Piezoelectric and Dielectric Properties of Ceramics in the System Potassium—Sodium Niobate

摘要: High radial coupling coefficients are observed for compositions having up to 50 mole% sodium niobate additions to potassium niobate. The activity diminishes with additional sodium niobate content and disappears beyond about 98 mole% additions. Dielectric constants are relatively low, varying from 450 to 125, depending on composition. A.‐c. losses are high and d.‐c. resistivities are∼ 1012ohm‐cm. The low dielectric constants and high coupling obtained in certain regions of the system make these materials promising for …