1. Department of Industrial Chemistry “Toso Montanari”
2. University of Bologna
3. I-40136 Bologna
4. Italy
5. Department of Chemical and Pharmaceutical Sciences
6. University of Ferrara
7. I-44121 Ferrara
8. Institute of Science and Technology for Ceramics
9. National Council of Research
10. ISTEC-CNR
11. I-48018 Faenza