Title

Synthesis And Characterization Of Nanocrystalline Barium Strontium Titanate Powder Via Sol-Gel Processing

Keywords

Barium strontium titanate; Nano-electroceramics; Nanopowder-synthesis; Sintering; Sol-gel

Abstract

Barium Strontium Titanate (BST) solid solution is a strong candidate material for application in tunable ferroelectric devices. In this research, we have synthesized and characterized nanocrystalline BST (Ba0.7Sr 0.3TiO3) powder with average particle-diameter of 15 nm through a simple sol-gel process, using barium acetate, strontium acetate and titanium isopropoxide as the precursors. In this process, stoichiometric proportions of barium acetate and strontium acetate were dissolved in acetic acid followed by refluxing, and addition of titanium (IV) isopropoxide to form BST gel. The gel was analyzed using Differential Scanning Calorimetry (DSC) and Thermal Gravimetric Analysis (TGA). The as-formed gel was dried at 200 °C and then calcined in the temperature range of 400 to 800 °C for crystallization. Phase evolution during calcination was studied using X-ray diffraction (XRD) technique. Particle size, morphology and the lattice fringes of the calcined powder were characterized by high-resolution transmission electron microscopy (HR-TEM). To study the effects of sintering on BST nanopowder, green ceramic specimens were prepared by uniaxial compaction and then sintered at 950-1,100 °C under atmospheric conditions. Sintered specimens were analyzed for phase composition, grain size and geometric bulk density. © Springer Science+Business Media, LLC 2007.

Publication Date

4-1-2007

Publication Title

Journal of Electroceramics

Volume

18

Issue

1-2

Number of Pages

57-65

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1007/s10832-007-9008-7

Socpus ID

34247380603 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/34247380603

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