MC35:MICROSTRUCTURE CHARACTERIZATION OF BST PREPARED BY LOW TEMPERATURE CHLORIDE AQUEOUS METHOD.

S. Srimala, F.M.N Ahmad*, A.A Zainal & O. Radzali

  • FMN Ahmad

Abstract

MC35:MICROSTRUCTURE CHARACTERIZATION OF BST PREPARED BY LOW TEMPERATURE CHLORIDE AQUEOUS METHOD.

  1. Srimala, F.M.N Ahmad*, A.A Zainal & O. Radzali

School of Materials & Mineral Resource Engineering, Universiti Sains Malaysia (Engineering Campus),

14300, Nibong Tebal, Seberang Perai Selatan, MALAYSIA

Barium Strontium Titanate (BST) powders were processed at temperature 80"C by reacting TiO2 sod in aqueous solutions that contained BaC12, SrCI, and NaOH at atmospheric pressure. The characteristic of BST powders and sintered pellet were studied using Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM) and X-ray Diffraction (XRD). Well-crystallized, spherical BST powders with size of 25 nm to 60 nm were formed by this method. As for sintered sample, the crystallite size determined using Scherrer equation was in the range of 200 nm to 324 nm (1300'C/10h). However, observation via SEM and TEM shows bimodal distribution of grain size. The fine grains was in the range of 300 nm to 500 nm whereas the large ones approximately 1.5 pm to 2.0 pm. This grain growth might be due to the Ti-rich phase. Furthermore, interesting features such as conventional domain and fringes was observed in the sintered sample. The elaboration of this observation is described in detail in this paper.

* Corresponding author: Email: afauzi@eng.usm.my

Published
2015-12-01
Section
Original Research Articles