1. CNR-ISTEC National Research Council of Italy, Institute of Science and Technology for Ceramics, Faenza, Italy + Polytechnic of Turin, Department of Applied Science and Technology, Torino, Italy
2. Polytechnic of Turin, Department of Applied Science and Technology, Torino, Italy
3. CNR-ISTEC National Research Council of Italy, Institute of Science and Technology for Ceramics, Faenza, Italy