Effect of Acid Concentration on Surface Area of Sol-Gel Derived Y2O3
Keywords:
Y2O3, Phosphorus, Acid Concantration, Surface AreaAbstract
Yttrium oxide (Y2O3) ceramics have been investigated in detail for many technological purposes and used as important material in the ceramic industry, ceramic superconductors, MOS transistors and light-emitting materials. Phosphor materials are important tools for the efficient utilization of current energy. These materials can be used in various fields such as display panels, fluorescent paints, and bio-imaging. In this study, Y2O3 phosphor particles with different surface areas were produced using the sol-gel method. The aim of the study is to investigate the effect of citric acid concentration used in the solution preparation stage on the surface area of the final product. Luminescent materials can be more effectively used with increasing surface area. For this purpose, starting solutions with three different acid concentrations were prepared. The solutions were prepared to have citric acid concentrations with respect to the total metal ions (MRCM) at 0.5, 1, and 2 molar concentrations. The organic contents of the dried solutions were compared using Fourier transform infrared (FTIR) spectroscopy, and the phase structures of the obtained samples after heat treatment were analyzed using X-ray diffraction (XRD). The surface areas of the final Y2O3 particles were measured and characterized using Brunauer-Emmett-Teller (BET) analysis. It is observed that the acid concentration significantly changed the surface area of Y2O3. The surface areas of the Y2O3 particles increased with increasing acid concentration. The surface areas of the samples with MRCM values of 0.5, 1, and 2 were measured as 19.16 m2/g, 32.76 m2/g, and 53.48 m2/g, respectively. The study showed that the surface area, which affects the luminescent properties of phosphor materials, can be easily modified using the sol-gel method.
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