Dielectric properties of crystalline binary KN[O.sub.3]-AgN[O.sub.3] mixtures embedded in nanoporous silicate matrices

The results of dielectric studies of MCM-41 silicate matrices with cellular pores (37.0 and 26.1 A in diameter) filled by binary mixtures of [K.sub.1-x][Ag.sub.x]N[O.sub.3] (x = 0, 0.05, 0.10) are reported in comparison with those obtained for bulk salts of the same composition in the temperature ra...

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Bibliographic Details
Published inPhysics of the solid state Vol. 52; no. 2; pp. 392 - 396
Main Authors Baryshnikov, S.V, Charnaya, E.V, Milinskii, A. Yu, Stukova, E.V, Tien, Cheng, Michel, D
Format Journal Article
LanguageEnglish
Published Springer 01.02.2010
Subjects
Analysis
Dielectrics
Electric properties
Electrical conductivity
Nanotechnology
Silicates
Toy industry
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Summary:The results of dielectric studies of MCM-41 silicate matrices with cellular pores (37.0 and 26.1 A in diameter) filled by binary mixtures of [K.sub.1-x][Ag.sub.x]N[O.sub.3] (x = 0, 0.05, 0.10) are reported in comparison with those obtained for bulk salts of the same composition in the temperature range of structural phase transitions. It has been revealed that, upon heating, the nanocomposites undergo transitions from crystal modification II to phase I, as in bulk KN[O.sub.3], whereas the bulk mixtures with x = 0.05 and 0.10 have a complex structure in accordance with the phase diagram. It has been shown that embedding binary salts and pure potassium nitrate in pores with a diameter of 26.1 Å results in the formation of an intermediate ferroelectric phase upon cooling. The permittivity and electrical conductivity are found to increase with increasing AgN[O.sub.3] concentration in bulk samples, as well as with decreasing pore size in the nanocomposites for all values of x.
ISSN:1063-7834
1090-6460
DOI:10.1134/S1063783410020277