Dielectric properties of BiMg1/2Ti1/2O3 and BiMg1/2Zr1/2O3 perovskite ceramics with elimination of the contribution for direct current conductivity.

Authors :: Olekhnovich, N. M.
Pushkarev, A. V.
Radyush, Yu. V.
Source :: Journal of Applied Spectroscopy; Jul2009, Vol. 76 Issue 4, p518-522, 5p, 3 Graphs
Publication Year :: 2009
Abstract: A technique for analysis of the electric modulus spectrum of dielectric ceramics based on the elimination of the direct current conductivity (σ<subscript> dc</subscript>) contribution has been developed. Expressions are given for the real ( M′<subscript> ac</subscript>) and imaginary ( M′′<subscript> ac</subscript>) parts of the complex electrical modulus related only to the dielectric polarization and not containing the contribution of σ<subscript> dc</subscript>. The frequency dependence of M′′<subscript> ac</subscript> and the M′′<subscript> ac</subscript> – M′<subscript> ac</subscript> diagram for BiMg<subscript>1/2</subscript>Ti<subscript>1/2</subscript>O<subscript>3</subscript> and BiMg<subscript>1/2</subscript>Zr<subscript>1/2</subscript>O<subscript>3</subscript> perovskite ceramics are analyzed. [ABSTRACT FROM AUTHOR]

Subjects :: PEROVSKITE
POLARIZATION (Electricity)
ELECTRIC conductivity
DIRECT currents
PHYSICAL & theoretical chemistry

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