Electrical properties of (Na2O)35.7(RE2O3)7.2(GeO2)57.1 (RE=Sm, Gd, Dy, Y, Ho, Er and Yb) glasses

Aung, Yan Lin; Itani, Kazunari; Asahi, Taro; Kiyono, Hajime; Sakamoto, Masatomi; Nakayama, Susumu

doi:10.1016/j.matchemphys.2007.10.026

Cited by 7 publications

(3 citation statements)

References 14 publications

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“…Usually, samples are polished on both sides and thin layers of metal are deposited as electrodes to improve the electrical contact [8,9]. The most popular metals, which serve as electrode materials, are silver [8,[10][11][12][13][14][15], gold [15][16][17][18][19], and less often platinum [9]. Silver is sometimes applied in the form of a paste on the sample surfaces and is known to tend to agglomerate during being annealed in an air or oxygen atmosphere [20].…”

Section: Introductionmentioning

confidence: 99%

The Influence of Thin Gold Electrodes on the High-Temperature Impedance of Oxide Glasses

Wójcik

Barczyński

2022

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The influence of thin gold electrodes on the electrical measurements of glasses at high temperatures was studied using impedance spectroscopy. The impedance was measured several times over a wide frequency range from 10 mHz to 1 MHz and the temperature ranged from 213 to 673 K under air and nitrogen atmospheres. The results showed a drop in the conductivity of more than an order of magnitude at a temperature around 603 K during heating. An additional relaxation process was found at the low-frequency region. The occurred process was correlated with the thermal disintegration of the gold nano-layer used as an improvement in the electrical contact. The possible ambiguous interpretation of high-temperature impedance spectra was presented as a consequence of performing the electrical measurements only during heating or cooling while using unstable thin gold electrodes. Moreover, a possible solution to this problem was proposed.

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Section: Introductionmentioning

confidence: 99%

The Influence of Thin Gold Electrodes on the High-Temperature Impedance of Oxide Glasses

Wójcik

Barczyński

2022

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“…We remained optimistic that glass compositional optimization could produce materials with sufficient ionic conductivity for ion sensor detection electrodes and water stability for aqueous operating conditions. Previously, we have prepared a series of glasses, (R 2 O) 35.7 (RE 2 O 3 ) 7.2 (SiO 2 ) 57.1 (R: Li, Na, K), 9)11) (Na 2 O) 35.7 (RE 2 O 3 ) 7.2 (GeO 2 ) 57.1 , 12) and (Na 2 O) 35.7 (RE 2 O 3 ) 7.2 (B 2 O 3 ) 57.1 , 13) and investigated their ionic conductivity, and showed changes in water stability for Na 2 OSiO 2 glasses with changes in Y 2 O 3 content. 14) In this work, we evaluated local Na environment, conductivity, and water stability for glasses featuring divalent alkaline earth metal (M: Mg, Ca, Sr, Ba) replacements for trivalent Y, namely, (Na…”

Section: Introductionmentioning

confidence: 99%

Na environment, conductivity, and water leaching of sodium alkaline earth silicate glass

Nakayama,

Asahi,

Kiyono

2023

J. Ceram. Soc. Japan

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Na 2 O) 35.7 (MO) 7.2 (SiO 2 ) 57.1 and (Na 2 O) 33.7 (MO) 13.3 (SiO 2 ) 53.4 glass materials that feature alkaline earth metals (M = Mg, Ca, Sr, Ba) were evaluated as Na + conducting materials. Following glass synthesis from the melt under air at 1350 °C, Na environments, conductivity, and water leaching were investigated. 23 Na NMR spectrometry indicated NaO distances decreased in the order M = Mg > Ca > Sr > Ba. The conductivities and activation energies of conduction respectively decreased and increased slightly in the order M = Mg, Ca, Sr, and Ba. Regardless of M, the conductivities and activation energies of conduction of (Na 2 O) 33.7 (MO) 13.3 (SiO 2 ) 53.4 were lower and higher, respectively, than those of (Na 2 O) 35.7 (MO) 7.2 (SiO 2 ) 57.1 . Na leaching into water decreased in the order Ca < Mg < Sr < Ba. For each M, (Na 2 O) 33.7 (MO) 13.3 (SiO 2 ) 53.4 was more resistant to leaching than (Na 2 O) 35.7 (MO) 7.2 (SiO 2 ) 57.1 .

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“…Yamashita et al found that Na 5 REP 0.34 -Si 2.7 O 9 (Narpsio) glass ceramics, which have similar structures as that of NaRESi 4 O 12 , have a conductivity of 1 Â 10 À 1 S cm À 1 at 300 1C, which is high compared with β-alumina or NASICONs [5]. They investigated the thermal and electrical properties of glass based on Na 5 [6][7][8][9]. Among these, Li 2 O-Y 2 O 3 -SiO 2 glass has the requisite properties for use in solid-state pH sensors [10].…”

Section: Introductionmentioning

confidence: 99%

Influence of yttrium component on water corrosion resistance of sodium ion conducting silicate glass

Kiyono

Maruoka

Asahi

et al. 2015

Ceramics International

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Electrical properties of (Na2O)35.7(RE2O3)7.2(GeO2)57.1 (RE=Sm, Gd, Dy, Y, Ho, Er and Yb) glasses

Cited by 7 publications

References 14 publications

The Influence of Thin Gold Electrodes on the High-Temperature Impedance of Oxide Glasses

The Influence of Thin Gold Electrodes on the High-Temperature Impedance of Oxide Glasses

Na environment, conductivity, and water leaching of sodium alkaline earth silicate glass

Influence of yttrium component on water corrosion resistance of sodium ion conducting silicate glass

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