Trefalt, Gregor ; Benčan, Andreja ; Kamplet, Mitja ; Malič, Barbara ; Seo, Yo-Han ; Webber, Kyle G. (2014):
Evaluation of the homogeneity in Pb(Zr,Ti)O3–zirconia composites prepared by the hetero-agglomeration of precursors using the Voronoi-diagram approach.
In: Journal of the European Ceramic Society, 34 (3), pp. 669-675. ISSN 09552219,
[Article]
Abstract
Hetero-agglomeration of precursor particles was employed to achieve a homogeneous distribution of tetragonal zirconia (TZ) grains within a lead zirconate titanate (PZT) ceramic matrix. The surface charge of the zirconia particles in the aqueous suspension was modified by the addition of citric acid. At pH 5, the citric-acid-modified TZ particles were negatively charged, while the PZT particles were positively charged, which led to the agglomeration of the two types of particles. The homogeneity of the TZ distribution in the PZT–TZ ceramic composites prepared from the hetero-agglomerated particles was evaluated using Voronoi-diagram analyses. The results showed that the homogeneity of the composites prepared using the citric-acid-modified TZ particles was higher than in the case where the TZ particles were not modified. The curves for the crack-growth resistance were also determined in order to investigate the impact of particle homogeneity on the fracture behavior.
| Item Type: | Article |
|---|---|
| Erschienen: | 2014 |
| Creators: | Trefalt, Gregor ; Benčan, Andreja ; Kamplet, Mitja ; Malič, Barbara ; Seo, Yo-Han ; Webber, Kyle G. |
| Title: | Evaluation of the homogeneity in Pb(Zr,Ti)O3–zirconia composites prepared by the hetero-agglomeration of precursors using the Voronoi-diagram approach |
| Language: | English |
| Abstract: | Hetero-agglomeration of precursor particles was employed to achieve a homogeneous distribution of tetragonal zirconia (TZ) grains within a lead zirconate titanate (PZT) ceramic matrix. The surface charge of the zirconia particles in the aqueous suspension was modified by the addition of citric acid. At pH 5, the citric-acid-modified TZ particles were negatively charged, while the PZT particles were positively charged, which led to the agglomeration of the two types of particles. The homogeneity of the TZ distribution in the PZT–TZ ceramic composites prepared from the hetero-agglomerated particles was evaluated using Voronoi-diagram analyses. The results showed that the homogeneity of the composites prepared using the citric-acid-modified TZ particles was higher than in the case where the TZ particles were not modified. The curves for the crack-growth resistance were also determined in order to investigate the impact of particle homogeneity on the fracture behavior. |
| Journal or Publication Title: | Journal of the European Ceramic Society |
| Volume of the journal: | 34 |
| Issue Number: | 3 |
| Uncontrolled Keywords: | PZT; Colloidal suspension; Composites; Voronoi diagram; Mechanical properties |
| Divisions: | 11 Department of Materials and Earth Sciences 11 Department of Materials and Earth Sciences > Material Science 11 Department of Materials and Earth Sciences > Material Science > Elektromechanik von Oxiden 11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials |
| Date Deposited: | 24 Jan 2014 10:02 |
| URL / URN: | http://dx.doi.org/10.1016/j.jeurceramsoc.2013.09.014 |
| Identification Number: | doi:10.1016/j.jeurceramsoc.2013.09.014 |
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