Structural studies of the NaCaPO4–SiO2 sol–gel derived materials

摘要: Structural studies of the NaCaPO4– SiO2 materials have been carried out. Amorphous from this system, after controlled crystallization process, can be used as potential nanomaterials. nanomaterials are fundamental importance in view their future applications. Materials different [PO4] 32 /[SiO4] 42 tetrahedra proportion prepared. Na þ and Ca 2þ cations compensated negative charge lattice. crystalline obtained by sol – gel well conventional melting methods. The XRD phase identification has enabled amorphous suggests separation phosphorus silicate phases. were examined using electron scanning microscope EDX spectrometer. Analysis maps shows considerable inhomogeneity samples. Fluctuations ions distribution, case materials, noted too. DTA investigations to find probable characteristic temperatures glass crystallization. Detailed infrared spectroscopy measurements spectra compared with cristobalite. Spectroscopic confirm materials. q 2003 Elsevier Science B.V. All rights reserved.