Structure and Electric Properties of Sm Doped BaTiO<sub>3</sub>Ceramics

Sun, Haiqin; Wang, Xusheng; Yao, Xi

doi:10.1080/00150193.2010.482459

Cited by 23 publications

(8 citation statements)

References 16 publications

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“…, all of the samples have the similar emission and excitation peak patterns, and the peak intensity of 1 D 2 → 3 H 4 transition (602 nm) tends to increase with Pr 3+ concentration, and reaches to their maximum at a definite concentration, subsequently decreases with further increasing Pr contents due to the concentration‐quenching effect. However, the concentration‐quenching effect is varied by different sintering temperature, namely, the intensity of emission reaches the maximum at a lower concentration of Pr 3+ as the sintering temperature increases, which is well understood that the substitution of Pr 3+ into A site in ABO 3 lattice generates an extra positive charge, then the samples at higher temperature (1400°C) and doping content tend to semiconductor, at the same time, we also found that the obtained Pr‐doped samples exhibit black color related to the presence of Ti 3+ as like reported in literatures, the detailed mechanism may be coming from the following: (a) a direct donor‐doping process:.

{Pr}_{Ba, Ca} \Leftrightarrow {Pr}_{Ba, Ca}^{∙} + e^{'}

{Ti}^{4 +} + e^{'} \Leftrightarrow {Ti}^{3 +}

; (b) the loss of oxygen during high‐temperature sintering:

{normalO}^{\times} \Leftrightarrow {\overset{V}{true}}_{normalO} + 2 e^{'} + 1 / 2 {normalO}_{2}

.…”

Section: Resultssupporting

confidence: 85%

Polarization‐Induced Photoluminescence Quenching in (Ba_0.7Ca_0.3TiO₃)–(BaZr_0.2Ti_0.8O₃):Pr Ceramics

2013

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Pr 3+ -doped (Ba 0.85 Ca 0.15 )(Zr 0.1 Ti 0.9 )TiO 3 ceramics were prepared by a solid-state reaction method. The effects of doping concentration, sintering temperature, and ferroelectric remanent polarization on photoluminescence (PL) properties of samples were systematically investigated. The PL spectra of samples exhibit strong green and red emissions with a broad blue excitation band ranging from 430 to 500 nm, in a good agreement with all commercial blue LEDs emission wavelength. Except for the concentration and temperature PL quenching, the polarization-induced PL quenching was obviously observed, and the degree of PL quenching changes with Pr 3+ concentrations, the origin of the change is well interpreted by field-induced structural phase transitions between rhombohedral (R3m) and tetragonal (P4mm) for BCZT: xPr ceramics near the morphotropic phase boundary.

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{Pr}_{Ba, Ca} \Leftrightarrow {Pr}_{Ba, Ca}^{∙} + e^{'}

{Ti}^{4 +} + e^{'} \Leftrightarrow {Ti}^{3 +}

; (b) the loss of oxygen during high‐temperature sintering:

{normalO}^{\times} \Leftrightarrow {\overset{V}{true}}_{normalO} + 2 e^{'} + 1 / 2 {normalO}_{2}

.…”

Section: Resultssupporting

confidence: 85%

Polarization‐Induced Photoluminescence Quenching in (Ba_0.7Ca_0.3TiO₃)–(BaZr_0.2Ti_0.8O₃):Pr Ceramics

2013

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“…The replacement of Ba 2+ (1.61 Å) [24] ions by smaller Sm 3+ (1.24 Å) [24] ions caused the contraction of V 0 . It was consistent with the previous report that Sm ions preferentially occupy Ba sites at Ba/Ti < 1 [25]. Tsur et al [26] have also reported that Sm incorporates mainly into Ba sites.…”

Section: Resultssupporting

confidence: 92%

Dense Sm and Mn Co-Doped BaTiO3 Ceramics with High Permittivity

Liu

et al. 2019

Materials

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The structure, valence state, and dielectric properties of (Ba1−xSmx)(Ti0.99Mn0.01)O3 (BSTM) (x = 0.02‒0.07) ceramics prepared via a high temperature (1400 °C/12 h) solid state reaction were investigated. A homogeneous and dense microstructure was observed in all samples. With increasing Sm content, the crystal structure changed from tetragonal (x ≤ 0.06) to cubic (x = 0.07) and unit cell volume (V0) decreased continuously, which was mainly due to the substitution of Ba2+ ions by smaller Sm3+ ions in the perovskite lattice. Electron paramagnetic resonance investigation revealed that Mn ions were reduced from high valence to low valence under the role of Sm3+ donor, and only Mn2+ ions were observed at x = 0.07. The Curie temperature (Tc) moved to lower values, from 105.5 down to 20.4 °C, and the x = 0.07 sample satisfied Y5V specification with high permittivity (ε′RT > 13,000) and low loss (tan δ < 0.03).

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“…It is effective in significantly increasing the dielectric constant of BT ceramics with rare-earth doping (Caballero et al, 2000;Morrison et al, 2001). Sun et al (2010) reported the enhancement of dielectric properties in the Sm doped BT ceramics. Sm doping can inhibit the growth of the crystal grains and make the BT ceramics possess semiconductor characteristics.…”

Section: Rare-earth Doped Bt Ceramicmentioning

confidence: 99%

Review of Research on the Rare-Earth Doped Piezoelectric Materials

et al. 2021

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The piezoelectric materials, such as ceramics, crystals, and films, have wide applications in the mechanical industry, medical imaging, electronic information, and ultrasonic devices, etc. Generally, adding oxide dopants, or introducing new solid solutions to form the morphotropic phase boundary of the piezoelectric materials were common strategies to enhance the electric properties. In recent decades, rare-earth elements doped piezoelectric materials have attracted much attention due to their multifunctional performances combining piezoelectric and photoluminescence properties, which has potential applications in ultrasonics, electronics, automatic control, machinery and optoelectronic fields. An overview of the recent investigations and perspectives on rare-earth doped piezoelectric ceramics, single crystals, and films were presented.

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Structure and Electric Properties of Sm Doped BaTiO₃Ceramics

Cited by 23 publications

References 16 publications

Polarization‐Induced Photoluminescence Quenching in (Ba_0.7Ca_0.3TiO₃)–(BaZr_0.2Ti_0.8O₃):Pr Ceramics

Polarization‐Induced Photoluminescence Quenching in (Ba_0.7Ca_0.3TiO₃)–(BaZr_0.2Ti_0.8O₃):Pr Ceramics

Dense Sm and Mn Co-Doped BaTiO3 Ceramics with High Permittivity

Review of Research on the Rare-Earth Doped Piezoelectric Materials

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Structure and Electric Properties of Sm Doped BaTiO3Ceramics

Cited by 23 publications

References 16 publications

Polarization‐Induced Photoluminescence Quenching in (Ba0.7Ca0.3TiO3)–(BaZr0.2Ti0.8O3):Pr Ceramics

Polarization‐Induced Photoluminescence Quenching in (Ba0.7Ca0.3TiO3)–(BaZr0.2Ti0.8O3):Pr Ceramics

Dense Sm and Mn Co-Doped BaTiO3 Ceramics with High Permittivity

Review of Research on the Rare-Earth Doped Piezoelectric Materials

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Product

Resources

About

Structure and Electric Properties of Sm Doped BaTiO₃Ceramics

Polarization‐Induced Photoluminescence Quenching in (Ba_0.7Ca_0.3TiO₃)–(BaZr_0.2Ti_0.8O₃):Pr Ceramics

Polarization‐Induced Photoluminescence Quenching in (Ba_0.7Ca_0.3TiO₃)–(BaZr_0.2Ti_0.8O₃):Pr Ceramics