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Crystal growth of La2SrB10O19 from undercooled melt

Abstract

The crystal growth rate of La2SrB10O19 in an undercooled melt of stoichiometric composition was studied. The crystallization of the bulk samples was performed in a single-stage regime under isothermal conditions at the selected temperatures for the different time periods. The surface crystallization was observed and in all crystallized samples, the La2SrB10O19 crystalline phase was identified. Based on the dependence of the crystalline layer thickness on treatment time at selected temperature, crystal growth rate was obtained. The crystal growth rates were from 1.65 × 10−8 to 2.77 × 10−7 m s−1 in the temperature interval (700–780 °C). The experimental values were compared to the calculated values using theoretical model of the crystal growth. The experimental growth rate followed the same trend as the calculated growth rate, but the experimental values were higher than the calculated.

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Acknowledgements

This work was supported by the Ministry of Education, Science and Technological Development of the Republic of Serbia (Contract No. 451-03-68/2020-14/200135 and 451-03-68/2020-14/200023).

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Correspondence to Sonja V. Smiljanić.

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Smiljanić, S.V., Grujić, S.R., Matijašević, S. et al. Crystal growth of La2SrB10O19 from undercooled melt. J Therm Anal Calorim 146, 1569–1576 (2021). https://doi.org/10.1007/s10973-020-10122-1

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Keywords

  • Glass
  • Crystal growth
  • Surface crystallization
  • FESEM