ABSTRAK
Bulk (padatan) material ferroelektrik Barium Strontium Titanat (Ba1-xSrxTiO3) telah dibuat menggunakan metode solid state reaction. Sampel di-doping dengan variasi mol Sr 1%, 2%, 3%, 4%, 5% dan di-sintering pada suhu 1000oC dan 1100oC. Karakterisasi sampel dilakukan menggunakan peralatan XRD untuk mengetahui tingkat kekristalan dan ukuran kristal dari sampel. Selanjutnya penghalusan (refinement) dilakukan menggunakan metode Rietvield. Software GSAS EXPGUI untuk menganalisa kesesuaian antara pola difraksi bulk Ba1-xSrxTiO3 yang dihasilkan dengan database. Semakin tinggi komposisi doping mol Sr ukuran kristal semakin besar. Rangkaian sawyer tower adalah untuk mendapatkan kurva histerisis. Morfologi Ba1-xSrxTiO3 yang di-sintering pada suhu 1100°C diuji dengan  nstrument Scanning Electron Microscopy (SEM), dimana semakin banyak komposisi mol Sr menyebabkan ukuran butir kristal semakin besar. Pengujian menggunakan alat RCL meter digunakan untuk mengetahui konstanta dielektrik, pengukuran dilakukan pada rentang frekuensi 1 kHz sampai 100 kHz. Suhu sintering yang semakin bertambah mengakibatkan nilai intensitas, ukuran kristal, kristalinitas dan ukuran butir semakin besar begitu juga dengan konstanta dielektrik yang dihasilkan semakin tinggi. Konstanta dielektrik (K) tertinggi adalah pada suhu 1100oC dengan ketebalan 0,004 m, dan doping mol Sr 5% yaitu sebesar 456.
Kata Kunci: Barium Strontium Titanat, Doping, Ferroelektrik, Ukuran Kristal, Konstanta Dielektrik.
ABSTRACT
Bulk (solid) of ferroelectric material of Barium Strontium Titanate (Ba1-xSrxTiO3) has been made using solid state reaction method. Sample was doped with mole of Sr variatition, that are 1%, 2%, 3%, 4%, 5% and was sintered at a temperature of 1000oC and 1100oC. Characterization of samples was performed using equipment of X-Ray Diffractometer (XRD) to determine the level of crystal form and crystal size of the sample. And then refinement is performed using Rietvield method. EXPGUI GSAS software to analyze compatibility among bulk diffraction patterns of  Ba1-xSrxTiO3 that be generated by the database. The higher the mole of Sr composition doping causes crystal size became bigger. Sawyer tower circuit was to got a hysteresis curve. The Morphology of Ba1-xSrxTiO3 that be sintered at 1100°C was tested with instruments of Scanning Electron Microscopy (SEM), which a growing number of moles of Sr composition causes the crystal grain size became bigger. The Tests using the equipment of RLC meter is used to determine the dielectric constant, the measurement is done on the frequency range 1 kHz to 100 kHz. The temperature of sintering are increasing causes intensity values, the crystal size, crystallinity and grain size became bigger too and the dielectric constant that be resulted is higher. The dielectric constant (K) is the highest in temperature 1100oC with a thickness of 0,004 m, and the mole of Sr doping for 5% is equal to 456.
Keywords: Barium Strontium Titanate, Doping, Ferroelectric, Size of Crystals, Dielectric Constant.