scholarly journals Determination of ionic conductivity in the Bi-Si-O and Pb-Si-O glasses

2018 ◽  
Vol 35 (4) ◽  
pp. 681-686 ◽  
Author(s):  
J. Karczewski ◽  
T. Miruszewski ◽  
B. Bochentyn ◽  
B. Kusz
Keyword(s):  
Electrical Conductivity ◽  
Ionic Conductivity ◽  
Glass Structure ◽  
Charge Carriers ◽  
Silicate Glasses ◽  
Lead Silicate ◽  
Bismuth Silicate ◽  
Oxygen Ions ◽  
Oxygen Defects

Abstract Impedance spectroscopy measurements in various gas atmospheres were carried out in order to explain the doubts about the type of carriers and the mechanism of electrical conductivity in Bi-Si-O and Pb-Si-O glasses. In bismuth silicate glass, a typical ionic conductivity with oxygen ions as charge carriers was observed. The level of electrical conductivity of the glass at 400 °C was 5 × 10-8 S·cm-1, with the activation energy of 1.3 eV and was independent of measuring atmosphere. In the case of lead silicate glasses, the conductivity changed with measuring atmosphere. Two types of charge carriers: oxygen ions and proton ions were postulated. Proton conductivity measured in wet argon at temperature 400 °C was estimated at the level of 4 × 10-8 S·cm-1 while the oxygen ions conductivity in such conditions was 78 × 10-8 S·cm-1. We suggest that both types of charge carriers are transported along the same conduction paths using oxygen defects in the glass structure.

scholarly journals Кристаллофизическая модель электропереноса в суперионном проводнике Pb-=SUB=-1-x-=/SUB=-Sc-=SUB=-x-=/SUB=-F-=SUB=-2+x-=/SUB=- (x=0.1)

2018 ◽  
Vol 60 (4) ◽  
pp. 710
Author(s):  
Н.И. Сорокин
Keyword(s):  
Electrical Conductivity ◽  
Ionic Conductivity ◽  
Single Crystals ◽  
Room Temperature ◽  
Charge Carriers ◽  
Bulk Conductivity ◽  
Characteristic Parameters ◽  
Calculated Concentration ◽  
Fluorite Type ◽  
Mobile Ions

AbstractThe frequency (ν = 10^–1–107 Hz) dependences of electrical conductivity σ(ν) of single crystals of superionic conductor Pb_0.9Sc_0.1F_2.1 (10 mol % ScF_3) with fluorite type structure (CaF_2) in the temperature range 153–410 K have been investigated. The static bulk conductivity σ_ dc =1.5 × 10^–4 S/cm and average hopping frequency ν_ h = 1.5 × 10^7 Hz of charge carriers (mobile ions F^−) at room temperature (293 K) have been defined from the σ_ dc (ν) experimental curves. Enthalpies of thermoactivated processes of ionic conductivity σ_ dc ( T ) (Δ H _σ = 0.393 ± 0.005 eV) and dielectric relaxation ν_ h ( T ) (Δ H _h = 0.37 ± 0.03 eV) coincide within their errors. A crystal-physical model of fluorine-ion transport in a Pb_0.9Sc_0.1F_2.1 crystal lattice has been proposed. The characteristic parameters of charge carriers have been calculated: concentration n _mob = 2.0 × 10^21 cm^−3, the distance of the hopping d ≈ 0.5 nm and mobility μ_mob = 4.5 × 10^−7 cm^2/s V (293 K).

Determination of the grain composition of the slurry after diamond grinding of lead silicate glasses

1981 ◽  
Vol 38 (9) ◽  
pp. 459-462
Author(s):  
Yu. Ya. Kumysh ◽  
V. R. Kangun ◽  
Yu. A. Brodskii
Keyword(s):  
Silicate Glasses ◽  
Lead Silicate ◽  
Grain Composition ◽  
Diamond Grinding

Electrical Conductivity and Raman Studies of B2O3-Na2O-NaI Glass Systems

1994 ◽  
Vol 369 ◽  
Author(s):  
Byoung-Koo Choi ◽  
Kyoung-Hee Shin ◽  
Hyo-Kyoung Lee
Keyword(s):  
Electrical Conductivity ◽  
Ionic Conductivity ◽  
Raman Spectra ◽  
Glass Structure ◽  
Wide Range ◽  
Drastic Increase

AbstractGlasses of B2O3-Na2O-Na2I2 have been prepared over a wide range of compositions on the basis of a fixed O/B ratio and a fixed Na/B ratio, respectively. Raman spectra and the ionic conductivity have been measured to elucidate the role of the iodide. In the fixed O/B ratio, a drastic increase of the conductivity with the addition of iodide is observed. The conductivity results are found to be consistent with the Raman results. In the fixed Na/B ratio, the substitution of iodide does not influence significantly the glass structure as well as the ionic conductivity.

scholarly journals Structural and Physical Properties of ZnO Modified Bismuth Silicate Glasses

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
J. Hooda ◽  
R. Punia ◽  
R. S. Kundu ◽  
Sunil Dhankhar ◽  
N. Kishore
Keyword(s):  
Room Temperature ◽  
Glass Structure ◽  
Solubility Limit ◽  
Silicate Glasses ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
Bismuth Silicate ◽  
X Ray ◽  
Increase With Increase ◽  
Glass Compositions

Zinc bismuth silicate glasses with compositions 40SiO2·xZnO·(60-x)Bi2O3 (x=0,5,10,15,20,25,30,35, and 40) have been prepared by conventional melt-quench technique and the solubility limit of zinc in bismuth silicate glass system has been estimated using X-ray diffraction technique. Density has been measured using Archimedes' principle; with increase in ZnO in the samples, the molar volume and density are found to decrease. The glass transition temperature (Tg) has been determined by using differential scanning calorimetry (DSC) and is observed to increase with increase in ZnO content. Raman and FTIR spectra have been recorded at room temperature and the analysis of Raman and FTIR shows that in all the glass compositions, asymmetric and symmetric stretched vibrations of Si–O bonds in SiO4 tetrahedral units exist and with decrease in Bi2O3, the contribution of symmetric vibrations begins to dominate which results in increased compactness of the glass structure.

Determination of the Fe3+/$${\varvec{\Sigma}}$$Fe Ratio in Synthetic Lead Silicate Slags Using X-Band CW-EPR

2021 ◽  
Author(s):  
Vincent Cnockaert ◽  
Inge Bellemans ◽  
Tijl Crivits ◽  
Henk Vrielinck ◽  
Bart Blanpain ◽  
...  
Keyword(s):  
Lead Silicate ◽  
X Band

scholarly journals Structure and transport properties of triple-conducting BaxSr1−xTi1−yFeyO3−δ oxides

RSC Advances ◽  
2021 ◽  
Vol 11 (32) ◽  
pp. 19570-19578
Author(s):  
T. Miruszewski ◽  
K. Dzierzgowski ◽  
P. Winiarz ◽  
D. Jaworski ◽  
K. Wiciak-Pawłowska ◽  
...  
Keyword(s):  
Transport Properties ◽  
Charge Carriers ◽  
Conducting Oxides ◽  
Oxygen Ions ◽  
Perovskite Materials

BaxSr1−xTi1−yFeyO3−δ-based perovskite materials with different barium and iron contents are reported as triple conducting oxides (TCOs), which may conduct three charge carriers: oxygen ions, protons and electrons/holes.

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