Stabilized dielectric barium titanate dispersions for sensor filling
- Resolution of special capacitive sensors can be improved enormously by replacement of the gaseous material between the capacitor plates by a ceramic dispersion with high permittivity. High dielectric liquid dispersions of ceramic submicron and nano barium titanate powders should be qualified as dielectric fluid with long-term shelf life for this use. Investigations for the production of stabilized barium titanate dispersions in aqueous and organic liquids by use of different dispersant aids were performed. Characterization of dispersed particles and agglomerates was done by use of zeta potential measurements for aqueous dispersions as well as particle sizing by laser diffraction, ultrasound spectroscopy and dynamic light scattering for aqueous and organic dispersions. Optimization of stability was evaluated by accelerated sedimentation measurements with an optical centrifuge. Best results were achieved for barium titanate dispersions in silicone oil.
Autor*innen: | Marion Gemeinert, Gabriele Steinborn |
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Koautor*innen: | Patrick Höhne, Franziska Lindemann, Wolfram SchmidtORCiD |
Dokumenttyp: | Posterpräsentation |
Veröffentlichungsform: | Präsentation |
Sprache: | Englisch |
Jahr der Erstveröffentlichung: | 2016 |
DDC-Klassifikation: | Naturwissenschaften und Mathematik / Chemie / Analytische Chemie |
Freie Schlagwörter: | Barium titanate nanopowder; Particle size analysis; Stabilized dispersions |
Veranstaltung: | 91. Jahrestagung der deutschen keramischen Gesellschaft |
Veranstaltungsort: | Freiberg, Germany |
Beginndatum der Veranstaltung: | 07.03.2016 |
Enddatum der Veranstaltung: | 09.03.2016 |
Verfügbarkeit des Dokuments: | Datei im Netzwerk der BAM verfügbar ("Closed Access") |
Datum der Freischaltung: | 31.03.2016 |
Referierte Publikation: | Nein |