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Both whisker and nanometer MgSO4·5Mg(OH)2·3H2O(MOS) were prepared by hydrothermal method at 140℃for different times, using NaOH and MgSO4·7H2O as raw materials. The MgSO4·5Mg(OH)2·3H2O part icles were characterized by powder X ray diffraction(XRD),thermal analysis(TGA DSC), infrared spectroscopy(FT IR),transmission electron microscopy(SEM) and scanning electron microscopy(TEM). The size distribution in whisker like and nanocrystalline materials arein the range of 10～50μm and 10～20nm respectively. The whisker MOS is metastable phase in MgSO4 NaOH H2O system at 140℃,whereas nanometer MOS is stable phase.
Both whisker and nanometer MgSO4 · 5Mg (OH) 2 · 3H2O (MOS) were prepared by hydrothermal method at 140 ℃ for different times, using NaOH and MgSO4 · 7H2O as raw materials. The MgSO4 · 5Mg (OH) 2 · 3H2O particles were characterized by powder X-ray diffraction (XRD), thermal analysis (TGA DSC), infrared spectroscopy (FT IR), transmission electron microscopy (SEM) and scanning electron microscopy (TEM). The size distribution in whisker like and nanocrystalline materials are in the range 10 ~ 50μm and 10 ~ 20nm respectively. The whisker MOS is metastable phase in MgSO4 NaOH H2O system at 140 ℃, while nanometer MOS is stable phase.