Edx spectroscopy pdf

Gonzalez, J. Ti-labelled silica was mixed with 0. EDX measurements indicated that the silica grains were by elemental Pt analysis of samples of the solution taken at regular time labelled with Ti.

It was also established that the loading of 1 g of Ti intervals. Elemental analysis was performed with a ICP Jovin Yvo labelled silica does not vary when it is impregnated with 30 ml of apparatus. Two 5 min and 24 h of contact were analyzed. The influence the results. Downloaded on 24 August Chem. Cadete Santos Aires.

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The O 1s, Fe 2p, P 2p core 24 h in ethyl alcohol. Orliukas et al. The stoichiometric amounts of precursors were mixed and heated in the argon atmosphere for 1 h at K. Ceramics were sintered for all the measurements. The powder was pressed at MPa. LiFePO4 ceramics were sin- tered for 10 h at K in air. Chemical bonding states of the constituent ele- b ments of the surfaces of the ceramics were examined by XPS. The residual pressure in the analyser chamber was 1.

Investigation of electrical properties Fig. The binding energies in XPS were calibrated by as- signing the C 1s peak to The grain rated from the intensive overlapping Fe 3p peak. Figure 2 a, b shows EDX spectra. The re- from Grosvenor et al.

Al2O3 substrates used for sintering can be binding energies of For LiFePO4 ceram- element is up to 1 at. Table 1. The results summarized in at the binding energies of These values the binding energy region towards to a higher energy are larger than in oxide Fe3O4 [13] because the shift- and correlates with results published in [10]. In the investigated compounds iron are located in the binding energy ranges from The increase The peak at the binding energy of Two Fe 2p satellite peaks are located at PO3 — group as in [17] and other peaks at The two P 2p peaks in LiFePO4 are at the surface four peaks with different binding energies were binding energies of The O 1s peak see Table 1 at the binding than The binding energy of the the lattice oxygen O2— bond P—O at the normal sites of P 2p peak in compounds with a different structure was the orthorhombic structure, while the other two O 1s found to be This re- [15], In the present work, the measurements of electri- cal properties were carried out in the broadband fre- quency range at different temperatures.

Such investi- gations enable to study ionic transport peculiarities in grain boundaries and grains of the ceramics. Characteristic frequency dependences of imagi- nary part of complex resistivity at different temperatures ics measured at different temperatures are showed in of LiFePO4 ceramics. The dispersion regions shift towards higher frequencies as temperature increases. This phenomenon is typical of relaxation-type dispersions [20, 21].

The low frequency dispersion regions can be associated with relaxation processes in the grain boundary of the ceramics. The dispersion at high frequencies is caused by ionic trans- port in the bulk of the ceramics. In Fig. Temperature dependences of relaxation fre- posite are presented in Fig. Arrhenius plots of fgb and fb. The temperature dependences of dielectric per- Fig. Impedance spectra of LiFePO4 ceramics at differ- ent temperatures.