Siti Machmudah, Widiyastuti, Sugeng Winardi : Mechanism of Macroporous Zirconia Particles Formation Prepared by Hydrothermal Synthesis
Dr.Eng. Siti Machmudah , ST.,M.Eng.
Dr.Eng Widiyastuti ST., MT.
Prof.Dr.Ir. Sugeng Winardi M.Eng
Advanced Materials Research
Hydrothermal; Zirconia; Macroporous Particles; Polystyrene; Template
The purpose of this work was to investigate the mechanism of macroporous zirconia particles formation by hydrothermal synthesis. Hydrothermal synthesis of zirconia was prepared from precursor solution of Zr(NO3)2 with a concentration of 0.3 M at temperatures of 300 and 200oC carried out in a batch and a continuous reactor, respectively. Hydrothermally synthesized colloid subsequently was mixed with polystyrene template to form macroporous zirconia particles, and then was synthesized hydrothermally for 1 hour at temperature of 150oC and 200oC. Once the synthesis was complete, the particles were then dried at temperature of 60oC for 6 hours. In order to eliminate polystyrene template from the particles, the dried particles were calcined at temperature of 600oC and 900oC for 6 hours. The morphology of particles formed were characterized by scanning electron microscope (SEM) and Particle Size Analyzer (PSA). The analytical result showed that macroporous particles were formed at all experimental condition, and the mechanism of macroporous particles formation could be observed clearly. Based on the XRD analysis, the crystal zirconia consisted of monoclinic and tetragonal phase.