1. Dipartimento di Ingegneria Industriale; University of Padova; Padova Italy
2. Ceramics Department; National Research Centre; Cairo Egypt
3. Vitreous Materials Laboratory; Department of Materials Engineering; Center for Research, Education and Technology in Vitreous Materials (CeRTEV); Federal University of São Carlos (UFSCar); São Carlos São Paulo Brazil
4. Department of Materials Science and Engineering; The Pennsylvania State University; University Park Pennsylvania USA