Open AccessThe preparation of Al2O3-Na2SO4 composites derived from local kaolin through an alkaline destruction combined with sulphatization method
Author(s) -
Eneng Maryani,
Naili Sofiyaningsih,
Rifki Septawendar
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/882/1/012026
Subject(s) - calcination , materials science , microstructure , composite number , composite material , impurity , particle (ecology) , infrared spectroscopy , chemical composition , mineralogy , chemistry , catalysis , biochemistry , oceanography , organic chemistry , geology
Composites of Na 2 SO 4 is promising for solid electrolyte application. In this initial study, composites of Al 2 O 3 /Na 2 SO 4 were successfully synthesized from local kaolin through an alkaline destruction method combined with sulphatization. The composites were characterized including thermal behaviour, mineral phases, chemical composition, FT-IR spectra, and microstructures. The composites consist of a-Al 2 O 3 and Na 2 SO 4 phases after calcination at 1300 °C. This phenomenon is confirmed by the XRF and FT-IR result. The composite consists of Al2O3 and Na 2 SO 4 as major components, accounting 41.98% and 47.09% of the total, respectively. Meanwhile, SiO 2 is found as the impurity, accounting 2.86% of the total. The vibration modes of Al-O bonds are detected at 995.27 and 524.46 cm 1 , whereas the SO 4 bands appear at 1111.00 and 617.22 cm 1 . Na 2 SO 4 exhibits a rod-like particle that cover the alumina surface in the morphology.