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Article
Up-Conversion Luminescence in TbAl3(BO3)4: Yb3+ Syntesized by Solution Combustion Method
Phase pure Tb1–xYbxAl3(BO3)4 (x = 0 – 1) crystalline powders were prepared by the combustion synthesis method. Down-conversion experiments under UV excitation of 375 nm revealed optimal concentration of Yb x = 0....
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Article
STUDY OF PHASE EQUILIBRIA IN THE BaB2O4–BaMoO4–BaF2 SYSTEM
Phase equilibria in the BaB2O4–BaMoO4–BaF2 system are studied by the modified visual polythermal analysis, solid phase synthesis, differential scanning calorimetry, powder XRD, and chemical analysis. The liquidus...
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Article
KBaR(BO3)2 orthoborates (R = REE): Synthesis and study
The search for compounds with the formula composition KBaR(BO3)2 has been performed by solid-phase synthesis and differential thermal analysis. The compounds synthesized in this series are KBaPr(BO3)2 and KBaNd(B...
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Article
Down-Conversion of Short-Wavelength Radiation in LBO Crystal
Comparative model analysis of the possibilities of down-conversion into the terahertz (THz) frequency range of radiation of all-solid-state femtosecond Ti:Sapphire laser systems and hybrid systems based on the...
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Article
Chemical reactions and phase equilibria in BaB2O4-MF (M = Li, N, or K) systems
Chemical processes and phase equilibria in BaB2O4-MF (M = Li, Na, or K) systems were studied. Liquidus curves for these sections were constructed. The primary crystallization field of the low-temperature barium b...
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Article
Growth of lithium triborate (LiB3O5) single crystals in the Li2O-B2O3-MoO3 system
Solubility curves are plotted and optimal solvents for growing lithium triborate (LiB3O5) single crystals are determined. The crystallization range of this compound in the Li2O-B2O3-MoO3 system is refined. The mo...
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Article
Growth of MBO3 (M = La, Y, Sc) and LaSc3(BO3)4 crystals from LiBO2-LiF fluxes
The solubility of rare-earth orthoborates and LaSc3(BO3)4 in LiBO2-LiF solvents has been studied. Spontaneous crystals have been grown and the solvent used has been shown to be attractive for the growth of bulk c...
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Article
Search for compounds of the NaBaR(BO3)2 family (R = La, Nd, Gd, and Yb) and the new NaBaYb(BO3)2 orthoborate
A search for compounds of the NaBaR(BO3)2 composition (where R = La3+, Nd3+, Gd3+, or Yb3+) is performed by solid state synthesis and spontaneous crystallization. A new compound, NaBaYb(BO3)2, is found in this se...
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Article
Effect of mechanical activation on the properties of the working mixture for BaB2O4 and Ba2Na3[B3O6]2F crystal growth
A comparative study is made regarding the effect of the mechanical activation of carbonate acidic (BaCO3-HBO2/H3BO3)2 and carbonate-acidic fluoride (BaCO3-Na2CO3-NaF-(HBO2/H3BO3)2) systems on the thermal synthesi...
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Article
Phase formation in the BaB2O4-BaF2 system
It is shown that the BaB2O4-BaF2 system is quasi-binary with the following eutectics coordinates: 760°C, 59 mol % BaF2, 41 mol % BaB2O4. Due to the intense pyrohydrolysis during the growth of β-BaB2O4 crystals fr...
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Article
Growth of potassium titanyl phosphate crystals using polyphosphate solvents with WO3 additions
The content of WO3 additions to polyphosphate fluxes has been optimized, and crystals have been grown from KTiOPO4-K6P4O13/WO3 and KTiOPO4-K4P2O7/WO3 high-temperature solutions. The crystals have been analyzed fo...
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Article
New nonlinear optical crystals of the M1 − x Sc3 − y Y x + y (BO3)4 (M = Ce, Pr, or Nd) family
New Y0.57M0.72Sc2.71(BO3)4 (M = Pr or Nd) nonlinear optical crystals of the huntite structural type with sp. gr. R32 were grown by the high-temperature solution-melt method. The analogous phase with cerium was pr...
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Article
Phase equilibria and growth of β-BaB2O4 crystals in the BaB2O4-Ba2Na3[B3O6]2F system
A complex investigation of the BaB2O4-Ba2Na3[B3O6]2F cut, which belongs to the ternary mutual Ba, Na//BO2, F (BaB2O4-(NaBO2)2-(NaF)2-BaF2) system, has been performed. The cut is quasibinary, with the following eu...
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Article
Preparation of double Y-Sc orthoborates by means of mechanical activation
Mechanical activation was used to prepare new YSc(BO3)2 and Y3Sc(BO3)4 double borates from the Y2O3-Sc2O3-HBO2 system. The existence of two series of solid solutions of yttrium-scandium borates based on the YBO3 ...
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Article
Thermal expansion and order-disorder polymorphic transformation in the family of borates BaNaMe(BO3)2, Me = Sc, Y
The thermal behavior of BaNaMe(BO3)2, Me = Sc, Y (space group R-3) is studied by the methods of high-temperature X-ray powder diffraction, differential scanning calorimetry, and thermogravimetry in the range from...
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Article
Influence of mechanical activation on the properties of the charge for growing NaBi(WO4)2 and ScBaNa(BO3)2 single crystals
A comparative study was performed on the influence of “pollution-free” mechanical activation (without abrasive-reactive wear of the milling tools of mechanochemical reactors) in oxide-carbonate-acid systems on...
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Article
Thermal conductivity and heat capacity of α- and β-BaB2O4 single crystals
The thermal conductivity of β- and α-BaB2O4 single crystals has been measured at temperatures from 50 to 300 K by a steady-state axial flow technique. The 300-K thermal conductivity of the β-polymorph along and a...
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Article
Phase formation in the BaB2O4-NaBO2-MBO3 (M = Sc, La, Y) system and new orthoborate ScBaNa(BO3)2
Phase formation in the BaB2O4-NaBO2-MBO3 (M = Sc, La, Y) system was studied using solid-phase synthesis, visual polythermal analysis, and spontaneous crystallization. This system was shown to be suitable for grow...
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Article
Phase equilibria in the Ba2Na3[B3O6]2F-BaF2 system
The phase equilibria in the Ba2Na3[B3O6]2F-BaF2 section, which belongs to the ternary mutual Ba, Na//BO2,F system, have been studied by the methods of solid-phase synthesis, visual polythermal analysis, and diffe...
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Article
Phase equilibria in the BaB2O4-NaF system
Phase equilibria in the BaB2O4-NaF system have been studied by a modified visual thermal analysis technique and differential thermal analysis. The phase diagram obtained in this study differs drastically from tha...
