- Stearic acid gel derived MgTiO3 nanoparticles: A low temperature intermediate phase of Mg2TiO4
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Stearic acid gel is employed to study the phase evolution of MgTiO3 nanoparticles by thermal gravimetric analysis, X-ray diffraction, and Fourier transform infrared. During the preparation of stearic acid gel, tetrabutyl titanate easily absorbed moisture to hydrolyze into Ti(OH)4 firstly, and then reacts with stearic acid and magnesium stearate to form magnesium-titanium oxide network polymer gel, meanwhile n-butanol is generated. When stearic acid gel is calcined in air, a series of oxidation and combustion reactions occur, meanwhile apparent heat is given off. The results show that a metastable intermediate phase Mg2TiO4 is generated at 450 °C and nearly disappeared at 550 °C. Simultaneously, a new solid phase of MgTiO3 appears. The metastable intermediate phase Mg2TiO4 is successfully identified in the current work.
- Li, Dandan,Wang, Liqiu,Xue, Dongfeng
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experimental part
p. 564 - 569
(2010/06/12)
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