Title :
Stability of suspensions of ferroelectric BaTiO3 particles in hydrocarbon carrier liquids
Author :
Muller, J.-U. ; Abendroth, J. ; Bärner, K.
Author_Institution :
Phys. Inst., Goettingen Univ., Germany
Abstract :
The stability of suspensions of ferroelectric (BaTiO3) nm-particles, using heptane as carrier liquid and oleic acid as stabilizer, is investigated by means of electrooptic Kerr rotation and optical transmittance. On suspension up to 0.006 solid volume fraction, with permanent dipole moments existing at 5 nm<r<20 nm (14 mC/cm2 at 20 nm), 10-90% reversible changes in the transmittance were observed while the Kerr rotation was apparently unaffected. This can be explained by a field-induced reversible agglomeration of about 5% of the particles. Irreversible agglomeration is also observed for high solid volume fractions and low stabilizer content
Keywords :
Kerr electro-optical effect; barium compounds; ferroelectric materials; stability; suspensions; titanium compounds; electrooptic Kerr rotation; ferroelectric BaTiO3 particles; field-induced reversible agglomeration; heptane; hydrocarbon carrier liquids; oleic acid; optical transmittance; stability; suspensions; Electrodes; Ferroelectric materials; Hydrocarbons; Liquids; Marketing and sales; Milling; Polarization; Solids; Stability; Suspensions;
Conference_Titel :
Conduction and Breakdown in Dielectric Liquids, 1990. ICDL 1990. Conference Record., 10th International Conference on
Conference_Location :
Grenoble
DOI :
10.1109/ICDL.1990.202945
