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Magnesium Aluminate (MgAl 2 O 4 ) Spinel Powders from Water‐Based Sols
Author(s) -
Naskar Milan Kanti,
Chatterjee Minati
Publication year - 2005
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2004.00019.x
Subject(s) - spinel , differential thermal analysis , thermogravimetry , materials science , calcination , scanning electron microscope , aluminate , crystallization , mineralogy , particle size , chemical engineering , fourier transform infrared spectroscopy , thermal analysis , sol gel , analytical chemistry (journal) , nuclear chemistry , chemistry , diffraction , metallurgy , chromatography , thermal , nanotechnology , composite material , cement , biochemistry , physics , meteorology , optics , engineering , catalysis
Magnesium aluminate (MgAl 2 O 4 ) spinel powders of irregular and spherical morphologies were obtained from the bi‐component water‐based sols following the sol–gel and sol–emulsion–gel methods, respectively. For the synthesis of the oxide microspheres, the surfactant concentration and viscosity of the sols were found to affect the characteristics of the derived microspheres. The gel and calcined powders were investigated by using thermogravimetry analysis, differential thermal analysis, X‐ray diffraction (XRD), optical and scanning electron microscopy (SEM), Fourier transformed infrared spectroscopy, and particle size analysis. XRD results indicated crystallization of the only phase MgAl 2 O 4 spinel from 200° to 1000°C. Formation of hollow microspheres with a single cavity was identified by SEM.