Open AccessCharacterization of Ba0.35Sr0.65TiO3 Made by Sol-Gel Method with X-Ray Powder Diffraction, Field Emission Scanning Electron Microscopy and Impedance Spectroscopy in Capacitor Application
Author(s) -
Rahmi Dewi
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/546/4/042006
Subject(s) - materials science , analytical chemistry (journal) , thin film , dielectric , scanning electron microscope , strontium titanate , ferroelectricity , lattice constant , sol gel , calcium titanate , diffraction , x ray crystallography , field emission microscopy , optics , nanotechnology , chemistry , optoelectronics , composite material , physics , chromatography
A thin film of Barium Strontium Titanate (BST) of ferroelectric material of Ba 0.35 Sr 0.65 TiO 3 has been made using sol-gel method and annealed at 600, 650, and 700°C in order to obtain its crystalline structure. This thin film was characterized using X-Ray Diffraction (XRD), Field Emission Scanning Electron Microscopy (FESEM) and Impedance Spectroscopy. The results of XRD characterization show a graph of intensity against angle 2θ. The XRD patterns of Ba 0.35 Sr 0.65 TiO 3 have many peaks and confirmed that the material of Ba 0.35 Sr 0.65 TiO 3 has cubic crystalline structure and their lattice parameter is in average of 2.399Å. The results of FESEM characterization show that the thickness of thin films of Ba 0.35 Sr 0.65 TiO 3 at 600, 650, and 700°C were 21.21 nm, 34.61 nm and 39.08 nm, respectively. The values of capacitance at the frequency of 100 Hz with temperature of 600, 650, and 700°C are 4.84 x 10 −11 F, 5.24 x 10 −11 F and 5.61 x 10 −11 F, respectively. The dielectric constant of the thin films of BST at the frequency of 100 Hz with temperature of 600, 650, and 700°C are 5.47, 5.90 and 6.28, respectively. While the loss of dielectric values of the thin films of BST at 100 Hz with temperature of 600, 650, and 700°C are 0.03, 0.08 and 0.12, respectively. The result of characterization by Impedance Spectroscopy shows that the higher the frequency, the smaller complex capacitance, dielectric constant and dielectric loss. Generally, the higher annealed temperature, the higher complex capacitance and dielectric constant.