Influence of Mixing Time to Crystal Structure and Dielectric Constant of Ba0,9Sr0,1TiO3
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 A and c 3.998 A. Lattice parameter of Ba 0.9 Sr 0.1 TiO 3 for 8 h of mixing time is a b 3.976 A and c 4.000 A. 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.