A novel approach for identifying and synthesizing high dielectric materials

Modern telecommunications require materials with high dielectric constants (kappa). The number of suitable elements ultimately limits one approach to the discovery of new materials, targeting compositions with high atomic pol arizabilities (alpha). By decreasing the molar volume of compositions with high alpha, however, we anticipated dramatic increases in kappa and demonst rated that this approach works. The quenched high-pressure perovskite polym orph of Na2MTeO6 (M = Ti, Sn) showed a twofold increase in kappa, compared to the ilmenite form. This result suggested the highest values of kappa occ ur for compositions with high alpha, which form quenchable compounds at hig h pressures and temperatures.