Phase formation and dielectric properties of ferroelectric glass-ceramics in Na2O-BaO-Nb2O5-SiO2 system doped with Nd3+

Kalawa, O.; Tipakontitikul, Rungnapa; Niyompan, Anuson

doi:10.1007/s10832-012-9733-4

Cited by 7 publications

(6 citation statements)

References 19 publications

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“…The present results suggest that Nd 2 O 3 suppresses the development of the Ba 2 NaNb 5 O 15 phase. This is consistent with the result previously reported on the same system [1].…”

Section: Phase Formationsupporting

confidence: 94%

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Crystallization and optical properties of Nd3+ doped ferroelectric glass-ceramics in the barium sodium niobosilicate system

Boonsong

Tipakontitikul

Monmaturapoj

et al. 2015

Ceramics International

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“…The present results suggest that Nd 2 O 3 suppresses the development of the Ba 2 NaNb 5 O 15 phase. This is consistent with the result previously reported on the same system [1].…”

Section: Phase Formationsupporting

confidence: 94%

“…This was in particular of the Na 2 O-BaO-Nb 2 O 5 -SiO 2 system that gave two successive ferroelectric phases, NaNbO 3 and Ba 2 NaNb 5 O 15 after devitrification [1][2][3][4]. Sodium niobate (NaNbO 3 ) is one of the perovskite families that normally show orthorhombic structure with antiferroelectric state at room temperature [5,6].…”

Section: Introductionmentioning

confidence: 99%

Crystallization and optical properties of Nd3+ doped ferroelectric glass-ceramics in the barium sodium niobosilicate system

Boonsong

Tipakontitikul

Monmaturapoj

et al. 2015

Ceramics International

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“…This DSC only shows one exothermic peak in the given temperature range, which means this glass exhibits different crystallization properties, when compared to the system studied by Kalawa et al In that work a Na 2 O-BaO-Nb 2 O 5 -SiO 2 system was studied, and it was found to have three separate exothermic peaks. 8 This single sharp exothermic peak suggests a single crystallization step, or more specifically there is no evidence of a difference in crystallization temperatures between the NN and BNN phases. Thermogravimetric analysis was also performed, but no significant weight loss was found up to 1000°C.…”

Section: Crystalline Phase Formationmentioning

confidence: 97%

“…Glass-ceramic materials are excellent candidates for such dielectric materials because of their potential for high energy density. [2][3][4][5][6][7][8][9][10] The melt casting used to obtain these materials is advantageous because cast amorphous bodies are normally pore free, and defects, such as pores, are detrimental to the breakdown strength of dielectric materials made through conventional solid-state processing. 11 The controlled crystallization of glass-ceramics also allows for tailoring of dielectric properties to help improve energy density.…”

Section: Introductionmentioning

confidence: 99%

Effect of Microwave Processing on the Crystallization and Energy Density of BaO‐Na₂O‐Nb₂O₅‐SiO₂‐B₂O₃ Glass‐Ceramics

2016

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Barium sodium niobate (BNN) glass-ceramics were successfully synthesized through a controlled crystallization method, using both a conventional and a microwave hybrid heating process. The dielectric properties of glass-ceramics devitrified at different temperatures and conditions were measured. It was found that the dielectric constant increased with higher crystallization temperature, from 750°C to 1000°C, and that growth of the crystalline phase above 900°C was essential to enhancing the relative permittivity and overall energy storage properties of the material. The highest energy storage was found for materials crystallized conventionally at 1000°C with a discharge energy density of 0.13 J/cm 3 at a maximum field of 100 kV/cm. Rapid microwave heating was found to not give significant enhancement in dielectric properties, and coarsening of the ferroelectric crystals was found to be critical for higher energy storage. K E Y W O R D Sdielectric materials/properties, glass-ceramics, Weibull statistics | INTRODUCTIONImprovement in capacitor technology is essential to meet the continued demand for more compact and reliable electrical power systems. In these systems, which require high-energy pulsed power, capacitors occupy a large volume; therefore capacitors with improved energy density are required for higher efficiency and compactness. 1 Traditional dielectric ceramics have low energy densities because of their defects and porosity. In order to achieve the goal of higher energy density, dielectric material with superior properties must be developed. These materials must be able to withstand high voltages, i.e., have high breakdown strength (E b ), have a high relative permittivity (e r ), and have high-energy efficiency through a charge/discharge cycle. Glass-ceramic materials are excellent candidates for such dielectric materials because of their potential for high energy density. [2][3][4][5][6][7][8][9][10] The melt casting used to obtain these materials is advantageous because cast amorphous bodies are normally pore free, and defects, such as pores, are detrimental to the breakdown strength of dielectric materials made through conventional solid-state processing. 11 The controlled crystallization of glass-ceramics also allows for tailoring of dielectric properties to help improve energy density. 10,12 Particularly, glass-ceramics that contain a crystalline ferroelectric phase have been studied due to their large dielectric constant, and based on the phase the materials exhibited an energy density ranging from 0.9 to 4.0 J/cm 3 , depending on the measuring method, and these energy densities can be orders of magnitude higher than porous conventional ceramic dielectrics made with the same phase. 4,5,10,13,14 A material with high values for both breakdown strength and permittivity would be desirable, unfortunately there is an inverse relationship between the E b and e r . 15 In glass ceramic systems the crystallization allows for the tailoring of these two variables, in order to achieve an optimized ene...

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“…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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Phase formation and dielectric properties of ferroelectric glass-ceramics in Na2O-BaO-Nb2O5-SiO2 system doped with Nd3+

Cited by 7 publications

References 19 publications

Crystallization and optical properties of Nd3+ doped ferroelectric glass-ceramics in the barium sodium niobosilicate system

Crystallization and optical properties of Nd3+ doped ferroelectric glass-ceramics in the barium sodium niobosilicate system

Effect of Microwave Processing on the Crystallization and Energy Density of BaO‐Na₂O‐Nb₂O₅‐SiO₂‐B₂O₃ Glass‐Ceramics

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

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Phase formation and dielectric properties of ferroelectric glass-ceramics in Na2O-BaO-Nb2O5-SiO2 system doped with Nd3+

Cited by 7 publications

References 19 publications

Crystallization and optical properties of Nd3+ doped ferroelectric glass-ceramics in the barium sodium niobosilicate system

Crystallization and optical properties of Nd3+ doped ferroelectric glass-ceramics in the barium sodium niobosilicate system

Effect of Microwave Processing on the Crystallization and Energy Density of BaO‐Na2O‐Nb2O5‐SiO2‐B2O3 Glass‐Ceramics

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

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Effect of Microwave Processing on the Crystallization and Energy Density of BaO‐Na₂O‐Nb₂O₅‐SiO₂‐B₂O₃ Glass‐Ceramics