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Issue 20, 2017
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Phase formation, crystal orientations and epitaxy in Bi2O3/TiO2/SiO2(/Nd2O3) glass ceramics

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Abstract

Four glasses in the Bi2O3/TiO2/SiO2 and Bi2O3/TiO2/SiO2/Nd2O3 systems are melted and poured into graphite moulds where they show spontaneous crystallization during cooling. The crystal phases α-Bi2Ti4O11, Bi4−xNdxTi3O12, Bi2Si1−yTiyO5, TiO2 and probably Bi2Ti2O7 are shown to crystallize using X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDXS) and electron backscatter diffraction (EBSD). A previously unknown miscibility of Bi2SiO5 and Bi2TiO5 is indicated. Oriented layers of monoclinic α-Bi2Ti4O11, Bi4−xNdxTi3O12 and Bi2Si1−yTiyO5 are observed. A perfectly epitaxial relationship between Bi4−xNdxTi3O12 and Bi2Si1−yTiyO5 is proven by EBSD. Crystals with the composition Bi2Si1−yTiyO5 with y = 0.33, 0.5 and 0.66 are detected.

Graphical abstract: Phase formation, crystal orientations and epitaxy in Bi2O3/TiO2/SiO2(/Nd2O3) glass ceramics

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Publication details

The article was received on 21 Mar 2017, accepted on 18 Apr 2017 and first published on 19 Apr 2017


Article type: Paper
DOI: 10.1039/C7CE00542C
Citation: CrystEngComm, 2017,19, 2775-2785
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    Phase formation, crystal orientations and epitaxy in Bi2O3/TiO2/SiO2(/Nd2O3) glass ceramics

    W. Wisniewski, S. Slavov, C. Rüssel and Y. Dimitriev, CrystEngComm, 2017, 19, 2775
    DOI: 10.1039/C7CE00542C

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