Pembuatan Material Ferroelektrik Barium Titanat (BaTiO3) menggunakan Metode Kopresipitasi Ramona Dyah Safitri, Yunita Subarwanti, Agus Supriyanto, Anif Jamaluddin, Yofentina Iriani

Abstract

Barium titanate BaTiO3 samples have been prepared by coprecipitation method. Samples are sintered at 900C with holding time to 2, 3 and 4 hours. Crystallization is test performed with X-Ray Diffractometer (XRD) instrument. Dielectric constant values are obtained by testing with RCL meter. Based on the analizes of calculation results, for holding time 2 hours the lattice parameters of BaTiO3 are a = b = 4.0057 nm, c = 4.0124 nm, lattice parameters with holding time 3 hours are a = b = 3.9994 nm; c = 4.0532 nm and lattice parameters 4 hours are a = b = 4,0105nm, c = 4,0642. The crystal structure formed are tetragonal. The size of crytals samples with holding time 2, 3 and 4 hours are 25.5 nm, 27.2 nm and 27,3 nm respectifely. Measurement of dielectric constants is performed in the range of frequency 1kHz. Rated dielectric constant samples with holding time 2, 3 and 4 hours are 90, 172 and 184. The dielectric constant is directly proportional to the time of sintering, therefore capacitance of samples are large.