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Characterization of relationship between particle size and powder properties for $BaTiO_3$  

Chun, M.P. (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. 244-251 More about this Journal
Abstract
The relationship between particle size of hydro-thermally synthesized barium titanate powders (BT01, BT02, BT03, BT04, BT05) and the powder properties was investigated by means of particle size, specific surface area, zeta potential, XPS, XRD and SEM. Particle size determined by laser light scattering is closely related with specific surface area and the tetragonality (c/a) obtained from XRD. The specific surface area of the samples inversely decreased with increasing particle size except BT03 powder. BT03 sample showed higher surface area than BT04 sample of equivalent particle size, which was attributed mostly to the agglomeration of particles in terms of SEM image and XRD analysis. Zeta potential increased with increasing particle size with the exception of BT02 and BT03 which showed larger minus value of zeta potential in comparison with other BT powders. Beta potential results of BT02 and BT03 are considered to be related with the dissolution of $Ba^{2+}$ ion in these powers which was examined by XPS.
Keywords
Barium titanate; Particle size; Specific surface area; Zeta potential; XPS; XRD; Agglomeration;
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