Boundary structural transition and grain growth behavior in BaTiO3 with Nd2O3 doping and oxygen partial pressure change

An, Se-Min; Kang, Suk–Joong L.

doi:10.1016/j.actamat.2010.11.062

Cited by 65 publications

(42 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Interestingly, a non-stoichiometric (higher) ratio of Zn:O is observed for sintering in presence of bound water, whereas the ratio of Zn:O is approximately stoichiometric under dry sintering condition [19]. Surprisingly, a stoichiometric ratio of Ti:O at the grain boundary was attributed to normal grain growth, whereas the non-stoichiometric ratio (higher Ti:O ratio) was observed for abnormal grain growth in BaTiO 3 [66,67]. Thus, the increased ratio of Zn:O might result from hydroxide complexions at the grain boundaries which could form under aqueous sintering condition.…”

Section: Effect Of Surface Bound Water On Development Of Morphologicamentioning

confidence: 53%

FAST/SPS sintering of nanocrystalline zinc oxide—Part II: Abnormal grain growth, texture and grain anisotropy

Dargatz

González‐Julián

Bram

et al. 2016

Journal of the European Ceramic Society

View full text Add to dashboard Cite

Section: Effect Of Surface Bound Water On Development Of Morphologicamentioning

confidence: 53%

FAST/SPS sintering of nanocrystalline zinc oxide—Part II: Abnormal grain growth, texture and grain anisotropy

Dargatz

González‐Julián

Bram

et al. 2016

Journal of the European Ceramic Society

View full text Add to dashboard Cite

“…The formation of a solid solution, for instance with BaTiO 3 , seems to buffer against grain coarsening. According to previous reports, immobile oxygen vacancies can reduce grain boundary mobility …”

Section: Resultsmentioning

confidence: 73%

The effect of Fe‐acceptor doping on the electrical properties of Na_1/2Bi_1/2TiO₃ and 0.94 (Na_1/2Bi_1/2)TiO₃–0.06 BaTiO₃

et al. 2019

View full text Add to dashboard Cite

Na1/2Bi1/2TiO3 (NBT) based ceramics are amongst the most promising lead‐free ferroelectric materials. It was expected that the defect chemistry and the effect of doping of NBT would be similar to that observed for lead based materials, however, acceptor doping does not lead to ferroelectric hardening. Instead, high oxygen ionic conductivity is induced. Nevertheless, for solid solutions with BaTiO3 (BT), which are more relevant with respect to ferroelectric applications, such a drastic change of electrical properties has not been observed so far. To rationalize the difference in defect chemistry between NBT and its solid solution 94(Na1/2Bi1/2TiO3)–0.06 BaTiO3 (NBT–6BT) compositions with different concentrations of Fe‐dopant were investigated. The study illustrates that the materials exhibit very similar behavior to NBT, and extraordinarily high oxygen ionic conductivity could also be induced in NBT–6BT. The key difference between NBT–6BT and NBT is the range of the dependence of ionic conductivity with dopant concentration. Previous studies of NBT–6BT have not reached sufficiently high dopant concentrations to observe high conductivity. In consequence, the same defect chemical model can be applied to both NBT and its solid solutions. This will help to rationalize the effect of doping on ferroelectric properties of NBT‐ceramics and defect chemistry related degradation and fatigue.

show abstract

“…In the case of grain growth, the correlation between the boundary faceting and the boundary migration, as well as grain growth behavior, has been much more carefully studied . As in the case of densification, Figure indicates the presence of a critical driving force for grain growth in a sample with faceted boundaries.…”

Section: Fundamentals Of Sintering and Microstructure Evolutionmentioning

confidence: 99%

“…The interaction between grains and pores, although long studied, remains a fundamental challenge in sintering science and is the primary reason that the densification behavior of crystalline materials is not as well predicted as the densification behavior of amorphous materials. Recent studies on densification and grain growth in porous ceramics, in particular, for solid‐state sintering, demonstrated critical effects of the interface structure . Various implications of interface structure on densification kinetics and microstructural evolution remain and should continue to be an active area of research.…”

Section: Challenges and Outlookmentioning

confidence: 99%

Current understanding and future research directions at the onset of the next century of sintering science and technology

2017

View full text Add to dashboard Cite

Sintering and accompanying microstructural evolution is inarguably the most important step in the processing of ceramics and hard metals. In this process, an ensemble of particles is converted into a coherent object of controlled density and microstructure at an elevated temperature (but below the melting point) due to the thermodynamic tendency of the particle system to decrease its total surface and interfacial energy. Building on a long development history as a major technological process, sintering remains among the most viable methods of fabricating novel ceramics, including high surface area structures, nanopowder-based systems, and tailored structural and functional materials. Developing new and perfecting existing sintering techniques is crucial to meet ever-growing demand for a broad range of technologically significant systems including, for example, fuel and solar cell components, electronic packages and elements for computers and wireless devices, ceramic and metal-based bioimplants, thermoelectric materials, materials for thermal management, and materials for extreme environments.In this study, the current state of the science and technology of sintering is presented. This study is, however, not a comprehensive review of this extremely broad field. Furthermore, it only focuses on the sintering of ceramics. The fundamentals of sintering, including the thermodynamics and kinetics for solid-stateand liquid-phase-sintered systems are described. This study summarizes that the sintering of amorphous ceramics (glasses) is well understood and there is excellent agreement between theory and experiments. For crystalline materials, attention is drawn to the effect of the grain boundary and interface structure on sintering and microstructural evolution, areas that are expected to be significant for future studies. Considerable emphasis is placed on the topics of current research, including the sintering of composites, multilayered systems, microstructure-based models, multiscale models, sintering under external stresses, and innovative and novel sintering approaches, such as field-assisted sintering. This study includes the status of these subfields, the outstanding challenges and opportunities, and the outlook of progress in sintering research. Throughout the manuscript, we highlight the important lessons learned from sintering fundamentals and their implementation in practice.This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

show abstract

Boundary structural transition and grain growth behavior in BaTiO3 with Nd2O3 doping and oxygen partial pressure change

Cited by 65 publications

References 42 publications

FAST/SPS sintering of nanocrystalline zinc oxide—Part II: Abnormal grain growth, texture and grain anisotropy

FAST/SPS sintering of nanocrystalline zinc oxide—Part II: Abnormal grain growth, texture and grain anisotropy

The effect of Fe‐acceptor doping on the electrical properties of Na_1/2Bi_1/2TiO₃ and 0.94 (Na_1/2Bi_1/2)TiO₃–0.06 BaTiO₃

Current understanding and future research directions at the onset of the next century of sintering science and technology

Contact Info

Product

Resources

About

Boundary structural transition and grain growth behavior in BaTiO3 with Nd2O3 doping and oxygen partial pressure change

Cited by 65 publications

References 42 publications

FAST/SPS sintering of nanocrystalline zinc oxide—Part II: Abnormal grain growth, texture and grain anisotropy

FAST/SPS sintering of nanocrystalline zinc oxide—Part II: Abnormal grain growth, texture and grain anisotropy

The effect of Fe‐acceptor doping on the electrical properties of Na1/2Bi1/2TiO3 and 0.94 (Na1/2Bi1/2)TiO3–0.06 BaTiO3

Current understanding and future research directions at the onset of the next century of sintering science and technology

Contact Info

Product

Resources

About

The effect of Fe‐acceptor doping on the electrical properties of Na_1/2Bi_1/2TiO₃ and 0.94 (Na_1/2Bi_1/2)TiO₃–0.06 BaTiO₃