Dielectric characteristics of B-site-modified hexagonal-barium titanate

Li, Fuyun; Yu, Hongtao; Xu, Hui; Li, Jing

doi:10.1007/s10854-015-4098-5

Cited by 8 publications

(4 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Barium titanate (BaTiO 3 ) is probably the most widely studied and used multifunctional ferroelectric ceramic. A great deal of experimental and theoretical researches on both aliovalent and isovalent doping in BaTiO 3 has produced great insights, which are constantly growing. ,,,,,− …”

Section: Ferroelectricsmentioning

confidence: 99%

Defects and Aliovalent Doping Engineering in Electroceramics

et al. 2020

View full text Add to dashboard Cite

Since the positive influences of defects on the performance of electroceramics were discovered, investigations concerning on defects and aliovalent doping routes have grown rapidly in the fields of inorganic chemistry and condensed matter physics. In this article, we summarized the types of defects in electroceramics as well as characterization tools of defects and highlighted the effects of intrinsic and extrinsic defects on the material performances with the emphasis on dielectric, ferroelectric, and piezoelectric properties. We mainly introduced defect related theoretical simulation and experimental results in several typical incipient ferroelectrics, ferroelectrics, and antiferroelectrics. Hence, the influences of defects on the crystal lattice were summed up, and then the main physical mechanisms were highlighted. Particularly, the performance enhancements of aliovalently doped electroceramics were also evaluated and reviewed. Finally, the outlook and challenges were discussed on the basis of their current developments. This article covers not only an overview of the state-of-the-art advances of defects and aliovalent doping routes in electroceramics but also the future prospects that may open another window to tune the electrical performance of electroceramics via intentionally introducing certain defects.

show abstract

Section: Ferroelectricsmentioning

confidence: 99%

Defects and Aliovalent Doping Engineering in Electroceramics

et al. 2020

View full text Add to dashboard Cite

show abstract

“…In contrast, hexagonal BaTiO 3 (h‐BaTiO 3 ) is a high‐temperature phase that is usually metastable at room temperature. Li et al suggested that the hexagonal phase can be stabilized at room temperature via the substitution of Cr and Sb for Ti 12 . Regarding the dielectric properties, Akishige et al reported that single‐crystal h‐BaTiO 3 grown from the molten phase had a low dielectric constant ( ε ′ < 2200 at 1 kHz) 13 .…”

Section: Introductionmentioning

confidence: 99%

Direct selective laser sintering of hexagonal barium titanate ceramics

Zhang

Wang

et al. 2020

J. Am. Ceram. Soc.

View full text Add to dashboard Cite

Barium titanate (BaTiO 3) are functional ceramics with attractive ferroelectric and piezoelectric properties, 1-3 which enable their broad applications such as acoustic imaging, chip capacitors, and dynamic access memories. 4,5 The phase transformation of BaTiO 3 occurs with the temperatures: rhombohedral to orthorhombic at ~−90°C, orthorhombic to tetragonal at ~0°C, tetragonal to cubic at ~120°C, and cubic to hexagonal at ~1460 o C. 6-8 Among these five polymorphs, tetragonal (t-BaTiO 3) phase is used to prepare piezoelectric ceramics with high piezoelectric coefficients and dielectric constants (d 33 ~ 1500 to 500 pC/N, and ε′ ~ 3000 to 6800 at a frequency range from 0.1 to 10 kHz, 25ºC). 9-11 In contrast, hexagonal BaTiO 3 (h-BaTiO 3) is a high-temperature phase that is usually metastable at room temperature. Li et al suggested that the hexagonal phase can be stabilized at room temperature via the substitution of Cr and Sb for Ti. 12 Regarding the dielectric properties, Akishige et al reported that single-crystal h-BaTiO 3 grown from the molten phase had a low dielectric constant (ε′ < 2200 at 1 kHz). 13 Later, Yu et al synthesized h-BaTiO 3 crystals using a pressurized

show abstract

“…BaTiO 3 /CoFe 2 O 4 composites possess better magnetoelectric properties as a result of individual phases contribution. Perovskite BaTiO 3 (BTO) is an excellent e cient ceramic having interesting ferroelectric properties, and its optical properties, such as multilayer ceramic capacitors (MLCC), converters, actuators, random access ferroelectric memory devices with energy storage applications [16]. BaTiO 3 mainly exhibit ferroelectric property but it can be multiferroic if it synthesized at nanoscale.…”

Section: Introductionmentioning

confidence: 99%

Structural, Magnetic, Dielectric and Energy Storage Analysis of CoFe2O4@BaTiO3 and BaTiO3@CoFe2O4 Core-Shell Nano- Composites

Sheoran¹,

Kumar²,

Kumar³

2020

Preprint

View full text Add to dashboard Cite

Nano size spinel ferrite CoFe2O4 (CFO), ferroelectric BaTiO3 (BTO) and their core-shell nanocomposites BTO@CFO and CFO@BTO were synthesized using combination of chemical co-precipitation and sol-gel route respectively. The phase formation and crystallinity of bare CFO, BTO and their core-shell nanocomposites were verifiedviaX-ray diﬀraction pattern (XRD). High resolution transmission electron microscopy(HRTEM) revealed the core-shell structure of the nanocomposites.Magnetization measurements exhibitferromagnetic behaviour of all the samples except BTO in which superposition of weak ferromagnetic and diamagnetic response occurred due to its nanostructure. Magnetization versus temperature (M-T plot) measurements show anomaly near ferroelectric to paraelectric phase transition of BTO. Also,dielectric constant(ε¢) and tangent loss (tanδ) variation with respect to frequency (102 to 106 Hz) and temperature (300-700 K) were presented. ε¢-T curve of nanocomposites exhibit anomaly at the same temperature as observed in M-T plot of nanocomposites that indicate the inherent magneto-electric coupling in nanocomposites. Energy storage properties of BTO and nanocomposites have been examined via P-E loop analysis and confirmed that the sample CFO@BTO exhibit maximum energy storage efficiency.

show abstract

Dielectric characteristics of B-site-modified hexagonal-barium titanate

Cited by 8 publications

References 18 publications

Defects and Aliovalent Doping Engineering in Electroceramics

Defects and Aliovalent Doping Engineering in Electroceramics

Direct selective laser sintering of hexagonal barium titanate ceramics

Structural, Magnetic, Dielectric and Energy Storage Analysis of CoFe2O4@BaTiO3 and BaTiO3@CoFe2O4 Core-Shell Nano- Composites

Contact Info

Product

Resources

About