin, 'Effect of dispersants on rheological behavior of $BaTiO_3$ powders in ethanol-isopropanol mixtures', Mater. Chem. Phys. 80 (2003) 232
5 W.J. Tseng, 'Rheology of colloidal $BaTiO_3$ suspension with ammonium polyacrylate as a dispersant', S. Li, Mater. Sci. Eng. A 333 (2002) 314   DOI   ScienceOn
6 X. Wang, B. Lee and L. Mann, 'Dispersion of barium titanate with polyaspartic acid in aqueous media', Coll. Surf. A 202 (2002) 71   DOI   ScienceOn
7 B. Lee, 'Chemical variation in barium titanate powders and dispersants', J. Electroceram. 3 (1999) 53   DOI   ScienceOn
8 J. Zhao, X. Wang, Z. Gui and L. Li, 'Dispersion of barium titanate with poly(acrylic acid-co-maleic acid) in aqueous media', Ceram. Int. 30 (2004) 1985   DOI   ScienceOn
9 M. Buscaglia, V. Buscaglia, M. Viviani, P. Nanni and M. Hanuskova, 'Influence of foreign ions on the crystal structure of $BaTiO_3$', J. Eur. Ceram. Soc. 20 (2000) 1997   DOI   ScienceOn
10 O. Mengual, G. Meunier, I. Cayre, K. Puech and P. Snabre, 'Characterization of instability of concentrated dispersions by a new optical analyzer: the Turbiscan MA 1000', Coll. Surf. A 152 (1999) 111   DOI   ScienceOn
11 C. Chauvierre, D. Labarre, P. Couvreur and C. Vauthier, 'A new approach for the characterization of insoluble amphiphilic copolymers based on their emulsifying properties', Coll. Polym. Sci. 282 (2004) 1097   DOI   ScienceOn
12 Z. Shen, J. Chen, H. Zou and J. Yun, 'Dispersion of nanosized aqueous suspensions of barium titanate with ammonium polyacrylate', J. Coll. Int. Sci. 275 (2004) 158   DOI   ScienceOn
13 Z. Chen, T. Ring and J. Lemaitre, 'Stabilization and processing of aqueous BaTiO3 suspension with polyacrylic acid', J. Am. Ceram. Soc. 75 (1992) 3201   DOI
14 D. Kim, J. Yeo, Y. Jung, S. Choi and U. Paik, 'Suspension stability and consolidation behavior of ultrafine $BaTiO_3$ particles in nonazeotropic solvent system', Mater. Chem. Phys. 82 (2003) 181   DOI   ScienceOn
15 M.C. Blanco Lopez, B. Rand and F.L. Riley, 'The properties of aqueous phase suspensions of barium titanate', J. Euro. Ceram. Soc. 17 (1997) 281   DOI   ScienceOn
16 W.S. Cho and E. Hamada, 'Synthesis of ultrafine $BaTiO_3$ particles from polymeric precursor: their structure and surface property', J. Alloys and Compounds 266 (1998) 118   DOI   ScienceOn
17 W. Luan and L. Gao, 'Influence of pH value on properties of nanocrystalline $BaTiO_3$ powder', Ceram. Int. 27 (2001) 645   DOI   ScienceOn
18 G. Carlos, B. Heberto and M. Froylan, 'Colloidal processing of $BaTiO_3$ using ammonium polyacrylate as dispersant', Ceram. Int. 26 (2000) 609   DOI   ScienceOn
19 J.H. Jean and H.R. Wang, 'Dispersion of aqueous barium titanate suspensions with ammonium salt of poly(methacrylic acid)', J. Am. Ceram. Soc. 81 (1998) 1589   DOI   ScienceOn