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Title: Percolative properties in ferroelectric-dielectric composite ceramics
Authors: Zhang, Q.
Zhai, J.
Kong, L. 
Yao, X.
Issue Date: 1-Nov-2010
Citation: Zhang, Q., Zhai, J., Kong, L., Yao, X. (2010-11-01). Percolative properties in ferroelectric-dielectric composite ceramics. Applied Physics Letters 97 (18) : -. ScholarBank@NUS Repository.
Abstract: Percolative properties in dielectric (DE) tunability were observed in three ferroelectric (FE)-DE composite ceramics as follows: xBa0.5 Sr 0.5 TiO3 -MgO, xBa0.4 Sr0.6 TiO 3 - Mg2 TiO4, and xBa0.5 Sr0 .5 TiO3 - Mg3 B2 O6. Dielectric constants of the composites increased monotonously with increasing volume fractions of FE component. Comparatively, their DE tunabilities exhibited a weak dependence on FE concentrations over a wide range. However, their tunabilities started to decrease substantially below a critical concentration of FE. The critical concentrations were 40 vol % for Ba0.5 Sr 0.5 TiO3 -MgO, 38 vol % for Ba0.4 Sr 0.6 TiO3 - Mg2 TiO4, and 33 vol % for Ba0.5 Sr0.5 TiO3 - Mg3 B 2 O6. These results could be used as a guide to tailor the properties of FE-DE composites for tunable device applications. © 2010 American Institute of Physics.
Source Title: Applied Physics Letters
ISSN: 00036951
DOI: 10.1063/1.3514246
Appears in Collections:Staff Publications

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