Enhanced ferro-/piezoelectric properties of tape-casting-derived Er3+-doped Ba0.85Ca0.15Ti0.9Zr0.1O3 optoelectronic thick films

Xu, Jie; Lu, Qiling; Lin, Jinfeng; Lin, Cong; Zheng, X. H.; Lin, Tengfei; Wu, Xiao

doi:10.1007/s40145-020-0405-6

Cited by 23 publications

(14 citation statements)

References 41 publications

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“…BaM-based cationic substitutions for Fe 3+ are used to modify the dielectric and magnetic parameters, which play an important role in RL calculation. The substitutions for Fe 3+ of BaM-based can be divided into two main approaches: covalent cation substitution, such as Ga 3+ , In 3+ ; and Er 3+ and hetervalent cationic combination, such as Co 2+ -Ti 4+ , Co 2+ -Zr 4+ , and Ni 2+ -Ti 4+ [22][23][24][25][26]. However, recent studies have shown that the introduction of high-valence ions destroys the valence state equilibrium of barium ferrite, resulting in multiple absorption peaks, which can increase the bandwidth of electromagnetic wave absorption of the material [27][28][29].…”

Section: Introduction mentioning

confidence: 99%

A neutron diffraction investigation of high valent doped barium ferrite with wideband tunable microwave absorption

Hong

et al. 2022

J Adv Ceram

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The barium ferrite BaTixFe12−xO19 (x = 0.2, 0.4, 0.6, 0.8) (BFTO-x) ceramics doped by Ti4+ were synthesized by a modified sol—gel method. The crystal structure and magnetic structure of the samples were determined by neutron diffraction, and confirm that the BFTO-x ceramics were high quality single phase with sheet microstructure. With x increasing from 0.2 to 0.8, the saturation magnetization (Ms) decreases gradually but the change trend of coercivity (Hc) is complex under the synergy of the changed grain size and the magnetic crystal anisotropy field. Relying on the high valence of Ti4+, double resonance peaks are obtained in the curves of the imaginary part of magnetic conductivity (μ″) and the resonance peaks could move toward the low frequency with the increase of x, which facilitate the samples perform an excellent wideband modulation microwave absorption property. In the x = 0.2 sample, the maximum reflection loss (RL) can reach −44.9 dB at the thickness of only 1.8 mm, and the bandwidth could reach 5.28 GHz at 2 mm when RL is less than −10 dB. All the BFTO-x ceramics show excellent frequency modulation ability varying from 18 (x = 0.8) to 4 GHz (x = 0.4), which covers 81% of the investigated frequency in microwave absorption field. This work not only implements the tunable of electromagnetic parameters but also broadens the application of high-performance microwave absorption devices.

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Section: Introduction mentioning

confidence: 99%

A neutron diffraction investigation of high valent doped barium ferrite with wideband tunable microwave absorption

Hong

et al. 2022

J Adv Ceram

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“…High ε r dielectrics are preferred for capacitors and there are some promising lead-based ceramics that have a high ε r value in the range of 10,000-25,000, such as Pb(Fe 1/3 W 2/3 )O 3 , Pb(Mg 1/3 Nb 2/3 )O 3 and Pb(Zn 1/3 Nb 2/3 )O 3 but lead is considered toxic and hazardous to human health [16][17][18][19][20][21][22][23]. Therefore, the use of lead is constrained by the European Union.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Thermal Stability in Dielectric Properties of NaNbO3–Modified BaTiO3–BiMg1/2Ti1/2O3 Ceramics for X9R-MLCC Applications

et al. 2022

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0.5BaTiO3–(0.5 − x)BiMg1/2Ti1/2O3−xNaNbO3 (x = 0.10–0.30) ceramics were processed via a conventional solid state sintering route. X-ray diffraction analysis and Raman spectroscopy showed the formation of a cubic perovskite structure. Microstructural analysis of the samples revealed densely packed grains. The addition of NaNbO3 resulted in the enhancement in dielectric properties as a function of temperature. Relative permittivity decreased from 850 to 564 (at room temperature) with an increase in x; however, the stability in dielectric properties was improved with an increase in NaNbO3 concentration. At x = 0.25, relative permittivity (εr) was ~630 ± 15% in a temperature range of −70–220 °C with low dielectric loss (tanδ) < 0.025 (−57 to 350 °C) and high recoverable energy density ~0.55 J/cm3 which meet the criterion for X9R MLCC applications.

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“…The substitutions for Fe 3+ of BaM-based can be divided into two main approaches: covalent cation substitution such as Ga 3+ , In 3+ , and Er 3+ and hetervalent cationic combination such as Co 2+ -Ti 4+ , Co 2+ -Zr 4+ , Ni 2+ -Ti 4+ , and so on [10][11][12][13][14]. However, recent studies have shown that the introduction of high-valence ions destroys the valence state equilibrium of barium ferrite, resulting in multiple absorption peaks, which can increase the bandwidth of electromagnetic wave absorption of the material [15,16].…”

Section: Introductionmentioning

confidence: 99%

A Neutron Diffraction Investigation of High Valent Doped Barium Ferrite With Super-wide Tunable Microwave Absorption

Hong

et al. 2021

Preprint

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The Barium ferrite BaTixFe12-xO19 (x = 0.2, 0.4, 0.6, 0.8) ceramics doped by Ti4+ (BFTO-x) were synthesized by a modified sol-gel method. The crystal structure and magnetic structure of the samples were determined by neutron diffraction, and confirm that the BFTO-x ceramics were high quality single phase with sheet micro-structure. With x increasing from 0.2 to 0.8, the Ms decreases gradually but the change of Hc is complex under the synergy of the changed grain size and the magnetic crystal anisotropy field. Relying on the high valence of Ti4+, double resonance peaks are obtained in the curves of μ′′ and the resonance peaks could move towards the low frequency with the increase of x, which facilitate the samples perform an excellent wide-band modulation microwave absorption property. In the x = 0.2 sample, the maximum reflection loss can reach –44.9 dB at the thickness of only 1.8 mm, and the bandwidth could reach to 5.28 GHz at 2 mm when the RL is less than –10 dB. All the BFTO-x ceramics show excellent frequency modulation ability varying from 18 GHz (x = 0.8) to 4 GHz (x = 0.4), which covers 81% of the investigated frequency in microwave absorption field.

show abstract

Enhanced ferro-/piezoelectric properties of tape-casting-derived Er3+-doped Ba0.85Ca0.15Ti0.9Zr0.1O3 optoelectronic thick films

Cited by 23 publications

References 41 publications

A neutron diffraction investigation of high valent doped barium ferrite with wideband tunable microwave absorption

A neutron diffraction investigation of high valent doped barium ferrite with wideband tunable microwave absorption

Enhanced Thermal Stability in Dielectric Properties of NaNbO3–Modified BaTiO3–BiMg1/2Ti1/2O3 Ceramics for X9R-MLCC Applications

A Neutron Diffraction Investigation of High Valent Doped Barium Ferrite With Super-wide Tunable Microwave Absorption

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