Variation of Strontium (Sr) in the Ferroelectric Material Barium Strontium Titanate (Ba1-xSrxTiO3) by Co precipitation Method

International Conference on Advanced Materials for Better Future 2016

Subarwanti, Y.^1 ; Safitri, R.D.^1 ; Supriyanto, A.^2 ; Iriani, Y.^2 ; Jamaludin, A.^3

Graduate Physics Department, Sebelas Maret University, Surakarta, Indonesia^1

Physics Departement, Faculty of Mathematics and Natural Sciences, Sebelas Maret University, Surakarta, Indonesia^2

Physics Department, FKIP, Sebelas Maret University, Surakarta, Indonesia^3

关键词: Coprecipitation method;    Crystallinities;    Dielectric constants (k);    Diffraction angle;    Frequency ranges;    Holding time;    Paraelectric phase;    Resistance capacitance inductances;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/176/1/012044/pdf
DOI  :  10.1088/1757-899X/176/1/012044

来源: IOP

【 摘 要 】

Barium Strontium Titanate (BST) have been made with variation strontium (Sr) 10%, 30% and 50% by co-precipitation method. This study aims to determine influence addition Sr against the crystal structure, crystallite size, lattice parameter, grain size and dielectric constant. Samples have been made by co-precipitation method and then the samples were sintered by furnace at 1100°C with holding time 4 hours. Characterization of BST use X-Ray Diffraction instrument, Scanning Electron Microscopy and Resistance Capacitance Inductance (RCL meter). Based on result obtained, the larger Sr content cause the diffraction angle shift to the right (the greater) and crystallinity increasing. But, the value of dielectric constant, crystallite size and grain size decreasing with additional Sr content. Measurement of dielectric constant (K) performed in the frequency range 1 kHz to 100 kHz and the highest value at Sr content 0.1 i.e. 258.35. The addition of Sr content 30% and 50% change the crystal structure from tetragonal to cubic which has paraelectric phase.