Fundamental optical spectra of ferroelectric NaNO2

Kalugina, S. G.; Kalugin, A. I.; Соболев, В. В.

doi:10.1134/s0020168509080196

Cited by 1 publication

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“…Consequently, CSP can achieve high relative densities exceeding 90% after 24 h at room temperature and 75% relative humidity. Furthermore, CSP has been effectively employed with various metal oxide and dielectric materials, including KH2PO4, NaNO2, and BaTiO3; BT [5,6]. Notably, KH2PO4 and NaNO2 exhibit high relative densities (>98%) comparable to conventionally sintered materials, even when treated at temperatures below 120 ˚C under 350 MPa without additional treatment.…”

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confidence: 99%

The role of γ-C ₂H ₅NO ₂ as a new transient liquid phase in cold sintering process of BaTiO ₃ composites

Noisak,

Ieamviteevanich,

Charoonsuk

et al. 2024

Journal of Advanced Ceramics

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Dielectric materials, like barium titanate-based (BT-based), have excellent dielectric properties but require high temperatures (above 1300 ˚C) for ceramic fabrication, leading to high costs and energy loss. The cold sintering process (CSP) offers a solution to these issues and is gaining worldwide attention as an innovative fabrication route. In this work, we proposed an alternative organic ferroelectric phase, gamma-glycine (γ-GC) that acts as a transient liquid phase to fabricate high-density composites with barium titanate (BT) at low-temperature through a CSP.Our findings show that the density of 15γ-GC/85BT reached 96.7±1.6% when sintered at 120 ˚C for 6 hours (h) under 10MPa uniaxial pressure. The SEM-EDS mapping of the composite suggested that γ-GC completely underwent the precipitation-dissolution process and, therefore, filled between BT particles. Moreover, XRD and FTIR confirmed the preservation of γ-GC without the undesired phase transformation. In addition, the ferroelectric and dielectric properties of the γ-GC/BT composites were reported. The high dielectric constant (εr) was 3600, and the low dielectric loss (tan δ) was 1.20 at 200 ˚C, 100 kHz, with 15γ-GC/85BT composite. The hysteresis loop showed a remanent polarization (Pr) of 0.55 µC.cm -2 and a coercive field (Ec) of 7.25 kV.cm -1 . Our findings reaffirmed that organic ferroelectric material (γ-GC) can act as a transient liquid phase in a CSP that can successfully and sustainably fabricate γ-GC/BT composites at low temperatures while delivering outstandingly high performance.

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Section: Introductionmentioning

confidence: 99%

The role of γ-C ₂H ₅NO ₂ as a new transient liquid phase in cold sintering process of BaTiO ₃ composites

Noisak,

Ieamviteevanich,

Charoonsuk

et al. 2024

Journal of Advanced Ceramics

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Fundamental optical spectra of ferroelectric NaNO2

Cited by 1 publication

References 5 publications

The role of γ-C ₂H ₅NO ₂ as a new transient liquid phase in cold sintering process of BaTiO ₃ composites

The role of γ-C ₂H ₅NO ₂ as a new transient liquid phase in cold sintering process of BaTiO ₃ composites

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Fundamental optical spectra of ferroelectric NaNO2

Cited by 1 publication

References 5 publications

The role of γ-C 2H 5NO 2 as a new transient liquid phase in cold sintering process of BaTiO 3 composites

The role of γ-C 2H 5NO 2 as a new transient liquid phase in cold sintering process of BaTiO 3 composites

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The role of γ-C ₂H ₅NO ₂ as a new transient liquid phase in cold sintering process of BaTiO ₃ composites

The role of γ-C ₂H ₅NO ₂ as a new transient liquid phase in cold sintering process of BaTiO ₃ composites