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《中国地球化学学报:英文版》
>^(29)Si, ^(27)Al Magic-Angle-Spinning Nuclear Magnetic Resonance (MAS NMR) Studies of Kaolinite and Its Thermal Transformation Products
^(29)Si, ^(27)Al Magic-Angle-Spinning Nuclear Magnetic Resonance (MAS NMR) Studies of Kaolinite and Its Thermal Transformation Products
^27Al,^29Si MAS NMR studies of kaolinite and its thermal transformation products show that in the kaolinite-mullite reaction series there is an extensive segregation of Al2O3 and SiO2 and the reaction of Al2O3 with SiO2 to form mullite is the main path of mullite formation.At about 850°C,the peak intensity of Al(V) reaches its maximum and with the further rise of temperature the Al(V)signal completely disappears.At about 950°C,γ-Al2O3 accounts for about 71%of the material phases containing Al atoms.In the series there is no obvious presence of Al-Si spinel.The ^27Al and ^29Si MAS NMR spectra show that there is an obvious difference between the temperature points for Al-O2(OH)4 octahedral sheet collapsing and Si-O4 tetrahedral sheet breaking down.
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机译:应用delaésonancemagnétiquenucléaire(NmR)in milieu poreux Lissage des courbes de relaxation RmN du domaine du temps paruneméthodedemisionèteetcontinue Nuclear magnetic Resonance(Nmr)在多孔介质中的应用时间依赖Nmr松弛曲线平滑使用离散连续方法