Influence of amorphous phase separation on the crystallization behavior of glass-ceramics in the BaO–TiO2–SiO2 system

Boulay, Emilie; Ragoen, Céline; Idrissi, Hosni; Schryvers, D.; Godet, Stéphane

doi:10.1016/j.jnoncrysol.2013.06.023

Cited by 13 publications

(14 citation statements)

References 24 publications

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“…750 ± 5 °C. 12 Furthermore, various crystal growth mechanisms of fresnoites have been reported ranging from polygon growth in stoichiometric BTS-glass 12,24 to dendritic growth in BT0.75S and a mechanism proposed to be viscose fingering in a glass of the composition ST0.75S where Sr-fresnoite crystallized from the surface. 25 The growth of the hexagonal phase Sr 0.75 Al 1.5 -Si 0.5 O 4 in a glass of that same composition 20 remarkable similarities to the growth of Sr-fresnoite in the ST0.75S-glass.…”

Section: ■ Introductionmentioning

confidence: 99%

Oriented Nucleation and Crystal Growth of Ba-Fresnoite (Ba₂TiSi₂O₈) in 2 BaO·TiO₂·2 SiO₂ Glasses with Additional SiO₂

Wisniewski

Döhler

Rüssel

2018

Crystal Growth & Design

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Glasses of the mol composition 2 BaO·TiO2·2 SiO2 + x SiO2 (with x = 0.0, 0.1, 0.2, 0.5, 0.75, 1.5, 2.0, and 3.0 mol) were prepared, polished, and crystallized at 810 °C for 5 h or more. All glasses showed the sole crystallization of Ba-fresnoite (Ba2TiSi2O8). The crystal orientations at the immediate surfaces were analyzed by EBSD and showed that all glasses exhibit a nonrandom orientation distribution, i.e., oriented nucleation at the surface. While the glasses with x = 0.0, 0.1, and 0.2 show rather broad orientation preferences in the form of c-axes tilted from the surface by roughly 10–50°, the glasses with x = 1.5 or higher show discrete textures where specific crystal orientations are significantly preferred with orientation spreads of less than ±15°. While the glasses with x = 0 and 0.1 show polygon crystals at the surface and in the bulk, dendritic crystals are observed in the bulk of all other analyzed compositions. Phase separation solely occurred in the glass with x = 1.5 during the applied heat treatments.

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Section: ■ Introductionmentioning

confidence: 99%

Oriented Nucleation and Crystal Growth of Ba-Fresnoite (Ba₂TiSi₂O₈) in 2 BaO·TiO₂·2 SiO₂ Glasses with Additional SiO₂

Wisniewski

Döhler

Rüssel

2018

Crystal Growth & Design

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“…Additionally, nucleating agents may be added to increase bulk crystallization. Phase-separation could also be used deliberately to nucleate crystallization such as has been proposed for oxide systems precipitating cordierite [15], spinel [16,65], fresnoite [66], and fluorides [67]. This method is likely to result in a reasonably low to moderate total crystal fraction, perhaps at b 50 vol.%.…”

Section: Discussionmentioning

confidence: 99%

Infrared-transparent glass ceramics: An exploratory study

McCloy

Riley

Pierce

2015

Journal of Non-Crystalline Solids

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a b s t r a c tIn this work, the vision and need for a fully ceramized long-wave infrared (LWIR)-transmitting glass ceramic have been articulated. Three sulfide systems were explored including two with La 2 S 3 in hopes of imparting strong bonds from this refractory sulfide, and two containing GeS 2 in hopes of widening the glass-forming region. Attempts were made to produce glasses in the Ga 2 S 3 -La 2 S 3 -(ZnS,CaS) system, the GeS 2 -La 2 S 3 system, and the GeS 2 -Ga 2 S 3 -CdS system. Water quenching produced glasses of Ga 2 S 3 -La 2 S 3 -CaS and GeS 2 -Ga 2 S 3 -CdS. Microstructural and thermal analyses were used to explore nucleation and growth in these systems and infrared transmission and mechanical hardness showed potential for LWIR window use. The GeS 2 -Ga 2 S 3 -CdS system showed good LWIR transmission and pre-crystallized hardness superior to chemical vapor deposited ZnS. The Ga 2 S 3 -La 2 S 3 glasses did not appear to be viable candidates at this time due to a small temperature window between crystallization and glass transition temperatures and problems with oxygen contamination in the La 2 S 3 source. Suggestions are made for two alternative methods for producing fully ceramized LWIR-transmitting glass ceramics.

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“…The powders were prepared in a mole ratio of 70 BaCO 3 : 30 TiO 2 and thoroughly mixed in acetone inside an ultrasonic bath. This composition was chosen because of its effectiveness to form a BTS glass-ceramic structure, as reported in the literature [13,[31][32][33][34]. The mixed power was inserted into the preform and the preform was then heated up to~1900 • C in a tube furnace under a nitrogen environment, while the inside of the tube was kept in a low vacuum (~0.1 bar).…”

Section: Introductionmentioning

confidence: 99%

“…The drawn fiber was then isothermally heat treated at 850 • C for 10 h with a heating rate of 10 • C/min to form a glass-ceramic core. This specific thermal heat treatment was chosen based on the composition analysis of the fiber (which will be discussed in the Section 3) and its corresponding crystallization temperature, reported in the literature [13,[31][32][33][34]. has an eutectic point of ~1260 °C and a melting point of ~1445 °C [13].…”

Section: Introductionmentioning

confidence: 99%

Powder-in-Tube Reactive Molten-Core Fabrication of Glass-Clad BaO-TiO2-SiO2 Glass–Ceramic Fibers

et al. 2020

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In this paper we report the fabrication of glass-clad BaO-TiO2-SiO2 (BTS) glass–ceramic fibers by powder-in-tube reactive molten-core drawing and successive isothermal heat treatment. Upon drawing, the inserted raw powder materials in the fused silica tubing melt and react with the fused silica tubing (housing tubing) via dissolution and diffusion interactions. During the drawing process, the fused silica tubing not only serves as a reactive crucible, but also as a fiber cladding layer. The formation of the BTS glass–ceramic structure in the core was verified by micro-Raman spectroscopy after the successive isothermal heat treatment. Second-harmonic generation and blue-white photoluminescence were observed in the fiber using 1064 nm and 266 nm picosecond laser irradiation, respectively. Therefore, the BTS glass–ceramic fiber is a promising candidate for all fiber based second-order nonlinear and photoluminescence applications. Moreover, the powder-in-tube reactive molten core method offers a more efficient and intrinsic contamination-free approach to fabricate glass–ceramic fibers.

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Influence of amorphous phase separation on the crystallization behavior of glass-ceramics in the BaO–TiO2–SiO2 system

Cited by 13 publications

References 24 publications

Oriented Nucleation and Crystal Growth of Ba-Fresnoite (Ba₂TiSi₂O₈) in 2 BaO·TiO₂·2 SiO₂ Glasses with Additional SiO₂

Oriented Nucleation and Crystal Growth of Ba-Fresnoite (Ba₂TiSi₂O₈) in 2 BaO·TiO₂·2 SiO₂ Glasses with Additional SiO₂

Infrared-transparent glass ceramics: An exploratory study

Powder-in-Tube Reactive Molten-Core Fabrication of Glass-Clad BaO-TiO2-SiO2 Glass–Ceramic Fibers

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Influence of amorphous phase separation on the crystallization behavior of glass-ceramics in the BaO–TiO2–SiO2 system

Cited by 13 publications

References 24 publications

Oriented Nucleation and Crystal Growth of Ba-Fresnoite (Ba2TiSi2O8) in 2 BaO·TiO2·2 SiO2 Glasses with Additional SiO2

Oriented Nucleation and Crystal Growth of Ba-Fresnoite (Ba2TiSi2O8) in 2 BaO·TiO2·2 SiO2 Glasses with Additional SiO2

Infrared-transparent glass ceramics: An exploratory study

Powder-in-Tube Reactive Molten-Core Fabrication of Glass-Clad BaO-TiO2-SiO2 Glass–Ceramic Fibers

Contact Info

Product

Resources

About

Oriented Nucleation and Crystal Growth of Ba-Fresnoite (Ba₂TiSi₂O₈) in 2 BaO·TiO₂·2 SiO₂ Glasses with Additional SiO₂

Oriented Nucleation and Crystal Growth of Ba-Fresnoite (Ba₂TiSi₂O₈) in 2 BaO·TiO₂·2 SiO₂ Glasses with Additional SiO₂