Optical basicity

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August undefined, 2024

WebThe gamma and A values allow the basicity of a glass composed of these oxides to be expressed numerically on the optical basicity scale. Data that are available for phosphate glasses include all the rare earth ions (except Pm3+) and indicate a very irregular trend in gamma, but with an overall increase from La3+ to Lu3+ (which has gamma=1.03 ... WebJun 25, 2024 · The optical basicity of the glass has been estimated and it has the values from 1.11 to 1.31 with varying vanadium content from zero to 5 mol%. Static dielectric …

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WebMar 16, 2024 · Transmetalation is accompanied by relevant optical absorption changes and quenching of the fluorescence emission, leading to high selectivity and sensitivity of the chemosensor, with the advantage of not requiring any sample pretreatment or pH adjustment. ... Transmetalation is strongly influenced from the Lewis basicity of the … WebDec 2, 2014 · Optical basicity depends on the electronegativity of the ions of an individual oxide. This feature represents the bonding characteristics, ionization ability, ion size, and consequently the mobility of free ions inside the slag. These properties affect the electrical conductivity of slags. the queen\\u0027s gambit mycima

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WebThe concept of optical basicity (Λ) is particularly suited to binary oxides and oxidic network materials such as silicates to characterize the acid–base nature of glasses and melts and to account for the complexation of metal cations by a variety of anionic frameworks. WebOct 5, 2009 · The results showed that an increase of the calculated optical basicity was related to an increased number of bubbles in the glass samples. The oxygen activity in the melt during fining decreased with increased optical basicity. Document Type: Research Article. Publication date: 01 October 2009. WebJul 17, 2024 · The optical basicity of present glasses are also estimated. Moreover, we studied many desirable features such as density, molar volume, oxygen packing density and the average phosphorus–phosphorus distance. sign in suncorp candidate

$The refractivity and optical basicity of glass - ScienceDirect$

Optical basicity and electronic polarizability of zinc …

WebJun 7, 2024 · The main reason is that the optical basicity of transition metal oxides cannot be directly measured because the own d orbitals of cations are involved and because their metal-oxygen bonds have an... WebApr 15, 2007 · This relationship presents a general trend toward an increase in the oxide ion polarizability with increase in optical basicity. The Λ values estimated from α O 2-using Eq. (6) are given in Table 1 (columns 9–10). Large α O 2-(n) values over 2 Å 3 and large Λ values over 1.0 are obtained. That is, the rare earth oxides showing electronic polarizability … sign in suny downstateWebJun 25, 2024 · Basicity, polarizability, electronegativity and some physical constants are determined depending on experimental results. Also, the refractive index and optical band gap are calculated depending on the theoretical optical basicity and molar refractivity. the queen\u0027s gambit music

"WebOct 10, 2024 · Optical basicity is identified as the average electron donor power of a fluorinated or oxidic compound (Herrmann et al., 2015). For a glass system consisting of … " - Optical basicity

Optical basicity

$Optical Basicity and Refractivity of Germanate Glasses$

WebApr 12, 2024 · The present research provided excellent dispersion of a thin film composite membrane with high power density, excellent long-term performance stability, and good mechanical durability for salinity gradient energy generation. Sulfonated polymers and graphene nanosheets provide an essential platform for the development cost-effective … WebThe optical basicity Λ has been evaluated depends on the optical band gap and the refractive indexdata for two different ternary glass systems. Also the uncertainty of Λ in the two cases was estimated, hence we can predict …

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WebThe physical, optical, and gamma ray shielding capabilities of the B 2 O 3-Bi 2 O 3-MoO 3 glass system have been evaluated. The optical basicity of the current samples rises from 0.781 to 0.897 with increasing Bi 2 O 3 concentration. The values of refractive index, dielectric constant and optical dielectric constant show uptrend and lies in the range of … WebOct 10, 2024 · Optical basicity is identified as the average electron donor power of a fluorinated or oxidic compound ( Herrmann et al., 2015 ). For a glass system consisting of fluorinated and oxidic compounds, the optical basicity can be estimated based on Duffy's empirical formula ( Sontakke and Annapurna, 2012; Zheng et al., 2014; Guo et al., 2024 ),

WebThe optical basicity of the manufactured glass samples is increased from 0.577 to 0.862, which is a significant improvement. As the quantity of oxygen atoms in the produced glass samples diminishes, the oxygen packing density varies between 102.978 and 78.351, depending on the sample size. The energy of the optical band gap ranges between 3.878 ... WebRefractivity data for aluminosilicate glasses (densities and refractive indices) have been used to examine the relationship between oxygen polarisability, alpha (O2-), and optical basicity, and also to calculate the basicity moderating parameter of …

WebThis study explored a technical approach that can reduce the basicity of lignin-based biochar by utilizing FeCl 3 during production of ... USA). The concentration of As(V) was analyzed using an inductively coupled plasma/optical emission spectrometry (ICP/OES, Optima 5300 DV, PerkinElmer, USA). The reusability test was conducted in five ... WebTo account for selectivity as a general concept that allows the classiﬁcation of reactions, it would be necessary to have available parameters accounting for a similar type of …

WebIt is shown that optical basicity avoids the confusion that can arise from the use of empirical basicity ratios, particularly with regard to the effect of magnesia, and in addition, facilitates...

WebApr 28, 2024 · The optical basicity follows the same trend as the electronic polarizability, which can be attributed to the more acidic nature of P 2 O 3 compared with TiO 2. Moreover, the decrease of the optical basicity with increasing TiO 2 content supports the low ability of TiO 2 compared with P 2 O 5 to transfer electrons to the surrounding cations. the queen\u0027s gambit miniseries castWebThe concept of optical basicities initially developed by Duffy for solid oxides was successfully transferred to low melting salts such as ionic liquids (ILs). Several ionic … the queen\u0027s gambit movie trailerWebSep 1, 1986 · The optical basicity trend in alkali borate glasses has been studied in detail [2,13-16], and probe ion spectroscopy has revealed the existence of sites with basicities significantly above the average at compositions of approximately 30% Na20 and above. the queen\\u0027s gambit mr shaibelWebFeb 13, 2024 · However, whilst optical basicity can provide useful empirical correlations (e.g. sulphide capacity of ladle slags ), these values have not been successfully linked to … the queen\u0027s gambit move in chessWebAug 9, 2024 · The Figure S1b presents the optical basicity behavior for SixMg, SixCa, SixNNa, and SixNLiNa glasses in a higher magnification. The optical basicity is found for all silicate glasses to increase approximately linearly with total modifier content, while pyrophosphate glasses appear to partially deviate from this trend. sign in sxuWebFeb 1, 2024 · The concept of optical basicity (Λ) is particularly suited to binary oxides and oxidic network materials such as silicates to characterize the acid–base nature of glasses … sign in sussexWebFinding a parameter of the same type for solid oxides was not so easy. Modern theories of reactivity propose to consider the oxidizing power, acidity, basicity, and reducing power, as steps along a same continuum, instead of distinct phenomena [3]. Among parameters, Zhang’s scale of electronegativity [4], optical electronegativity and optical ... sign in surveymonkey