Khalid R. Muhammed
Preparation and Properties of Sodium Potassium Niobate Glass-Ceramics
Khalid R. Muhammed*, Iasmi Sterianou and Paul A. Bingham
Materials and Engineering Research Institute, Sheffield Hallam University, City
Campus, Howard Street, Sheffield S1 1WB, UK
Sodium potassium niobate-based ceramics have long been used in electronic devices due to their desirable dielectric properties. In recent years they have received considerable attention in the quest for lead-free piezoelectric ceramics. Our aim is to prepare sodium potassium niobate glass ceramics using melt processing, which could reduce both the time and costs involved in manufacture, and also modify key properties of the material in comparison to the ceramics currently produced using classic solid state routes. Borosilicate glasses containing Na2O, K2O and Nb2O5 were prepared using melt processing and were subsequently heat treated to form glass-ceramics. Results and conclusions based on density measurements, Raman, XRD, DTA, SEM-EDS and electrical property analysis will be presented.
Keywords: Sodium potassium niobate; glass ceramic; melt processing; heat treatment.