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Journal of Advanced Ceramics
Scopus
ISSN 2226-4108 · Tsinghua University Press · 978 artikel di indeks
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Artikel Jurnal
High-entropy ceramics: From paradigm formation to ordered development
High-entropy ceramics (HECs), defined as single-phase inorganic solid solutions comprising five or more principal elements in equimolar or near-equimolar ratios, have emerged as a frontier and hotspot in materials science over the past decade. Their expansive compositional space and diverse crystal…
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Artikel Jurnal
Chemical composition regulation to enhance the energy storage property of the lead-free relaxor ferroelectric
As a critical research direction in dielectric energy storage applications, achieving a synergistic balance between a high breakdown strength (Eb) and high polarization remains a significant challenge for lead-free relaxor ferroelectrics. In this work, we proposed a rational chemical design…
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Artikel Jurnal
Multiscale particle grading of monodisperse spherical Al2O3 ceramics: Sintering activation energy and densification mechanisms
To address the limitations of existing research on ceramic particle grading regarding powder agglomeration and mechanistic depth, this study employed four types of uniform, monodisperse spherical α-Al2O3 powders. A series of grading systems, ranging from binary to quaternary, were constructed to…
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Artikel Jurnal
Li+ and Nb5+ codoped BNT-based ceramic with ultrahigh electrostrain under a moderate electric field
Lead-free piezoceramics have been an important research topic over the past two decades, aiming to replace Pb-based piezoceramics for sensor and actuator applications. In this study, LiNbO3 (LN) doping was employed in (1−x)Bi1/2(Na0.8K0.2)1/2Ti0.99Nb0.01O3–xLN ceramics near its morphotropic phase…
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Artikel Jurnal
Dense core–shell eutectic Zr–Ta–O as a sacrificial layer of YSZ topcoat for enhanced CMAS resistance via dynamic sealing and self-removal
Thermal barrier coatings (TBCs) are critical in protecting hot-section components. A double-layered TBC system comprising a eutectic Zr–Ta–O (ZTO) core–shell structured top layer and a yttria-stabilized zirconia (YSZ) underlayer was fabricated via atmospheric plasma spraying (APS). This study…
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Artikel Jurnal
Secondary cold isostatic pressing-assisted pressureless sintering of high-density h-BN ceramics
Owing to its strong B–N covalent bonds and inferior dissolution–precipitation characteristics in selected liquid phases, densification of h-BN ceramics is generally achieved via pressure-assisted sintering techniques. Herein, high-density h-BN ceramics were fabricated by a secondary cold isostatic…
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Artikel Jurnal
Intergrown columnar clusters toughening silicon nitride ceramics
Silicon nitride (Si3N4) is an excellent candidate for engineering ceramics; however, its toughness and hardness remain fundamentally constrained by the inherent limitations arising from the incompatible α-phase (characterized by high hardness) and β-phase (characterized by high toughness). Herein…
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Artikel Jurnal
Enhancing microwave dielectric properties of Li2TiO3 ceramics via monoclinic–cubic phase transition control
Lightweight β-Li2TiO3 ceramics are promising microwave dielectrics for the large-scale deployment of 5.5G extremely large antenna arrays (ELAAs). However, their practical application is hindered by the limited Q×f value (where quality factor Q = 1/dielectric loss (tanδ), and f represents the…
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Artikel Jurnal
Creating nanosized engineered domains in 2D clamped BaTiO3 ceramics by in situ single-grain poling
Piezoelectrics, which can convert mechanical-electrical energy or vice versa, are widely used in sensors, transducers, and actuators. It has been well demonstrated that engineered domains with smaller sizes can contribute to higher piezoelectric performance. However, poling engineered domains with…
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Artikel Jurnal
Defect regulation and photodarkening suppression in Yb:Y2O3 laser ceramics through charge-compensated Zr–Ca co-doping strategy
Sesquioxide ceramics are promising candidates for high-power laser applications, yet achieving high optical quality remains challenging. This is primarily due to rapid grain-boundary mobility during the final stage of sintering and pump-induced photodarkening under high-power excitation…
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Artikel Jurnal
Achieving superior thermal stability in vat photopolymerized silica-based ceramic cores via kyanite-induced expansion compensation
Vat photopolymerization (VPP) three-dimensional (3D) printing has emerged as a predominant technology for fabricating complex-shaped ceramic cores used in aeroengine hollow turbine blades. However, the inherent limitations of VPP 3D printing-fabricated silica-based cores, such as excessive…
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Artikel Jurnal
Ultra-high piezoelectric properties of BiFeO3–BaTiO3 lead-free piezoelectric ceramics enabled by a one-step sintering process
BiFeO3–BaTiO3 ceramics have been shown to possess considerable promise in the domain of high-temperature lead-free piezoelectric applications, a property attributable to their elevated Curie temperature and superior piezoelectric properties. However, the inherent issue of high leakage current…
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Artikel Jurnal
Mechanism of improved breakdown strength and energy storage performance in Cd-doped Sr0.775Bi0.15TiO3 relaxor ferroelectrics based on a multi-scale synergistic optimization strategy
Sr0.775Bi0.15TiO3 ceramics with linear-like relaxor ferroelectric behavior are promising dielectric energy storage materials. Improving breakdown strength (BDS) is key to optimizing its energy storage performance and expanding its application. Herein, a multi-scale synergistic optimization strategy…
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Artikel Jurnal
Nanoparticle-induced phase transformation boosts mechanical and ablation performance of C/C–ZrC–SiC composites
The intrinsic brittleness and strong chemical bonds in ceramics are persistently challenging and hinder dislocation nucleation and atomic slip to accommodate strains. This characteristic impedes plastic deformation for ceramic matrix composites when withstanding dynamic mechanical loading and…
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Artikel Jurnal
First-principles insights into solid solution mechanisms of doped Gd2Zr2O7 and guides to develop novel thermal barrier coating materials
Gd2Zr2O7 (GZO)-based compounds are currently one of the most promising materials for thermal barrier coatings (TBCs), in which some dopants are introduced. The dopants induce changes in the GZO lattice and improve the properties; however, the underlying mechanisms related to the solid solution…
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Artikel Jurnal
Enhancing densification and mechanical performance of B4C ceramics using Y3Si2C2 as a novel sintering additive
Boron carbide (B4C) is a highly strong covalent ceramic material with a low surface diffusion coefficient, making it extremely difficult to consolidate at low temperature. Therefore, the development of effective sintering additives that enable low-temperature, high-density consolidation while…
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Artikel Jurnal
Multicomponent hexaborides with high infrared emissivity and low thermal conductivity for ultra-high temperature thermal protection applications
As the flight speed of hypersonic vehicles increases, the airframe temperature rises sharply, which puts forward greater demands for ultrahigh temperature thermal protection materials with high infrared emissivity and low thermal conductivity. In this work, LaB6, (La1/3Eu1/3Ca1/3)B6 (MEB6), and…
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Artikel Jurnal
High toughness and strong microwave absorption of layered Si3N4–SiC/BN ceramics loaded with different SiC contents
Layered ceramics can simultaneously achieve high toughness and strong microwave absorption. In this work, layered Si3N4–SiC/boron nitride (BN) ceramics were prepared by tape casting and hot pressing, and the effect of microsized SiC content on their mechanical and microwave absorption properties…
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Artikel Jurnal
Pb(Mg1/3Nb2/3)O3-induced oxygen octahedral distortions and domain growth for concurrent enhancement of multiple parameters in PNN–PZT
Enhancing key parameters such as the piezoelectric coefficient (d33), Curie temperature (TC), electromechanical coupling coefficient (kp), and dielectric loss (tanδ) is crucial for improving the overall performance of piezoelectric ceramics. However, the trade-off relationships among these…