Monolithic diphasic gels of mullite by sol–gel process under ultrasound stimulation
نویسندگان
چکیده
منابع مشابه
Mullitization of Diphasic Aluminosilicate Gels
Recent studies have shown that the mullitization of diphasic aluminosilicate matrices comprising transitional alumina and amorphous silica occurs via a nucleation and growth process. Nucleation is preceded by a temperature-dependent incubation period. Following this incubation period, rapid nucleation of mullite occurs, producing about 1.8 X 10" nuclei/cm3, which remains constant throughout the...
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Al2O3-SiO2 diphasic gel was synthesized by sol gel route from aluminium nitrate and silicic acid following aqueous phase colloidal interaction. The precursor gel powder was thoroughly characterized by chemical analysis, measurement of surface area and bulk density measurement. The gel powder was further characterized by thermogravimetry, XRD diffraction stud...
متن کاملNon-Isothermal Dehydration Kinetics of Diphasic Mullite Precursor Gel
Aluminosilicate gel precursor having mullite composition was synthesized from inorganic salts of aluminum and silicon by employing the sol-gel method. Chemical analysis, surface area and bulk density measurements were performed to characterize the dried gel. The course of the mullitization was examined by FT-IR analysis which confirmed the diphasic nature of the gel. ...
متن کاملstudies on the formation of mullite from diphasic al2o3-sio2 gel by fourier transform infrared spectroscopy
al2o3-sio2 diphasic gel was synthesized by sol gel route from aluminium nitrate and silicic acid following aqueous phase colloidal interaction. the precursor gel powder was thoroughly characterized by chemical analysis, measurement of surface area and bulk density measurement. the gel powder was further characterized by thermogravimetry, xrd diffraction study of the heat treated samples and sca...
متن کاملNanocomposite mullite/mullite powders by spray pyrolysis
A mullite/mullite nanocomposite powder has been synthesized, composed of nanometer-size 3Al2O3 · 2SiO2 (‘3 : 2’) mullite precipitates within a matrix of the high alumina 2Al2O3 · SiO2 (‘2 : 1’) mullite. Historically, the transition from the metastable high-alumina phase to the thermodynamically stable ‘3 : 2’ phase of mullite has been thought to be a continuous process, involving a continuous s...
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ژورنال
عنوان ژورنال: Ultrasonics Sonochemistry
سال: 1998
ISSN: 1350-4177
DOI: 10.1016/s1350-4177(98)00011-x