A brief review of the effect of grain size variation on the electrical properties of BaTiO3-based ceramics

Ghayour, Hamid; Abdellahi, Majid

doi:10.1016/j.powtec.2016.01.030

Cited by 93 publications

(31 citation statements)

References 142 publications

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“…In this context, enhanced relaxor behavior is obtained while decreasing grain size in BCZT ceramics [43,44]. Traditionally, it has been argued that the increase in grain size of sintered ceramics enhances their dielectric properties [5,25]. As mentioned earlier, for B-SDS ceramics, the dielectric constant and dielectric loss are enhanced with 80% and 70%, respectively, after increasing the grain size from 3.6 to 6.6 µm.…”

Section: Dielectric Properties Of Sintered Ceramicsmentioning

confidence: 84%

Enhancement of dielectric properties of lead-free BCZT ferroelectric ceramics by grain size engineering

Hanani

Mezzane

Amjoud

et al. 2019

Superlattices and Microstructures

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Lead-free Ba 0.85 Ca 0.15 Ti 0.9 Zr 0.1 O 3 (BCZT) ceramics had attracted much attention for the fabrication of microelectronic devices by virtue of their excellent dielectric, ferroelectric and piezoelectric properties. To understand the effects of both mean grain size and grain size distribution on the dielectric properties of lead-free Ba 0.85 Ca 0.15 Ti 0.9 Zr 0.1 O 3 (BCZT) ferroelectric relaxors, an original method was proposed. It is based on the surfactant-assisted solvothermal processing coupled with lowtemperature conventional sintering at 1250 °C. In this way, three highly dense BCZT with different mean grain size and dissimilar grain size distribution were designed. A significant increase of dielectric properties was obtained by a control of grain size and densification process. The dielectric constants measured were ranged from 5370 to 9646 and the dielectric loss was enhanced by 70%. Surprisingly, it was evidenced that there is unequivocal link between mean grain size with dielectric properties. Indeed, it was found that the presence of high density of refined grains leads to an improvement of dielectric 2 properties due to an enhancement of densification. This work may provide a new strategy to design ferroelectric materials with enhanced properties.

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Section: Dielectric Properties Of Sintered Ceramicsmentioning

confidence: 84%

Enhancement of dielectric properties of lead-free BCZT ferroelectric ceramics by grain size engineering

Hanani

Mezzane

Amjoud

et al. 2019

Superlattices and Microstructures

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“…This is reflected in strong domain switching and development of high piezoelectric response under electric field application, but as well a strong relaxation of the aligned domain structure and a corresponding reduction in response, when the electric field is reduced (Ehmke, Glaum, Hoffman, Blendell, & Bowman, ; Ehmke, Glaum, Hoffman, Blendell, & Bowman, ). Although the exact influence of grain size on the piezoelectric behavior of BCZT is unascertained, there are indications that there is a positive correlation between enhanced piezoelectric performance and the movement of 90° domain walls in larger grains (Arlt, ; Ghayour & Abdellahi, ). The change in mechanical constraints as imposed by a variation in average grain size does not overrule the electrical “softness” for the composition investigated in the present study.…”

Section: Discussionmentioning

confidence: 99%

Biocompatibility of (Ba,Ca)(Zr,Ti)O₃ piezoelectric ceramics for bone replacement materials

et al. 2019

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Total joint replacement implants are generally designed to physically mimic the biological environment to ensure compatibility with the host tissue. However, implant instability exposes patients to long recovery periods, high risk for revision surgeries, and high expenses. Introducing electrical stimulation to the implant site to accelerate healing is promising, but the cumbersome nature of wired devices is detrimental to the implant design. We propose a novel strategy to stimulate cells at the implant site by utilizing piezoelectric ceramics as electrical stimulation sources. The inherent ability of these materials to form electric surface potentials under mechanical load allows them to act as internal power sources. This characteristic is commonly exploited in non‐biomedical applications such as transducers or sensors. We investigate calcium/zirconium‐doped barium titanate (BCZT) ceramics in an in vitro environment to determine their potential as implant materials. BCZT exhibits low cytotoxicity with human osteoblast and endothelial cells as well as high piezoelectric responses. Microstructural adaptation was identified as a route for optimizing piezoelectric behavior. Our results show that BCZT is a promising system for biomedical applications. Its characteristic ability to autonomously generate electric surface potentials opens the possibility to functionalize existing bone replacement implant designs to improve implant ingrowth and long‐term stability.

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“…Many investigations have been done to understand the origin of these dielectric properties and their relation with CCTO crystal structure. Several reviews focusing on different perovskite materials and their dielectric properties such as barium titanate (BaTiO 3 ) [17] and Lead titanate (PbTiO 3 ) [18] have been reported recently. In 2016, Ahmadipour et al reported CCTO ceramics and films fabrication, factors influencing its dielectric properties and its sensing applications.…”

Section: Introductionmentioning

confidence: 99%

From Synthesis to Applications: Copper Calcium Titanate (CCTO) and its Magnetic and Photocatalytic Properties

et al. 2019

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Investigations focusing on electrical energy storage capacitors especially the dielectric ceramic capacitors for high energy storage density are attracting more and more attention in the recent years. Ceramic capacitors possess a faster charge‐discharge rate and improved mechanical and thermal properties compared with other energy storage devices such as batteries. The challenge is to obtain ceramic capacitors with outstanding mechanical, thermal and storage properties over large temperature and frequencies ranges. ABO 3 as a type of perovskites showed a strong piezoelectric, dielectric, pyroelectric, and electro‐optic properties useful as energy storage and environmental devices. CaCu 3 Ti 4 O 12 (CCTO) perovskite with cubic lattice (Im3 symmetry) was discovered to have a colossal dielectric constant (10 4 ) that is stable over a wide range of frequencies (10 Hz–1 MHz) and temperature independence (100–300 K). The origin of this high dielectric constant is not fully established, specially because it is the same for single crystal and thin films. In this review, the history of CCTO will be introduced. The synthesis and the sintering approaches, the dopant elements used as well as the applications of CCTO will be reported. In addition to dielectrical properties useful to energy storage devices; CCTO could serve as photocatalytic materials with a very good performance in visible light.

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A brief review of the effect of grain size variation on the electrical properties of BaTiO3-based ceramics

Cited by 93 publications

References 142 publications

Enhancement of dielectric properties of lead-free BCZT ferroelectric ceramics by grain size engineering

Enhancement of dielectric properties of lead-free BCZT ferroelectric ceramics by grain size engineering

Biocompatibility of (Ba,Ca)(Zr,Ti)O₃ piezoelectric ceramics for bone replacement materials

From Synthesis to Applications: Copper Calcium Titanate (CCTO) and its Magnetic and Photocatalytic Properties

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A brief review of the effect of grain size variation on the electrical properties of BaTiO3-based ceramics

Cited by 93 publications

References 142 publications

Enhancement of dielectric properties of lead-free BCZT ferroelectric ceramics by grain size engineering

Enhancement of dielectric properties of lead-free BCZT ferroelectric ceramics by grain size engineering

Biocompatibility of (Ba,Ca)(Zr,Ti)O3 piezoelectric ceramics for bone replacement materials

From Synthesis to Applications: Copper Calcium Titanate (CCTO) and its Magnetic and Photocatalytic Properties

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Biocompatibility of (Ba,Ca)(Zr,Ti)O₃ piezoelectric ceramics for bone replacement materials