Open AccessInfluence of Mixing Time to Crystal Structure and Dielectric Constant of Ba0,9Sr0,1TiO3
Author(s) -
Dianisa Khoirum Sandi,
Agus Supriyanto,
A. Jamaludin,
Yofentina Iriani
Publication year - 2015
Publication title -
indonesian journal of applied physics
Language(s) - English
Resource type - Journals
eISSN - 2477-6416
pISSN - 2089-0133
DOI - 10.13057/ijap.v5i02.290
Subject(s) - analytical chemistry (journal) , materials science , tetragonal crystal system , crystallography , crystal structure , chemistry , chromatography
Barium Strontium Titanate (Ba 1-x Sr x TiO 3 ) or BST has been synthesized using solid state reaction method. Raw materials of BST were BaCO 3 , SrCO 3 , and TiO 2 . Those materials were mixed, pressed, and sintered at temperature 1200 o C for 2 h. Mixing time of raw materials was varied to identify its effects on crystal structures and dielectrics constant of Ba 0.9 Sr 0.1 TiO 3 using X-Ray Diffraction (XRD) and LCR meter instrument, respectively. The results of XRD showed that crystals structure of Ba 0.9 Sr 0.1 TiO 3 is tetragonal. Lattice parameter of Ba 0.9 Sr 0.1 TiO 3 for 6 h of mixing time is a = b = 3.988 Å and c = 3.998 Å. Lattice parameter of Ba 0.9 Sr 0.1 TiO 3 for 8 h of mixing time is a = b = 3.976 Å and c = 4.000 Å. Crystalline size of Ba 0.9 Sr 0.1 TiO 3 was calculated using Scherrer equation. Crystalline size, crystallinity, and dielectric constant of Ba 0.9 Sr 0.1 TiO 3 for 6 h of mixing time is 38 nm, 96%, and 115 at frequency 1 KHz, respectively while their value for 8 h of mixing time is 39 nm, 96%, and 196 at frequency 1 KHz, respectively. Thus it can be concluded that mixing time affects the lattice parameters of Ba 0.9 Sr 0.1 TiO 3 crystal. The longer mixing time causes crystalline size, crystallinity, and dielectrics constant increase.