Sintesis Keramik Refraktori Al2O3.MnO2.SiO2 Dengan Metoda Sol-Gel dan Sifat Fisikanya Dalam Berbagai Temperatur Kalsinasi

Abstract

Ceramic oxide Al₂O₃.MnO₂.SiO₂ ceramics has relatively high strength, tough electrical capacitance and temperature resistant. It’s synthesized by sol-gel methods using raw materials Tetraethyl Orthosilicates (TEOS), Al (NO₃) ₃.9H₂O and Mn (NO₃) ₂.4H₂O with calcination temperature variation of 900-1100^oC. XRD (X-Ray Diffraction) analysis of ceramic Al₂O₃.MnO₂.SiO₂ showes peak °2Th=33.2875 intensity relatif=100%, °2Th=55.8688 intensity relatif 24,28%,°2Th=26.1289 intensity relatif 13,22%,°2Th=66.4815 intensity relatif 12,84%,°2Th=35.4375 intensity relatif 11,39%. Ceramic Al₂O₃.MnO₂.SiO₂ morphology by SEM (Scanning ElectronMicroscopy) showed that the ceramic at a temperature of 1100^oC was homogeneous microscopic. Capacity as measured by the LCR meter instrument empirical equation F (C, T) = 0.01625 T - 11.0833 can be explained that the higher the calcination temperature the higher the value of the capacitor capacity.