SYNTHESIS AND CHARACTERIZATION OF ZNTIO3 AND THE EFFECT OF ADDING CA(II), SR(II), AND BA(II) DOPANTS

• Main Author: MUHAMAD FADLI FAUZI (NIM : 10507058); Pembimbing Dr. Bambang Prijamboedi
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/16521
• Institution: Institut Teknologi Bandung

Zinc titanate (ZnTiO3) with a perovskite structure is a potential material for microwave dielectrics, gas sensor, sorbent in hot coal desulfurization, organic waste degradation, photocatalytic, etc. ZnO-TiO2 system usually results in one or more phases: ZnTi3O8, Zn2TiO4, and ZnTiO3. In this research, the synthesis of ZnTiO3 takes place through solid state reaction to obtain pure ZnTiO3 crystal and observe the effect of adding Ca(II), Sr(II), and Ba(II) dopants into ZnO-TiO2 system. Zinc titanate was synthesized from ZnO and TiO2 as precursor that sintered at 900 oC for 24, 48, and 96 hours. The second condition, a mixture was sintered at 850 oC for 36 and 48 hours. A doped sample, by adding 0,2 mol dopant into ZnO-TiO2 system, was sintered at 900 oC for 24 hours. X-ray diffraction measurement was carried out in order to identify the phases in samples. Sample with low impurity was produced for sintering condition at 900 oC and 24 hours. The addition of dopants cause impurities like Zn2TiO4 and Zn2Ti3O8 to be clearly observed. Electric resistivity of pure ZnTiO3 increase with increasing measurement temperature. It shows that ZnTiO3 is conductor. While in doped sample, the resistivity increase with increasing temperature and shows 2 peaks in 250-350 oC region. Type of dopants influence resistivity value and type of dopants also affect anomalous peak width within resistivity measurement. Unit cell, a and b, was observed to decrease with addition of Ca, Sr, and Ba dopants. Grain size of particle of doped samples increases with increasing ionic radius of dopants from Ca to Ba, respectively. <br />