Aqueous sol-gel synthesis and thermoanalytical study of the alkaline earth molybdate precursors

作者：Braziulis Gediminas; Janulevicius Gytautas; Stankeviciute Ruta; Zalga Arturas^*

来源：Journal of Thermal Analysis and Calorimetry, 2014, 118(2): 613-621.

DOI：10.1007/s10973-013-3579-0

• Alkaline earth metals
• Sol-gel processing
• Thermal analysis

The preparation and characterization of the M'aEuro"Mo-O nitrate-tartrate (M' = Mg, Ca, Sr, and Ba) gels, which were produced by the simple aqueous sol-gel method and calcined at 500, 600, 700, 800, 900, and 1,000 A degrees C temperatures are reported. The crystalline alkaline earth metal molybdates (MgMoO4, CaMoO4, SrMoO4, and BaMoO4) and as-prepared M'aEuro"Mo-O nitrate-tartrate gels investigated by thermal analysis (TG/DSC), X-ray diffraction (XRD), and scanning electron microscopy (SEM). TG/DSC analysis showed the possible decomposition mechanism of synthesized gels. XRD studies allowed the identification of main types of crystalline structures in the MgMoO4, CaMoO4, SrMoO4, and BaMoO4 systems. Moreover, SEM analysis revealed the changes of surface morphology of the final compounds depending on annealing temperatures.

• 出版日期2014-11