Behaviour of ruthenium dioxide particles in borosilicate glasses and melts

Pflieger, Rachel; Lefebvre, Louis‐Philippe; Malki, M.; Allix, Mathieu; Grandjean, Agnès

doi:10.1016/j.jnucmat.2009.02.034

Cited by 24 publications

(13 citation statements)

References 28 publications

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“…In the present case, SEM observations did not indicate coarsening at higher temperatures; however, XRD analyses 25 clearly showed a decrease in the FWHM intensity of RuO 2 diffraction peaks and therefore an increase of the volume-averaged size of the crystallites with temperature. This size increase should also lead to an increase on the interparticle distance and thus a decrease in the tunneling coefficient, which is in contrast to the observed increase in the conductivity.…”

Section: (1) Percolation Law In Fnoc57-ruo 2 Compositescontrasting

confidence: 66%

“…The former was estimated from the weight loss during syntheses under static conditions. It was of the order of 3% for a 2 h heat treatment at 1100°C 25 . The compositions of the composites prepared by the sol–gel route were determined using X‐ray fluorescence; their SiO 2 :Na 2 O weight ratios were between 3.0 and 3.4, and their RuO 2 contents were of 0, 4, and 6 wt% (0, 1.4, and 2.1 vol%).…”

Section: Methodsmentioning

confidence: 99%

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Electrical Conductivity of RuO₂–Borosilicate Glasses: Effect of the Synthesis Route

Pflieger

Malki

Guari

et al. 2009

Journal of the American Ceramic Society

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Although glass–RuO2 composites are well known for their particular electrical properties, the reasons for their very low percolation thresholds are still subject to debate. In this paper, a detailed study of the influence of various experimental parameters (temperature, RuO2 content, stirring, etc.) on the electrical conductivity and, in particular, on the percolation threshold in borosilicate glass–RuO2 composites is presented. This percolation threshold is shown to increase by a factor of two (from 0.6 to 1.2 vol%) when stirring is applied during synthesis and by more than a factor of three (>2.1 vol%) when a sol–gel route is used. Besides, the study of various synthesis temperatures reveals that the electronic part of the electrical conductivity is highly correlated to Ru solubility in the glass matrix. It can be concluded from these various experiments that both the presence of dissolved ruthenium in the glass matrix and the possibility of RuO2 particles to rearrange in the melt in order to form kind of a network are necessary for a low percolation threshold.

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Section: (1) Percolation Law In Fnoc57-ruo 2 Compositescontrasting

confidence: 66%

Section: Methodsmentioning

confidence: 99%

Electrical Conductivity of RuO₂–Borosilicate Glasses: Effect of the Synthesis Route

Pflieger

Malki

Guari

et al. 2009

Journal of the American Ceramic Society

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“…Platinoids mainly form (Pd-Te, Ru-Rh) metallic particles [1][2][3][4][5] and/or (Rh,Ru)O 2 oxide phases [3][4][5] in the vitreous matrix of high level waste containment glasses. At high concentration, molybdenum oxide tends to demix as a complex molybdate phase enriched mainly in sodium molybdates, calcium and other alkalines (Cs, Li) and alkaline-earth (Ca, Sr, Ba, Mg) [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

A Thermodynamic Approach to Predict the Metallic and Oxide Phases Precipitations in Nuclear Waste Glass Melts

Gossé

Guéneau

Bordier

et al. 2014

Procedia Materials Science

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“…Glass fibers have also been used as the reinforcement in many structural polymer composites . However, there are few cases where glass has been used as the matrix of a conductive composite . Thick film resistors are one exception, where the addition of conductive RuO 2 has been used to vary the resistivity of the resistors beyond what can be achieved using metallic fillers .…”

Section: Introductionmentioning

confidence: 99%

Percolation in Borosilicate Glass Matrix Composites Containing Antimony‐Doped Tin Oxide Segregated Networks. Part II: Examination of Electrical Behavior Using Impedance Spectroscopy

Pruyn

Gerhardt

2014

J. Am. Ceram. Soc.

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Glass nanocomposites, fabricated using borosilicate glass microspheres and antimony tin oxide (ATO) nanoparticles, were previously reported to have formed segregated networks at the boundaries of the glass particles. This resulted in an electrically conducting composite at low volume fractions (~0.5-0.8 vol%) of ATO nanoparticles. The wide range of electrical response in these borosilicate glass composites containing networks of varying concentration of ATO was examined using impedance spectroscopy. The electrical resistance of these composites varied over a range of around 12 orders of magnitude and exhibited several different types of insulator and conductor behavior. The formation of the ATO network was identified and tracked by scanning electron microscopy images and energy dispersive X-ray spectroscopy (EDS) scans. Detailed impedance spectroscopy analysis using all of the dielectric functions (impedance, permittivity, electric modulus, and admittance) was found to be an excellent method for detecting the development of the network and the effect that processing variables can have on its formation and the overall electrical properties of the nanocomposites. F. Zok-contributing editor Manuscript No. 34068.

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Behaviour of ruthenium dioxide particles in borosilicate glasses and melts

Cited by 24 publications

References 28 publications

Electrical Conductivity of RuO₂–Borosilicate Glasses: Effect of the Synthesis Route

Electrical Conductivity of RuO₂–Borosilicate Glasses: Effect of the Synthesis Route

A Thermodynamic Approach to Predict the Metallic and Oxide Phases Precipitations in Nuclear Waste Glass Melts

Percolation in Borosilicate Glass Matrix Composites Containing Antimony‐Doped Tin Oxide Segregated Networks. Part II: Examination of Electrical Behavior Using Impedance Spectroscopy

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Behaviour of ruthenium dioxide particles in borosilicate glasses and melts

Cited by 24 publications

References 28 publications

Electrical Conductivity of RuO2–Borosilicate Glasses: Effect of the Synthesis Route

Electrical Conductivity of RuO2–Borosilicate Glasses: Effect of the Synthesis Route

A Thermodynamic Approach to Predict the Metallic and Oxide Phases Precipitations in Nuclear Waste Glass Melts

Percolation in Borosilicate Glass Matrix Composites Containing Antimony‐Doped Tin Oxide Segregated Networks. Part II: Examination of Electrical Behavior Using Impedance Spectroscopy

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Electrical Conductivity of RuO₂–Borosilicate Glasses: Effect of the Synthesis Route

Electrical Conductivity of RuO₂–Borosilicate Glasses: Effect of the Synthesis Route