Structure and dielectric behaviour of Sr-modified Bi4Si3O12 thin films prepared via sol gel method

Authorsعباس صادق زاده عطار,سعید حاجی جعفری بیدگلی,محمدرضا بافنده
JournalProcessing and Application of Ceramics
Page number36
Volume number12
IF1.07
Paper TypeFull Paper
Published At2018-03-11
Journal GradeScientific - research
Journal TypeElectronic
Journal CountryIran, Islamic Republic Of
Journal IndexISI ,SCOPUS

Abstract

Bismuth silicate (Bi4Si3O12, BSO) nanostructured films containing 0, 1, 2, and 3mol% Sr were prepared vi sol-gel method and annealed at different temperatures up to 700 °C. The effects of Sr content on the structure and morphology of prepared films were investigated. SEM images showed that surfaces of the prepared films were dense, smooth and homogeneous. The average particle size was changed from 30 to 35 nm as the annealing temperature was increased from 500 to 700 °C. Variation of the dielectric constant and dielectric loss as a function of frequency and annealing temperature for the synthesized thin films with different content of Sr were also studied. The dielectric constant and dielectric loss decrease with Sr addition, and reach the minimum for the sample containing 2mol% Sr. These changes could be attributed to the crystal structure and formation of secondary phases.

tags: Sr-doped Bi4Si3O12, thin films, sol-gel process, structural characterization, dielectric properties