Phase separation during the melting of oxide borates LnCa4O(BO3)3 (Ln=Y, Gd)
Source abstract
Abstract
Abstract GdCa 4 O(BO 3 ) 3 (GdCOB) and YCa 4 O(BO 3 ) 3 (YCOB) single crystals have been grown from the melt by the Czochralski method. Subsequent DTA analysis of the single crystals showed different behavior for both substances. During the first heating both crystals showed a single sharp melting peak at 1490°C (GdCOB) or at 1504°C (YCOB), respectively. In subsequent heating/cooling runs only GdCOB shows one single peak, whereas YCOB shows five peaks. Moreover, phase separation of the melt can be observed by optical observation and by EDX measurements. This behavior can be explained by a miscibility gap in the YCOB melt. The YCOB crystal is formed from the stoichiometric melt by a monotectic reaction.
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Research context
OpenAlex topics: Crystal Structures and Properties · High-pressure geophysics and materials · Advanced Condensed Matter Physics
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References (20)
Show source-provided references
1. Growth and noncritical phase-matching third-harmonic-generation of GdxY1−xCa4O(BO3)3 crystal10.1016/S0022-0248(00)00393-6 ↗
2. Spectroscopic properties and laser performances of Yb:YCOB and potential of the Yb:LaCOB material10.1016/S0925-3467(00)00075-6 ↗
3. Nonlinear optical properties of LaCa4O(BO3)310.1364/OL.26.000217 ↗
4. T.N. Khamaganova, V.K. Trunov, B.F. Dzhurinskii, Crystalline compound calcium samarium double oxoborate Sm2Ca8O2(BO3)6, Z. Neorg. Chim. 36 (1991) 855–857 (in Russian). English translation in: Russ. J. Inorg. Chem. 36 (1991) 484.
5. Structural and thermal stability of Czochralski grown GdCOB oxoborate single crystals10.1039/a800492g ↗
6. Crystal structures of double oxoborates LnCa4O(BO3)3 (Ln = Gd, Tb, Lu) and Eu2CaO(BO3)2
7. Crystal growth and optical characterization of rare-earth (Re) calcium oxyborate ReCa4O(BO3)3 (Re = Y or Gd) as new nonlinear optical material10.1143/JJAP.36.L276 ↗
8. Growth and optical properties of ErCa4O(BO3)3 crystals10.1016/S0022-0248(01)01765-1 ↗
9. Non-critical phase matching of GdxY1−xCa4O(BO3)3 (GdxY1−xCOB) crystal10.1016/S0038-1098(01)00403-3 ↗
10. Crystal growth of YCa4O(BO3)3 and its orientation10.1016/S0022-0248(98)00947-6 ↗
11. Linear- and nonlinear-optical properties of a new gadolinium calcium oxoborate crystal, Ca4GdO(BO3)310.1364/JOSAB.14.002238 ↗
12. Crystal growth and characterization of GdxY1−xCa4O(BO3)3 crystal10.1016/S0022-0248(98)01081-1 ↗
13. P. Paufler, Phasendiagramme, Akademie-Verlag, Berlin, 1981 (in German).10.1007/978-3-322-86071-2 ↗
14. Optical properties of color centers in calcium-stabilized gadolinium gallium garnets10.1103/PhysRevB.43.1787 ↗
15. K. Petermann, Private communication.
16. Phase relations in the system Y2O3–CaO–B2O310.1016/S0925-8388(01)01556-0 ↗
17. E.M. Levin, H.F. McMurdie, Phase Diagrams for Ceramists, National Bureau of Standards, Diagram No. 234.
18. Top-seeded growth and morphology of La2CaB10O19 crystals10.1016/S0022-0248(01)01927-3 ↗
19. Czochralski growth of six Yb-doped double borate and silicate laser materials10.1016/S0022-0248(01)01565-2 ↗
20. E.M. Levin, H.F. McMurdie, Phase Diagrams for Ceramists, National Bureau of Standards, Diagrams No. 4381–4391.