Struktur Mikro dan Sifat Listrik Material Ferroelektrik Barium Titanat dengan doping Stronsium Suwarni, Alpi Zaidah, Agus Supriyanto, Anif Jamaluddin, Yofentina Iriani

Abstract

Barium Strontium Titanate ferroelectric material (Ba_xSr_1-xTiO₃) with doping variation Sr 0.01 mol; 0.02 and 0.03 have been made using solid state reaction method. Samples printed in the form of bulk (solid) and then in-sintering at a temperature of 900⁰ C with a holding time 2 hours. Characterization of samples was performed using X-Ray Diffractometer (XRD) to determine the level kekristalan and crystal size of the sample. RCL meter testing to determine the value of the dielectric constant. XRD characterization results of the samples obtained data and processed in the form of a graph of intensity against angle 2 theta. BST material with doping variation Sr 0.01 mol; 0.02 and 0.03 have a tetragonal crystal structure, in which the Sr lattice parameter of 0.01 and 0.03 are the same, namely a = b = 3.996 Å and c = 4.012 Å, while for Sr 0.02 is a = b = 3.998 Å and c = 4.022 Å. Crystal size respectively adalah 28.4 nm; 32.3 nm and 54.8 nm. The larger the crystal size, the average value of the smaller lattice strain along with the increasing addition of Sr. Measurement of dielectric constant (K) performed in the frequency range 1 kHz to 80 kHz and the highest value was at 0.03 Sr at 18.55.