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The noncrystalline-forming region in theLi_2O-P_2O_5-V_2O_5 system is determined under ourexperiment condition.The densities andtransformation temperatures of the samples aremeasured.IR and Raman spectra are used tostudy the noncrystalline structure.The effectof Li_2O on noncrystalline structure is studiedmainly,and it serves the function of aggregatingnetwork if Li_2O content is less than 10mol%,butit serves the function of loosening network ifLi_2O content exceeds 10mol%.The study on thestructure shows that the noncrystalline networkis composed of [PO_4] tetrahedra and [VO_5]trigonal bipyramids.The result indicates thatthe characteristic vibration peak of [VO_5]unit with V=O occurs at 1020-940 cm~(-1).Apossible noncrystalline structure model in thesystem is given.
The noncrystalline-forming region in the Li 2 O-P 2 O 5 -V 2 O 5 system is determined under ourexperiment conditions. These densities and transmission temperatures of the samples are measured. IR and Raman spectra are used to study the noncrystalline structure. The effect of Li 2 O on noncrystalline structures is studiedmainly, and it serves the function of aggregating network if Li 2 O content is less than 10 mol%, butit serves the function of loosening network if Li 2 O content exceeds 10 mol%. The study on the structure shows that the noncrystalline network composed of [PO_4] tetrahedra and [VO_5] trigonal bipyramids.The result indicates that the characteristic vibration peak of [VO_5] unit with V = O occurs at 1020-940 cm -1. Apossible noncrystalline structure model in the system is given.