Surface stability of lithium triborate crystals grown from excess B2O3 solutions

Brück, E.H.; Raymakers, R.J.; Route, R.; FeigeIson, R.S.

doi:10.1016/s0022-0248(07)80073-x

Cited by 15 publications

(7 citation statements)

References 8 publications

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“…However, in these conditions, for a semiconducting oxide like Nb 2 O 5 , oxygen depletion easily occurs and metallic Nb is thus partially oxidized by the released oxygen (Reactions 4 and 5 ). Similar effects were also reported for Mg–Ng–O compounds 16 . …”

Section: Resultssupporting

confidence: 87%

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Synthetic approach of ternary magnesium niobate (Mg–Nb–O) compounds

Rahman¹

2021

Sci Rep

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Magnesium based niobium oxides (Mg–Nb–O) were prepared by solid-state reactions owing to understand the function of transition metal oxides as promoters/catalysts for practical application. Magnesium niobate (Mg3Nb6O11) was synthesized for the first time in nearly pure form reported in this context. MgNb2O6 and Mg4Nb2O9 were prepared in oxidizing conditions; on the contrary, Mg3Nb6O11 preferred reducing environment. Stoichiometric mixtures of the precursor materials MgO, Nb2O5 and/or metallic Nb were annealed for the syntheses which revealed the effect of temperature on phase formation, reaction kinetics and heat of reaction. The products were examined by ex-situ, in-situ X-ray diffraction (XRD) and differential scanning calorimetry (DSC). Crystallographic parameters of various binary and ternary compounds (Mg/Nb/O) formed in different calcination conditions, were extracted by Rietveld method. In-situ experiment results in single step reaction for the MgNb2O6 synthesis and the heat of formation of the solid-state reaction obtained to be minimum (93 kJ/mol). In contrast, the formation of Mg4Nb2O9 and Mg3Nb6O11 compounds towards pure phases rather complicated due to multistep reactions and corresponding heat of formation were estimated to be 140 and 190 kJ/mol. Experimental results have been discussed based on kinetic and thermodynamic constrains.

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Section: Resultssupporting

confidence: 87%

“…A number of possibilities for the formation of binary and ternary compounds with various oxidation states of Nb are available in the literatures 16 – 25 . Abbattista et al 26 obtained an orthorhombic phase of MgNb 2 O 3.6 from reduction of MgNb 2 O 6 .…”

Section: Introductionmentioning

confidence: 99%

Synthetic approach of ternary magnesium niobate (Mg–Nb–O) compounds

Rahman¹

2021

Sci Rep

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“…Similar studies have earlier been reported in HTS-grown KTP family crystals [8,9]. Although several researchers have studied the solubility of LBO with various solvents [10,11], reports on the crystallization parameters of LBO are scarce. In the present study, nucleation parameters of LBO with various solvents (self and molybdate) have been deduced from the solubility data, and it was found that B 2 O 3 solvent yields more stability to the solution than that of MoO 3 modified solvent.…”

Section: Introductionsupporting

confidence: 81%

Nucleation, growth and characterization of LiB3O5 single crystals

Kannan

Kimura

Miyazaki

et al. 2005

Journal of Crystal Growth

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“…Other related investigations, including on the nucleation thermodynamics of the Li 2 O-B 2 O 3 system, the physical properties of the LBO-B 2 O 3 melt, the surface stability of the LBO crystal, critical growth parameters, post-growth thermal treatment, crystal morphology, and crystal defects, have also been carried out, and some important results have been obtained [112][113][114][115][116][117][118][119][120][121][122]. Other related investigations, including on the nucleation thermodynamics of the Li 2 O-B 2 O 3 system, the physical properties of the LBO-B 2 O 3 melt, the surface stability of the LBO crystal, critical growth parameters, post-growth thermal treatment, crystal morphology, and crystal defects, have also been carried out, and some important results have been obtained [112][113][114][115][116][117][118][119][120][121][122].…”

Section: Lithium Triborate (Lib 3 O 5 or Lbo)mentioning

confidence: 99%