Oriented surface nucleation in inorganic glasses – A review

Wisniewski, Wolfgang; Rüssel, Christian

doi:10.1016/j.pmatsci.2020.100758

Cited by 24 publications

(25 citation statements)

References 96 publications

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“…If the laser scanning direction is changed, then there is the potential for new grains to nucleate and out compete the previous lattice orientation. This model is very similar to the growth (kinetic) selection model used to explain oriented crystals in surface crystallized glass-ceramics 81,82 and the noncrystallographic branching mechanism from Figure 1D governing spherulitic crystal growth. 5 Distinguishing an abrupt change in lattice orientation as a grain boundary or gradual change as lattice curvature depends on the angular resolution of the characterization technique.…”

Section: Preferred Crystallographic Growth Directionmentioning

confidence: 71%

“…There is also a strong surface dependence in laser-fabricated Sb 2 S 3 , which confined another crystal axis pointing surface normal. 113,116 This follows the oriented nucleation mechanism 82 and may be due to the surface relieving stresses inhibiting crystallization, favoring the fastest growth direction, in the plane of the glass surface or more generally by the anisotropy associated with the glass surface compared to bulk.…”

Section: Light Polarizationmentioning

confidence: 98%

“…81 Such methods include plastically extruding a partially crystallized glass, 99,100 electrochemically inducing nucleation [101][102][103] or by careful growth of surface nucleated glasses. 82,104,105 Surface nucleation can be further broken into two types shown schematically in Figure 19 for: (A) thermodynamic-controlled where nuclei formation is biased by the glass surface and (B) kineticcontrolled where the optimally oriented grains grow faster and dominate the material volume far from the glass surface. Kinetic-controlled is very similar to the mechanism proposed by Gupta et al 80…”

Section: Oriented Crystal Growth In Glass-ceramicsmentioning

confidence: 99%

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Curved lattices of crystals formed in glass

Musterman

Dierolf

Jain

2022

Int J of Appl Glass Sci

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Atomic arrangements systemically deviating from the classic definition of single crystal lattice have been known in spherulites for over a century. However, their unusual curved lattice could not be exploited for useful applications due to their uncontrolled orientations and lattice curvatures. Heating of glass with focused laser, electron, or X-ray beam has yielded well-defined conditions for forming single crystal architectures. Furthermore, by controlling the conditions of irradiation and confinement by glass matrix for a given system, desired lattice curvature (rotations and twists) can be reproducibly introduced into these crystals. Here, we review several examples of laser-fabricated crystals with curved lattices in glass using a common coordinate system, which helps to establish correlations between processing parameters and lattice curvature. The mechanisms of lattice deformations are discussed along with potential methods to control the orientation of the initially formed seeds that determine the lattice orientations of the end product. The recent developments of laser-fabrication of single crystal architectures in glass with controlled heating profile appear promising for engineering the curvature of their lattices.

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Section: Preferred Crystallographic Growth Directionmentioning

confidence: 71%

Section: Light Polarizationmentioning

confidence: 98%

Section: Oriented Crystal Growth In Glass-ceramicsmentioning

confidence: 99%

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Curved lattices of crystals formed in glass

Musterman

Dierolf

Jain

2022

Int J of Appl Glass Sci

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“…At the surface, a preferential orientation of the (00l) plans is usually observed but is rarely kept in the bulk [ 44 ]. Wisniewski et al explain the preferential orientation of the plans at the surface from the crystal structure and the diffusion rates of the atoms in the parent glass [ 45 ]. The lattice planes with the highest number of network formers per area are parallel to the surfaces.…”

Section: Discussionmentioning

confidence: 99%

Effect of Partial Ba Substitutions on the Crystallization of Sr2TiSi2O8 (STS) Glass–Ceramics and on the Generation of a SAW Signal at High Temperatures

et al. 2021

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Because of their characteristics, including a d33 of 10–15 pC/N and high stability up to temperatures over 1000 °C, polar glass–ceramics containing fresnoite crystals can be regarded as highly effective materials for applications requiring piezoelectricity at high temperatures. In the present paper we investigate barium substitutions in an Sr-fresnoite (STS) glass–ceramic. Two aspects are studied: first, the effect of the substitution on the preferential orientation of the crystallization, and second, the ability of the glass–ceramics to generate and propagate surface acoustic waves (SAW) at high temperatures. XRD analyses show that a 10 at.% substitution of Ba allows us to keep a strong preferential orientation of the (00l) planes of the fresnoite crystals down to more than 1 mm below the surfaces. Higher substitution levels (25 and 50 at.%), induce a non-oriented volume crystallization mechanism that competes with the surface mechanism. SAW devices were fabricated from glass–ceramic substrates with 0, 10 and 25 at.% Ba substitutions. Temperature testing reveals the high stability of the frequency and delay for all of these devices. The glass–ceramic with a 10 at.% Ba substitution gives the strongest amplitude of the SAW signal. This is attributed to the high (00l) preferential orientation and the absence of disoriented volume crystallization.

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“…WolfgangWisniewski 1,2* , Michael J. Pitcher 1 , Emmanuel Veron 1 , Jintai Fan 1,3 , Vincent Sarou-Kanian 1 , Franck Fayon 1 and Mathieu Allix 1 1 CNRS, CEMHTI UPR3079, Univ. Orléans, F-45071 Orléans, France.…”

Section: Author Contributionsmentioning

confidence: 99%

Macroscopic Orientation Domains Grown via Aerodynamic Levitation: A Path toward Single Crystals

Wisniewski

Pitcher

Véron

et al. 2021

Crystal Growth & Design

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Powder pellets of ca. 30 mg with the mol% composition 0.61Ga2O30.39La2O3 are levitated in a gas stream and melted using a pair of CO2 lasers. The levitating melt droplets crystallize to form La2Ga3O7.5 or LaGaO3 after the lasers are turned off. The microstructure of cross sections prepared from them is analyzed using scanning electron microscopy (SEM) and electron backscatter diffraction (EBSD).One of the beads containing La2Ga3O7.5 shows a fully crystallized, polycrystalline microstructure while the other broke apart during cooling and its cross section shows only a single orientation domain which is more than 7 mm 2 in area. Solid-state 71 Ga NMR spectroscopy was applied to this sample and showed that it was not a single crystal but contains 2 only about 3 orientation domains. The bead containing LaGaO3 showed dendritic growth originating from multiple nuclei.Although a single crystal was not achieved by the applied experiments so far, a detailed correlation of measured cooling curves with the observed microstructures enables to devise steps along the path towards single crystal production in future experiments.

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Oriented surface nucleation in inorganic glasses – A review

Cited by 24 publications

References 96 publications

Curved lattices of crystals formed in glass

Curved lattices of crystals formed in glass

Effect of Partial Ba Substitutions on the Crystallization of Sr2TiSi2O8 (STS) Glass–Ceramics and on the Generation of a SAW Signal at High Temperatures

Macroscopic Orientation Domains Grown via Aerodynamic Levitation: A Path toward Single Crystals

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