Effect of Al2O3 addition on the formation of perovskite-type NaNbO3 nanocrystals in silicate-based glasses

Kioka, K.; Honma, Tsuyoshi; Oh-ishi, Keiichiro; Reibstein, Sindy; Ning, De; Wondraczek, Lothar; Komatsu, Takayuki

doi:10.1016/j.jnoncrysol.2012.04.011

Cited by 9 publications

(5 citation statements)

References 59 publications

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“…Another type of kinetically controlled crystallization that uses a thermal gradient is laser‐induced crystallization which offers excellent control over localized crystallization in glasses 89,90 . Laser irradiation has been demonstrated in glass‐ceramic systems to orient crystals including LiNbO 3 , 91 NaNbO 3 , 92,93 Sr 2 TiSi 2 O 8 , 94 β‐BaB 2 O 4 , 95 Ba 2 TiSi 2 O 8 , 93,96,97 Ba 2 TiGe 2 O 8 , 93,97‐100 and Li 2 Si 2 O 5 101 . Doping glass compositions with rare earth metals and transition metals to improve light absorbance from the laser and increase local heating has also been demonstrated 89,102,103 .…”

Section: Preparation Of Glass‐ceramicsmentioning

confidence: 99%

Piezoelectric glass‐ceramics: Crystal chemistry, orientation mechanisms, and emerging applications

2021

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Piezoelectric materials have coupled mechanical and electrical energies and have long been used in devices for actuators, sensors, energy harvesters, frequency filters, and various additional applications. Piezoelectricity requires a non‐centrosymmetric crystal structure and is therefore confined to materials that possess a periodic crystalline structure. Due to the non‐crystalline nature of glass, piezoelectricity is fundamentally forbidden. However, one way to exploit piezoelectric properties in a glassy matrix is by developing glass‐ceramics that possess controlled growth of a crystalline phase. Growth and orientation of piezoelectric crystals in a glassy matrix is a non‐trivial process that has long been explored to combine the formability of glass with the thermal and mechanical resilience of glass‐ceramics. While extensive work has been done in the field of functional glass‐ceramics, the results are presented in isolated articles and a comprehensive review pertaining to symmetry breaking methods to exploit anisotropic properties in glass‐ceramics has been absent from the literature. Here, we present a global review of the fundamental symmetry requirements for piezoelectricity, the development of polar, piezoelectric glass‐ceramic compositions (specifically those with LiNbO3 and fresnoite‐based crystal phases), and various crystal growth and orientation mechanisms, including relevant kinetic and thermodynamic driving forces. Lastly, we discuss the challenges associated with implementing gradients to drive oriented crystal growth to develop non‐centrosymmetry, and the need for future modeling work to produce adequate time‐temperature‐transformation (TTT) diagrams that take into account kinetic and thermodynamic driving forces for oriented crystal growth. Going beyond technical challenges, we conclude with an examination of current and potential applications for piezoelectric glass‐ceramics that combine the formability of glass with the symmetry‐dependent properties of ceramics.

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Section: Preparation Of Glass‐ceramicsmentioning

confidence: 99%

Piezoelectric glass‐ceramics: Crystal chemistry, orientation mechanisms, and emerging applications

2021

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“…It should be pointed out that the combination of SiO 2 and Al 2 O 3 is very effective for the glass formation and precipitation of nanocrystals, for example, ZnO nanocrystals in K 2 O‐ZnO‐SiO 2 ‐Al 2 O 3 , CaF 2 nanocrystals in aluminosilicate‐based oxyfluoride glasses, and NaNbO 3 nanocrystals in Na 2 O‐Nb 2 O 5 ‐SiO 2 ‐Al 2 O 3 . In the case of the formation of CaF 2 nanocrystals in aluminosilicate‐based oxyfluoride glasses, for instance, it has been reported that the network structure constructed by Al 2 O 3 and SiO 2 is rigid and stable thermally and consequently depress the large growth of CaF 2 cystals …”

Section: Design Of Glass System and Compositionmentioning

confidence: 99%

Optical Active Nano‐Glass‐Ceramics

Komatsu

Honma

2013

Int J of Appl Glass Sci

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This paper reviews the synthesis and characterization of several transparent glass-ceramics with optical active nanocrystals. Glass-ceramics containing ferroelectric Sr x Ba 1-x Nb 2 O 6 nanocrystals with an ellipsoidal shape show optical phase modulations in the presence of alternative electric fields. In the glass-ceramics with Ba 2 TiSi 2 O 8 (BTS) nanocrystals, BTS crystalline layers with a thickness of approximately 120 nm are formed at the surface and ellipsoidal-shaped crystallites with a diameter of 100-200 nm are dispersed in the glass matrix. Some TeO 2 -based and GeO 2 -based glasses show a prominent nanocrystallization. RE-doped CaF 2 nanocrystals are patterned in a spatially selected region by laser irradiations. The size, morphology, and dispersion state of nanocrystals should be carefully checked in each glass system and composition. The basic concept for the design of glass system and composition is also discussed. Some data on optical active performances in transparent glass-ceramics with nanocrystals were introduced.

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“…system where F.O. is denoted as former oxide (SiO 2 , Al 2 O 3 or B 2 O 3 ) [5,13,14]. However, a rapid crystallization rate and the phase separation nature of the parent glasses has lead to difficulties of controlling crystallization which occasionally has led to glass-ceramics with large crystallite sizes and diminished optical transparency properties [6].…”

Section: /[902]mentioning

confidence: 99%

“…However, a rapid crystallization rate and the phase separation nature of the parent glasses has lead to difficulties of controlling crystallization which occasionally has led to glass-ceramics with large crystallite sizes and diminished optical transparency properties [6]. To address these problems, the introduction of another alkali [15] or the use of intermediate oxides such as PbO [16] and Al 2 O 3 [14] have been performed. These preparations have been shown to be a successful solution for obtaining transparent glass-ceramic with electrical property improvements [17].…”

Section: /[902]mentioning

confidence: 99%

Crystallization and Dielectric Properties of Ferroelectric Glass-Ceramics Containing Sodium Niobate Crystals

Tipakontitikul

Niyompan

2013

Ferroelectrics

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Ferroelectric glass-ceramics of the sodium-niobate-aluminum-silicate (NaO-Nb 2 O 5 -SiO 2 +Al 2 O 3 ) system, with various amounts of ZrO 2 added, were synthesized through melt casting followed by controlled crystallization. The crystallization behavior, microstructure, and dielectric performances of the glass-ceramics were investigated. The addition of 1 mol% ZrO 2 to the glass-ceramics improved the glass forming ability of the phase separated melts and supported the formation of transparent glass-ceramics after precipitation of the NaNbO 3 ferroelectric crystals. The presence of ZrO 2 also promoted a well-defined microstructure which presented as an improvement in the dielectric constant of the glass-ceramic heat treated at 750 • C for 1 h. Dipole polarization was responsible for the dielectric response of the glass-ceramics, but due to structural heterogeneities coupled with high migration of the mobile species, a complicated dielectric relaxation mechanism was also found.

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Effect of Al2O3 addition on the formation of perovskite-type NaNbO3 nanocrystals in silicate-based glasses

Cited by 9 publications

References 59 publications

Piezoelectric glass‐ceramics: Crystal chemistry, orientation mechanisms, and emerging applications

Piezoelectric glass‐ceramics: Crystal chemistry, orientation mechanisms, and emerging applications

Optical Active Nano‐Glass‐Ceramics

Crystallization and Dielectric Properties of Ferroelectric Glass-Ceramics Containing Sodium Niobate Crystals

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