| About this Abstract |
| Meeting |
Materials Science & Technology 2012
|
| Symposium
|
MS&T'12 Poster Session
|
| Presentation Title |
B23: Sonochemical Methods for Ceria and Zirconia Colloid Synthesis |
| Author(s) |
Matthew T. Snider, Krenar Shqau, Hendrik Verweij |
| On-Site Speaker (Planned) |
Matthew T. Snider |
| Abstract Scope |
We have developed new water-based, sonochemical procedures for synthesizing stable colloids of pure and doped ceria as well as stabilized zirconia from nitrate precursors at room-temperature. The precursors are dissolved in water and agitated by ultrasonic horn while base and a small amount of dispersant are added. With this method, 100-200mL dispersions of 10wt% oxide have been produced within four hours, yielding particles of 10-20nm diameter. One of the advantages of the method is control of the doping level and dispersion solid load simply by dissolving appropriate precursor amounts in the first step. These water-based colloids are stable up to several months with very few additions for stabilization, and this makes them useful in a range of applications. The colloids have been used to dip- and spin-coat defect-free, 50-500nm membranes on organic (polysulfone) and inorganic (silicon or alumina) supports for water purification, gas separation and solid-oxide fuel cells. |
| Proceedings Inclusion? |
Definite: A CD-only volume |