Pembuatan Material Ferroelektrik Barium Titanat (BaTiO3) menggunakan Metode Kopresipitasi

Ramona Dyah Safitri, Yunita Subarwanti, Agus Supriyanto, Anif Jamaluddin, Yofentina Iriani

Abstract


Sampel Barium titanat (BaTiO3) telah dibuat dengan metode coprecipitation. Sampel disintering pada suhu 900C dengan variasi waktu tahan 2, 3, dan 4 jam. Uji kekristalan dilakukan dengan instrumen X-Ray Diffractometer (XRD). Nilai konstanta dielektrik diperoleh melalui pengujian dengan RCL meter. Berdasarkan analisis hasil perhitungan, parameter kisi BaTiO3 dengan waktu tahan 2 jam adalah a = b = 4,0057 nm, c = 4,0124 nm, parameter kisi untuk waktu tahan 3 jam adalah a = b = 4,0124 nm, c = 4,0532 nm dan parameter kisi untuk waktu tahan 4 jam adalah a = b = 4,0105 nm, c = 4,0642nm. Struktur krital yang didapatkan adalah tetragonal. Ukuran kristal sampel dengan waktu tahan 2 jam, 3 jam dan 4 jam adalah 25,5 nm, 27,2 nm dan 27,3 nm. Pengukuran konstanta dielektrik (K) dilakukan pada rentang frekuensi 1 kHz. Nilai K sampel dengan waktu tahan 2, 3, dan 4 jam adalah 90, 172 dan 184. Semakin lama waktu tahan sintering, konstanta dielektrik yang dihasilkan juga semakin besar sehingga kapasitansi sampel lebih besar.


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.


Keywords


Barium titanate, dielectric constant, coprecipitation, lattice parameter

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DOI: http://dx.doi.org/10.12962/j24604682.v12i3.1342

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