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Optical basicity

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 … 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.

A New Sulfide Capacity Model for CaO-Al - Wiley Online Library

WebFeb 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 … WebJan 1, 2024 · The optical basicity of prepared glasses decreased with the increasing concentration of lanthanum oxide. Metallization criterion on the basis of refractive index showed an increasing trend while energy band gap based metallization criterion showed a decreasing trend. coterie wedding https://shortcreeksoapworks.com

Oxide ion/electronic polarizability, optical basicity and linear ...

WebFinding 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 ... 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 … For oxides, MO (M = Mg, Ca, Sr, Ba), the basicity moderating parameter of M gover… Arguments are presented justifying the use of fluoride optical basicity values (e.g… The optical basicity trend in alkali borate glasses has been studied in detail [2,13-… The basicity of the oxidic groups AlO 4 5−, SiO 4 4−, PO 4 3−, SO 4 2−, ClO 4 −, ca… The basicity of an oxide glass can be measured experimentally from the frequenc… breatharian deaths

Niobate in silicate and phosphate glasses: Effect of glass basicity …

Category:Optical basicity and refractivity of aluminosilicate glasses

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Optical basicity

Industrial & Engineering Chemistry Research Vol 62, No 14

WebThe study of polarizability, optical basicity, and electric susceptibility carried out on the new and very rare set of bismuth - tellurite glasses doped with Ho 3+ ions were fabricated by the conventional melt quenching process. The non-crystalline nature was confirmed by X-ray diffractometer measurements. Physical properties such as rare earth ... 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.

Optical basicity

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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... WebAug 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.

WebFeb 25, 2002 · The electronic polarizability and optical basicity of La 2 O 3 and related glasses have been determined from ultraviolet absorption spectra and calculations based … 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 …

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 … 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 ),

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 … coter manuaisWebDec 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. breatharian definitionWebMay 26, 2015 · A new sulfide capacity model for CaO-Al 2 O 3 -SiO 2 -MgO slags has been developed based on corrected optical basicity. The present model has taken charge compensation into consideration and postulated that Al exits in the form of [1/2Ca (AlO 4 )] 4– when NCaO is higher than NAl2O3 in slag. coter meaningWebApr 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 … co termed definition contractWebFeb 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 … coterie workloungeWebSep 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. coterie wine new zealandWebApr 12, 2024 · Few reports exist on the effect of the basicity of refining slag on inclusions in 15-5PH stainless steel and its removal efficiency. In this study, the effects of various basicities on the formation and removal efficiency of inclusions in molten steel were investigated. To investigate the effect of the chemical makeup of slag on the non-metallic … coterie worklounge seattle