Structural and morphological characterization of Pr3+ and Er3+-containing SiO2–P2O5 sol–gel thin films

Elisa, M.; Sava, Bogdan Alexandru; Vasiliu, Ileana Cristina; Nastase, F.; Nastase, C.; Volceanov, Adrian; Stoleriu, Ştefania

doi:10.1016/j.matchemphys.2011.10.031

Cited by 11 publications

(4 citation statements)

References 26 publications

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“…A weak and broad absorption band, attributed to the presence of residues of the organic substrates, was present in the initial It was only for the main asymmetric stretching mode of the Si-O bond that a slight change in the position of the band maximum was observed. Upon dehydration, this position shifted towards higher frequencies, from about 1050 cm −1 for the initially dried sample to 1065 cm −1 after annealing [62,63]. The observed effect was virtually independent of the type of the organic additive used (according to the data for PEO-modified materials in the present paper, along with those presented previously [27] for PVA-modified materials).…”

Section: Ftir and Ft-raman Spectroscopy Resultssupporting

confidence: 82%

Ionic Transport Properties of P2O5-SiO2 Glassy Protonic Composites Doped with Polymer and Inorganic Titanium-based Fillers

et al. 2020

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This paper is focused on the determination of the physicochemical properties of a composite inorganic–organic modified membrane. The electrical conductivity of a family of glassy protonic electrolytes defined by the general formula (P2O5)x(SiO2)y, where x/y is 3/7 are studied by Alternating Current electrochemical impedance spectroscopy (AC EIS) method. The reference glass was doped with polymeric additives—poly(ethylene oxide) (PEO) and poly(vinyl alcohol) (PVA), and additionally with a titanium-oxide-based filler. Special attention was paid to determination of the transport properties of the materials thus modified in relation to the charge transfer phenomena occurring within them. The electrical conductivities of the ‘dry’ material ranged from 10−4 to 10−9 S/cm, whereas for ‘wet’ samples the values were ~10−3 S/cm. The additives also modified the pore space of the samples. The pore distribution and specific surface of the modified glassy systems exhibited variation with changes in electrolyte chemical composition. The mechanical properties of the samples were also examined. The Young’s modulus and Poisson’s ratio were determined by the continuous wave technique (CWT). Based on analysis of the dispersion of the dielectric losses, it was found that the composite samples exhibit mixed-type proton mobility with contributions related to both the bulk of the material and the surface of the pore space.

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Section: Ftir and Ft-raman Spectroscopy Resultssupporting

confidence: 82%

Ionic Transport Properties of P2O5-SiO2 Glassy Protonic Composites Doped with Polymer and Inorganic Titanium-based Fillers

et al. 2020

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“…9-12, assigned according to literature data [15,[17][18][19][20][21][22][23][24][25], are presented in Tables 6 and 7, for the chosen four samples dried in air and thermal treated at 900°C, respectively.…”

Section: Discussionmentioning

confidence: 99%

“…Raman peaks for the samples 1, 7, 21 and 26 treated at 900°C, assigned according to literature data[15,[17][18][19][20][21][22][23]25]. Proposed assignments of 31P and 29Si isotropic resonances related to silico-phosphate gels[26,28].…”

mentioning

confidence: 99%

Investigations on sol–gel process and structural characterization of SiO2-P2O5 powders

Sava

Elisa

Vasiliu

et al. 2012

Journal of Non-Crystalline Solids

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“…This treatment removes alcohol and water (up to 400 °С), and then burning and removal of alcohol and products of thermo-oxidative degradation of etoxy groups take place (up to 600 °С). At that film system differentiates [5,6] in respect to composition with creation of the fields providing following crystallization of phases Са 2 Р 2 O 7 , СаSiO 3 , SiO 2 , and chlorapatite in quantity up to 5% in accordance with X-ray analysis. The films have specific surface 18 m 2 /g, pore size 17 nm and high adsorption properties, that was duty presence of Brensted surface-active centers (pH = 10-10.8).…”

mentioning

confidence: 95%

Effectiveness of the Technologies of Titanium Implants Covering

Petrovskaya

Vereschagin

2015

KEM

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The aim of this work is to improve the known methods of forming coatings on titanium implants: anodizing, plasma spraying, and ceramic one. For this purpose we use hydroxyapatite (HA) obtained from biological raw materials by roasting technology that preserves the microstructure of natural HA. The sol-gel method has been used to impart bioactivity to anodic coatings. In addition, criteria for evaluating the effectiveness of the methods for forming coatings, based on analysis of author data and expert opinions, are proposed. The evaluation of the methods used in this paper is presented.

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Structural and morphological characterization of Pr3+ and Er3+-containing SiO2–P2O5 sol–gel thin films

Cited by 11 publications

References 26 publications

Ionic Transport Properties of P2O5-SiO2 Glassy Protonic Composites Doped with Polymer and Inorganic Titanium-based Fillers

Ionic Transport Properties of P2O5-SiO2 Glassy Protonic Composites Doped with Polymer and Inorganic Titanium-based Fillers

Investigations on sol–gel process and structural characterization of SiO2-P2O5 powders

Effectiveness of the Technologies of Titanium Implants Covering

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