Flux growth utilizing the reaction between flux and crucible

Yan, J. -Q.

doi:10.1016/j.jcrysgro.2015.01.017

Title: Flux growth utilizing the reaction between flux and crucible

Journal Article · Thu Jan 22 00:00:00 EST 2015 · Journal of Crystal Growth

DOI:https://doi.org/10.1016/j.jcrysgro.2015.01.017· OSTI ID:1185841

Yan, J. -Q. ^[1]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)

Flux growth involves dissolving the components of the target compound in an appropriate flux at high temperatures and then crystallizing under supersaturation controlled by cooling or evaporating the flux. A refractory crucible is generally used to contain the high temperature melt. Moreover, the reaction between the melt and crucible materials can modify the composition of the melt, which typically results in growth failure, or contaminates the crystals. Thus one principle in designing a flux growth is to select suitable flux and crucible materials thus to avoid any reaction between them. In this paper, we review two cases of flux growth in which the reaction between flux and Al₂O₃ crucible tunes the oxygen content in the melt and helps the crystallization of desired compositions. For the case of La₅Pb₃O, the Al₂O₃ crucible oxidizes La to form a passivating La₂O₃ layer which not only prevents further oxidization of La in the melt but also provides [O] to the melt. Finally, in the case of La_0.4Na_0.6Fe₂As₂, it is believed that the Al₂O₃ crucible reacts with NaAsO₂ and the reaction consumes oxygen in the melt thus maintaining an oxygen-free environment.

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Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1185841

Alternate ID(s):: OSTI ID: 1246403

Journal Information:: Journal of Crystal Growth, Vol. 416, Issue C; ISSN 0022-0248

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 8 works

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Cited By (2)

Magnetic order of Nd ₅ Pb ₃ single crystals Yan, J-Q; Ochi, M.; Cao, H. B. Journal of Physics: Condensed Matter, Vol. 30, Issue 13 https://doi.org/10.1088/1361-648x/aaaf3e	journal	March 2018
Flux growth in a horizontal configuration: an analogue to vapor transport growth Yan, J. -Q.; Sales, B. C.; Susner, M. A. arXiv https://doi.org/10.48550/arxiv.1706.02339	text	January 2017

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