TY - JOUR A1 - Wäsche, Rolf A1 - Abe, H. A1 - Naito, M. A1 - Hackley, V. A1 - Hotta, Y. T1 - Influence of particle size and solid loading on the determination of the isoelectric point (IEP) of ceramics powders by different methods JF - Key engineering materials N2 - The isoelectric point is a material property for the characterization of acid-base behavior of the powder surface. The IEP of two alumina powders (AKP-30, Grade A) with different particle size characteristics in aqueous suspension has been determined by colloid vibration current (CVI) and particle charge detection (PCD) methods in moderately concentrated suspensions in order to qualify these methods for a future standardization. The solid loading of the suspensions were 1 and 5 vol%. The comparison of the IEP determined by PCD and CVI was in good agreement. However, the solid loading dependence of IEP and a large IEP hysteresis (at 1 vol%) were observed, which do not allow a proper determination of the IEP. The recording of the potential curve and therfore the determination of the IEP with CVI was difficult for the suspension of Grade A powder due to formation of agglomerates at pH values near the pHIEP. T2 - 7th Euro Ceramics - Conference and Exhibition of the European Ceramic Society (ECerS) CY - Brugge, Belgium DA - 2001-09-09 KW - Isoelectric point (IEP) KW - Alumina powder KW - Particle charge detection (PCD) KW - Colloid vibration current (CVI) PY - 2002 UR - http://ois.nist.gov/nistpubs/technipubs/recent/search.cfm?dbibid=9289 DO - https://doi.org/10.4028/www.scientific.net/KEM.206-213.3 SN - 1013-9826 VL - 206-213 SP - 3 EP - 6 PB - Trans Tech Publ. CY - Aedermannsdorf AN - OPUS4-1437 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Hackley, V.A. A1 - Patton, J. A1 - Lum, L.-S. H. A1 - Wäsche, Rolf A1 - Naito, M. A1 - Abe, H. A1 - Hotta, Y. A1 - Pendse, H. T1 - Analysis of the isoelectric point in moderately concentrated Alumina suspensions using electroacoustic and streaming potential methods JF - Journal of dispersion science and technology PY - 2002 SN - 0193-2691 SN - 1532-2351 VL - 23 IS - 5 SP - 601 EP - 617 PB - Dekker CY - New York, NY AN - OPUS4-2080 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -