The effect of mixed La-Y doping on water resistance of phosphate glass

Li, Ao; Hu, Yanhong; Liu, Zhaogang; Zhang, Xiaowei; Deng, Wei; Wang, Hongyuan; Wang, Mitang

doi:10.1016/j.jnoncrysol.2019.119727

Cited by 7 publications

(2 citation statements)

References 53 publications

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“…The conductivity was measured by HIOKI 3522-50lCR testing instrument (HIOKI, Kagoshima, Japan) with experimental test frequency range and the test temperature of 0–100 kHz and 237 °C, respectively. The chemical durability [ 27 , 28 ] was tested by placing bulk samples polished on six sides in a test tube containing 100 mL of high-purity deionized water. After heating in a 90 °C water bath for 48 h, the glass dissolution rate (D r ) and the ionic release concentrations of each ion in the test tube were measured.…”

Section: Experiments Detailsmentioning

confidence: 99%

Influence of Mixed Na2O/K2O on Chemical Durability and Spectral Properties of P2O5-Al2O3-BaO-K2O-Na2O-Nd2O3 Phosphate Glasses

Cheng

et al. 2022

Materials

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A series of 56P2O5-7.5Al2O3-5.9BaO-(28.56-x)K2O-xNa2O-1.51Nd2O3 phosphate glasses with different Na/(Na+K) ratios, which were specially designed for high-power laser application, were prepared by a high-temperature melting method. Except for the density, refractive index, glass transition temperature, and DC conductivity, the chemical durability and spectral properties, as emphasized by high-power and high-energy laser material, were further measured and analyzed. Regarding the chemical durability, the dissolution rates of these glasses do not show an evident mixed alkali effect with increasing the Na/(Na+K) ratio, although the effect is obvious for the glass transition temperature and DC conductivity. To better understand the nature of the dissolution mechanism, the ionic release concentrations of every element are determined. Both Na and K undergo ion exchange, but the ion exchange rate of K is much larger than that of Na. In terms of the spectral properties, the J–O parameters, emission cross-section, radiation lifetime, fluorescence lifetime, effective bandwidth, fluorescence branching ratio, and quantum efficiency are determined from absorption and emission spectra. The trend of Ω2 deviating from linearity indicates that the coordination environment symmetry of Nd3+ ions and the covalence of Nd-O also present an evident mixed alkali effect. The most important finding is that the emission cross-section and fluorescence lifetime of Nd3+ ions at 1053 nm were not affected by the change in the Na/K ratio. According to the above experimental results, the optimized value of the Na/K ratio was determined, based on which the 56P2O5-7.5Al2O3-5.9BaO-(28.56-x)K2O-xNa2O-1.51Nd2O3 glass maintains a high emission cross-section with good chemical durability.

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Section: Experiments Detailsmentioning

confidence: 99%

Influence of Mixed Na2O/K2O on Chemical Durability and Spectral Properties of P2O5-Al2O3-BaO-K2O-Na2O-Nd2O3 Phosphate Glasses

Cheng

et al. 2022

Materials

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“…Suryanarayanan et al [ 19 ] studied the influence of trimethylamine on the anodic behavior of Ni, Cu, and Ni‐Cu alloys exposed to fluoride media indicating that the anodic dissolution and film precipitation of these metals can be explained through the LPRM. Li et al [ 20 ] reported that the Fe 78 Si 9 B 13 metallic glass alloys exposed to a saline environment show that the formation of insoluble products on the metallic surface is under ohmic control. Chauque et al [ 21 ] studied the formation of lithium titanate for application as anodes in lithium‐ion batteries showing the linear variation of current and potential with the scan rate which indicates the formation of resistive films on the electrode surface.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the kinetic growth of an electrochemically formed bronze patina using the layer‐pore resistance model

González-Parra

Bañuelos

Covelo

et al. 2023

Materials & Corrosion

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The growth of patinas on artistic or archeological copper alloys is a determining stage to reproduce similar surface conditions such as corrosion protection of cultural heritage materials. In this work, the kinetic growth and protective properties of the corrosion products layer of a quaternary copper alloy have been characterized using linear sweep voltammetry (LSV), electrochemical impedance spectroscopy (EIS), scanning electron microscopy‐EDS, atomic force microscopy, X‐ray diffraction, and Raman spectroscopy. The results of LSV show that the patina formation is a mixed process consisting of dissolution and direct film formation. EIS results show that the kinetic formation modifies the characteristics of the corrosion layer allowing a Warburg‐like diffusive mechanism or the response of a porous oxide layer without diffusive phenomena. The roughness and thickness of the patina enhance with the decrease in the scan rate. The patina is mainly composed of copper and tin corrosion products.

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