Electron backscatter diffraction of BaAl2B2O7 crystals grown from the surface of a BaO·Al2O3·B2O3 glass

Oriented Nucleation of both Ge-Fresnoite and Benitoite/BaGe4O9 during the Surface Crystallisation of Glass Studied by Electron Backscatter Diffraction

“…For example, the observation of oriented nucleation in these glass-ceramics3839404142, also observed e.g. during the crystallization of a BaO·Al 2 O 3 ·B 2 O 3 glass43, challenges the basic assumption of oriented nucleation in the classic nucleation theory for glasses. It must not be confused with the oriented growth of crystals in glasses which has been known for many years.…”

“…001 textures have also been indicated by XRD in BTS4041 and STS38 glass-ceramics, but the application of EBSD showed that the topmost layer shows a different orientation in the case of BTS40 which is affected by the annealing temperature40. Actually, the analysis of surface crystallized STS from the composition STS+0.45 SiO 2 provided the first case where the texture detected at the immediate surface also prevailed during growth39 while a texture change is observed more often33404243. Hence the assumption of a randomly oriented nucleation in BTG24 must be questioned.…”

Thermal expansion behavior in the solid solution series BaMg2−xCoxSi2O7 (0≤x≤2), studied by dilatometry and in situ high-temperature X-ray diffraction

“…certain crystallographic directions have a preferred orientation [16][17][18]. This has already been reported, especially from glasses, showing surface crystallization [19][20][21][22]. So it is highly possible that there are oriented structures at the interface between the glass ceramics and the adherent materials in an SOFC.…”

Analysis of the cordierite X-phase and phase transformation by electron backscatter diffraction (EBSD)

“…The numbered crystals highlight "regular hexagons" (1, 2) and "elongated hexagons" (3)(4)(5). The orientations of the numbered crystals are visualized by the corresponding unit cell wire frames and the Euler Angles given in Table 1.…”

“…with piezoelectric properties in the case of fresnoite [1,2]. The main mystery of this process is the surface nucleation itself, which has recently been realized to be more complicated than previously thought as oriented nucleation has been shown to occur in a number of surface crystallizing glass systems [1][2][3][4][5][6].…”