Title :
Ferroelectric sodium-potassium-niobium silicate glass-ceramics
Author :
Vernacotola, D.E. ; Chatlani, S. ; Shelby, J.E.
Author_Institution :
New York State Coll. of Ceramics, Alfred Univ., NY, USA
Abstract :
Potassium niobate has been formed in potassium-niobium-silicate glasses containing ⩽36 mol% silica. Solid solutions of (K/Na)NbO3 have been obtained in heat treated sodium-potassium-niobium-silicate glasses containing 24 mol% silica. Although the dielectric constant of these glasses is strongly temperature dependent, it is probable that the dielectric behavior is due to the presence of residual glass and not the result of the presence of ferroelectric crystals. The glass-ceramics also contain a number of other, non-ferroelectric phases
Keywords :
ferroelectric ceramics; glass ceramics; heat treatment; niobium compounds; permittivity; potassium compounds; sodium compounds; solid solutions; (K/Na)NbO3 solid solution; (KNa)NbO3; KNbO3; Na2O-K2O-Nb2O5-SiO 2; dielectric constant; ferroelectric properties; heat treatment; potassium niobate; sodium-potassium-niobium silicate glass-ceramic; temperature dependence; Crystallization; Crystals; Dielectric constant; Ferroelectric materials; Glass; Grain boundaries; Niobium compounds; Optical materials; Silicon compounds; Temperature;
Conference_Titel :
Applications of Ferroelectrics, 2000. ISAF 2000. Proceedings of the 2000 12th IEEE International Symposium on
Conference_Location :
Honolulu, HI
Print_ISBN :
0-7803-5940-2
DOI :
10.1109/ISAF.2000.942446
