1. Department of Chemical Engineering and Food Engineering
2. Federal University of Santa Catarina (UFSC)
3. Florianopolis 88010-970
4. Brazil
5. Ceramic Materials Engineering
6. University of Bayreuth
7. D-95440 Bayreuth
8. Germany
9. Department of Materials and Earth Sciences
10. Technical University of Darmstadt
11. Darmstadt D-64287