This study aims to make a thin layer of TiO2 based on ilmenite stored in iron sand of Lampung Province, Indonesia. The TiO2 powder, which was used to make the thin layer, was obtained from the extraction of iron sand using the leaching method with a purity of 60,7%. The preparation of TiO2 thin layers was carried out by the Chemical Bath Deposition (CBD) method with immersion time variations of 2, 3, 4, and 5 hours for samples A, B, C, and D respectively. Afterward, the samples were calcined at 500°C for 4 hours. The characterizations involved X-Ray Diffraction (XRD), Scanning Electron Microscope (SEM), X-Ray Fluorescence (XRF), and four-point probe to measure the resistivity of the film. The XRD results in samples A (immersion time 2 hours) and D (immersion time 5 hours) show that the amorphous phase still dominates even though the diffraction peaks indicate that the presence of crystals has started to grow at several angles of scattering. The identification results of the phase presence show that the thin layer of TiO2 at sample D is the brookite phase. The results of characterization using SEM show that the surface of the TiO2 thin layer forms a porous structure. The average thickness of the thin film at sample B based on SEM analysis is 1.9 μm. The electrical resistivity increased with an increasing immersion time.

Ilmenite is a natural material in the form of sand which contains heavy metal minerals that are very abundant in Lampung province. This research aims to determine the content of TiO2 from Lampungs iron sand by leaching method with temperature variation. The iron sand are mixed with sodium hydrogen carbonate (NaHCO3), then heated at 700 • C for an hour. This research uses 5 samples with leaching temperature variation of 70, 80, 90, 100, and 110 • C for 2 hours. The acid leaching process uses HCl 12 M with a ratio of iron sand and HCl of 1:4, while the water leaching process uses 50 ml of distilled water. Furthermore, the samples are characterized using XRD and XRF to determine TiO2 content in the iron sand. The result shows that the highest amount of TiO2 is obtained in the sample with the leaching temperature of 110 • C for 2 hours, which is approximately 61%.

Ilmenite is one of the natural materials that are abundant in Lampung province. This research was conducted to determine the content of TiO2 from ilmenite Lampung by the leaching method. Previously, iron sand was mixed with sodium hydrogen carbonate (NaHCO3) and roasted at 700ºC for an hour. In this research, five samples were used to determine the TiO2 content of ilmenite Lampung, with variations in leaching time of 2, 3, 4, 5, and 6 hours at 110ºC. The acid leaching process was carried out using 12 M HCl with a ratio of 1: 4. Then the water leaching process was carried out using 50 ml distilled water. Furthermore, all samples were characterized using XRD and XRF to determine the content in Lampung ilmenite sand. In general, XRD analysis results have succeeded in increasing the rutile phase which is influenced by the heating temperature. The highest TiO2 content of Lampung ilmenite sand was obtained in samples with a leaching time variation of 2 hours at a temperature of 110ºC i.e. 60.701%.