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A novel approach for identifying and synthesizing highdielectric materials

Published online by Cambridge University Press:  31 January 2011

J.-H. Park
Affiliation:
CHiPR, Department of Chemistry, State University of New York, Stony Brook, New York 11794–2100
J. B. Parise
Affiliation:
CHiPR, Department of Geosciences, State University of New York, Stony Brook, New York 11794–2100
P. M. Woodward
Affiliation:
Department of Chemistry, The Ohio State University, Columbus, Ohio 43210–1185
I. Lubomirsky
Affiliation:
Department of Electrical Engineering (IV), University of California, Los Angeles, California 90024
O. Stafsudd
Affiliation:
Department of Electrical Engineering (IV), University of California, Los Angeles, California 90024
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Abstract

Modern telecommunications require materials with high dielectric constants (κ). The number of suitable elements ultimately limits one approach to the discovery of new materials, targeting compositions with high atomic polarizabilities (α). By decreasing the molar volume of compositions with high α, however, we anticipated dramatic increases in κ and demonstrated that this approach works. The quenched high-pressure perovskite polymorph of Na2MTeO6 (M = Ti, Sn) showed a twofold increase in κ, compared to the ilmenite form. This result suggested the highest values of κ occur for compositions with high α, which form quenchable compounds at high pressures and temperatures.

Type
Articles
Copyright
Copyright © Materials Research Society 1999

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