Journal of Advanced Ceramics最新文献

{"title":"Accuracy controlling and mechanical behaviors of precursor-derived SiOC ceramic microlattices by projection micro stereolithography (PμSL) 3D printing","authors":"Ruyue Su, Jingyi Chen, Xueqin Zhang, Xiong Gao, Wenqing Wang, Ying Li, Rujie He","doi":"10.26599/jac.2023.9220818","DOIUrl":"https://doi.org/10.26599/jac.2023.9220818","url":null,"abstract":"Precursor-derived SiOC ceramic (PDC-SiOC) microlattices exhibit excellent oxidation resistance, high-temperature stability, as well as superior mechanical properties. However, the printing accuracy of PDC-SiOC microlattices by 3D printing is still limited, and the mechanical properties of PDC-SiOC microlattices have not been studied systematically. Here, PDC-SiOC octet microlattices were fabricated by projection micro stereolithography (PμSL) 3D printing, and photoabsorber (Sudan III) 's effect on accuracy was systematically analyzed. The results showed that the addition of Sudan III improved the printing accuracy significantly. Then the ceramization process of the green body was analyzed in detail. The order of the green body decreased and most of their chemical bonds were broken during pyrolysis. After that, PDC-SiOC microlattices with different truss diameters in the 52-220 μm range were fabricated and their mechanical properties were investigated. The PDC-SiOC microlattices with 52 μm truss diameter exhibited a higher compression strength (31 MPa) than those with bigger truss diameters. The size effect among PDC-SiOC microlattices was analyzed. Our work provides a deeper insight into the manufacturing of PDC-SiOC micro-scaled architectures by 3D printing and paves a path to the research of size effect in ceramic structures.","PeriodicalId":14862,"journal":{"name":"Journal of Advanced Ceramics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135654195","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced piezo-catalysis in ZnO rods with built-in nanopores","authors":"Ting Li, Wenjin Hu, Changxin Tang, Zihao Zhou, Zhiguo Wang, Longlong Shu","doi":"10.26599/jac.2023.9220819","DOIUrl":"https://doi.org/10.26599/jac.2023.9220819","url":null,"abstract":"Strategies to improve the efficiency of piezoelectric catalysis have long focused on piezo-optical coupling and the construction of heterojunctions. However, it is a challenge to reinforce the performance of piezoelectric catalysis in a single material. Herein the built-in nanopores in single-crystal ZnO rods are employed to form stress to intensify the piezo-catalytic efficiency. The piezo-catalytic efficiency of ZnO rods with built-in nanopores (holey ZnO NRs) for degrading dyes was about 1.7 times that of ZnO rods without built-in nanopores (ZnO NRs). The X-ray diffraction and Raman peaks of holey ZnO NRs appeared blue-shifted in comparison to ZnO NRs, uncovering the existence of tensile stress in holey ZnO NRs. The piezoelectric coefficient d₃₃ of holey ZnO NRs increased by 1.92 times, triggering the amplification of piezoelectric catalytic property. Additionally, the piezoelectric current, carrier lifetime, and diffusion length of holey ZnO NRs were larger than that of ZnO NRs, respectively. These factors all contribute to the enhanced piezoelectric catalytic efficiency of holey ZnO NRs. This work demonstrates that the method of induced stress with built-in nanopores is a promising strategy for improving the piezoelectric catalytic efficiency of single-crystal ZnO rods.","PeriodicalId":14862,"journal":{"name":"Journal of Advanced Ceramics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135708160","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Colossal permittivity and ultralow dielectric loss in Nb-doped SrTiO ₃ ceramics","authors":"Jinghan Cai, Junlei Qi, Yueyang Yang, Xinyue Zhang, Yuan-Hua Lin","doi":"10.26599/jac.2023.9220815","DOIUrl":"https://doi.org/10.26599/jac.2023.9220815","url":null,"abstract":"Defect engineering has been applied to prepare materials with modifiable dielectric properties. SrTiNb_xO₃ (x=0, 0.003, 0.006, 0.009, 0.012) ceramics were synthesized using the traditional solid-state reaction method and sintered in a reducing atmosphere. All samples show excellent dielectric properties with giant permittivity (>3.5×10⁴) and low dielectric loss (<0.01). SrTiNb_0.003O₃ ceramic exhibits a colossal permittivity of 4.6×10⁴ and an ultralow dielectric loss of 0.005 (1 kHz, room temperature) as well as great temperature stability in the range of -60～160℃. The mechanism of the presented CP properties is investigated by conducting XPS and analyzing activation energies. The results indicate that the introduction of Nb⁵⁺ and the reducing sintering atmosphere together generated the formation of Ti³⁺ and <em>V ^∙∙_O</em>. These defects further form <em>Ti'_Ti−</em><em>V ^∙∙</em>_O−<em>Ti'_Ti</em> defect dipoles, contributing to the coexisting giant permittivity and low dielectric loss in STN ceramics.","PeriodicalId":14862,"journal":{"name":"Journal of Advanced Ceramics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135606032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Flash sintering of high-purity alumina at room temperature","authors":"Yueji Li, Qingguo Chi, Ziyang Yan, Nianping Yan, Jinling Liu, Rongxia Huang, Xilin Wang","doi":"10.26599/jac.2023.9220816","DOIUrl":"https://doi.org/10.26599/jac.2023.9220816","url":null,"abstract":"For the first time, the flash sintering (FS) of high-purity alumina at room temperature, which was previously considered unachievable due to its low electrical conductivity, was conducted herein. The electrical arc originating from surface flashover was harnessed to induce FS at room temperature and low air pressure. The successful FS of high-purity alumina was realized at 60 kPa under the arc constraint, resulting in a notable relative density of the alumina sample of 98.7%. The electric–thermal coupling between the arc and high-purity alumina sample during the arc-induced FS process was analyzed via the finite element simulation method. The results revealed the thermal and electrical effects of the arc on the sample, which ultimately enhance the electrical conductivity of the alumina sample. The formation of a conductive channel on the sample surface, a result of increased electrical conductivity, was the pivotal factor in achieving FS in high-purity alumina at room temperature. The arc constraint technique can be applied to numerous materials, such as ionic conductors, semiconductors, and even insulators, under room-temperature and low-air-pressure conditions.","PeriodicalId":14862,"journal":{"name":"Journal of Advanced Ceramics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135606030","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tunable polarization-drived high energy storage performances in flexible PbZrO ₃ films by growing Al ₂O ₃ nanolayers","authors":"Chao Yin, Tiandong Zhang, Zhuangzhuang Shi, Bowen Zhang, Changhai Zhang, Qingguo Chi","doi":"10.26599/jac.2023.9220814","DOIUrl":"https://doi.org/10.26599/jac.2023.9220814","url":null,"abstract":"In recent years, PbZrO₃ (PZO) films have become a favorable electric storage material due to the unique electric field-induced phase transition behavior, but the severe hysteresis effect leads to the low energy storage density and efficiency. In this work, inserting Al₂O₃(AO) insulation nanolayers is proposed to tune the polarization behavior of flexible PZO films, anticipating the optimization of energy storage performances. The results show that the thickness of the AO nanolayers has a deep influence on the polarization behavior of PZO films, PZO/AO/PZO (PAP) sandwiched films with 8 nm-AO interlayer deliver relaxor ferroelectric-like polarization instead of antiferroelectric counterpart. To further utilize AO nanolayers as top/bottom layers, a linear-like polarization and highest breakdown strength are achieved in the AO/PZO/AO/PZO/AO (APAPA8) multilayer films, leading to both high discharged energy storage density of 35.2 J/cm³ and efficiency of 92.9%, as well as excellent fatigue and bending endurance, good temperature and frequency stability. The tunable polarization induced by growing AO nanolayers makes antiferroelectric PZO films have great potential to be used as the energy storage dielectrics.","PeriodicalId":14862,"journal":{"name":"Journal of Advanced Ceramics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135606188","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synergically improved energy storage performance and stability in sol&amp;ndash;gel processed BaTiO ₃/(Pb,La,Ca)TiO ₃/BaTiO ₃ tri-layer films with a crystalline engineered sandwich structure","authors":"Jinpeng Liu, Ying Wang, Hanfei Zhu, Hongyu Luo, Xiao Zhai, Yu Huan, Jing Yan, Kun Wang, Chao Liu, Hongbo Cheng, Jun Ouyang","doi":"10.26599/jac.2023.9220821","DOIUrl":"https://doi.org/10.26599/jac.2023.9220821","url":null,"abstract":"Achieving an excellent energy storage performance, together with a high cycling reliability, is desirable for expanding the technological applications of ferroelectric dielectrics. However, in a well-crystallized ferroelectric material, the concomitant high polarizability and low polarization-saturation field have led to a square-shaped polarization-electric field loop, fatally impairing both recoverable energy density (<em>W</em>_rec) and efficiency (<em>η</em>). Nanocrystalline ferroelectric films with a macroscopically amorphous structure have shown an improved <em>W</em>_rec and <em>η</em>, but their much-lower polarizability demands an extremely high electric field to achieve such performances, which is undesirable from economical viewpoints. Here, we propose a strategy to boost the energy storage performances and stabilities of ferroelectric capacitors simultaneously by constructing a tri-layer film in which a well-crystallized ferroelectric layer was sandwiched by two pseudo-linear dielectric layers with a dominant amorphous structure. In sol-gel-derived BaTiO₃/(Pb,La,Ca)TiO₃/BaTiO₃ (BTO/PLCT/BTO) tri-layer films, we show that the above design is realized via a rapid thermal annealing which fully crystallized the middle PLCT layer while left the top/bottom BTO cap layers in a poor crystallization status. This sandwiched structure is endowed with an enhanced maximum polarization while a small remnant one, and a much-delayed polarization saturation, which corresponds to a large <em>W</em>_rec~80 J/cm³ and a high <em>η~</em>86%. Furthermore, the film showed an outstanding cycling-stability: its <em>W</em>_rec and <em>η </em>remain essentially unchanged after 10⁹ electric cycles (D<em>W</em>/<em>W<</em>4%, D<em>η</em>/<em>η<</em>2%). These good energy storage characteristics have proved the effectiveness of our proposed strategy, paving a way for the utilization of sandwiched films in applications of electric power systems and advanced pulsed-discharge devices.","PeriodicalId":14862,"journal":{"name":"Journal of Advanced Ceramics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135849569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tensile strength and damage of open-cell ceramic foams under cylindrical splitting test","authors":"Yajie Dai, J. Hubálková, C. Voigt, M. Abendroth, Xiong Liang, Wen Yan, Ya-wei Li, C. G. Aneziris","doi":"10.26599/jac.2023.9220803","DOIUrl":"https://doi.org/10.26599/jac.2023.9220803","url":null,"abstract":"","PeriodicalId":14862,"journal":{"name":"Journal of Advanced Ceramics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49035812","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Efficient fabrication of light C _f/SiHfBOC composite with excellent thermal shock resistance and ultra-high temperature ablation up 1800 &amp;deg;C","authors":"Yang Lyu, Zhihong Han, Guangdong Zhao, Yuan Cheng, Shanbao Zhou, Xinghong Zhang, Guiqing Chen, Wenbo Han","doi":"10.26599/jac.2023.9220808","DOIUrl":"https://doi.org/10.26599/jac.2023.9220808","url":null,"abstract":"In this paper, a high-yield Hf-modified SiHfBOC ceramic precursor was developed, and a high-pressure assisted impregnation pyrolysis method was proposed to achieve the preparation of 3D PyC-C_f/SiHfBOC composites. This high-pressure assisted impregnation method significantly improves the impregnation filling effect of the precursor in and between fiber bundles compared to dozens of traditional impregnation cycles. After undergoing just 9 PIP cycles, the composites achieved a relative density of approximately 90% and a density of 1.64 g/cm³. The critical temperature difference of 3D PyC-C_f/SiHfBOC composites after the shock of RT-1000 °C is as high as 650 °C, which is twice that of the traditional ceramic material, showing good thermal shock resistance. Under the effect of Hf modification, a dense HfO₂-SiO₂ oxide layer (thickness 93μm) was formed in situ on the surface of the 3D PyC-C_f/SiHfBOC composites, effectively preventing further erosion of the composite matrix by high-temperature oxidation gas. Even in the ultra-high temperature oxygen-containing environment at 1800 °C, it still exhibits an excellent non-ablative result (with a linear ablation rate of 0.83×10^-4 mm·s^-1). This work not only enriches the basic research on lightweight ultra-high temperature ceramic composites converted from Hf ceramic precursors but also provides strong technical support for their application in ultra-high temperature non-ablative thermal protection materials for high-speed aircraft.","PeriodicalId":14862,"journal":{"name":"Journal of Advanced Ceramics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135387617","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Oxidation behavior of boron-containing (Zr,Ti)C\u0000 \u0000 x\u0000 B\u0000 \u0000 y\u0000 solid solution ceramic at 1600 °C in air","authors":"H. Lun, Yi-hui Zeng, Xiang Xiong, Houbu Li","doi":"10.26599/jac.2023.9220802","DOIUrl":"https://doi.org/10.26599/jac.2023.9220802","url":null,"abstract":"","PeriodicalId":14862,"journal":{"name":"Journal of Advanced Ceramics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48447721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Revisiting traditional and modern trends in versatile 2D nanomaterials: Synthetic strategies, structural stability, and gas-sensing fundamentals","authors":"Mobashar Hassan, Siwei Liu, Zhiping Liang, Shahid Hussain, Junlin Liu, Guiwu Liu, Guanjun Qiao","doi":"10.26599/jac.2023.9220810","DOIUrl":"https://doi.org/10.26599/jac.2023.9220810","url":null,"abstract":"Two-dimensional nanomaterials (2DNMs) have attracted significant research interest due to their outstanding structural properties, which include unique electrical nanostructures, large surface areas, and high surface reactivity. These adaptable materials have outstanding physicochemical characteristics, making them useful in a variety of applications such as gas-sensing, electronics, energy storage, and catalysis. Extensive research has been conducted in the pursuit of high-performance room-temperature (RT) gas sensors with good selectivity, high sensitivity, long-term stability, and rapid response/recovery kinetics. Metal oxides, transition metal chalcogenides, MXenes, graphene, phosphorene, and boron nitride have all been discovered as 2DNMs with strong potential for gas sensors. This review presents an in-depth analysis of current advances in 2DNM research. It includes synthetic techniques, structural stabilities, gas-sensing mechanisms, critical performance parameters, and factors influencing the gas-sensing capabilities of 2DNMs. Furthermore, the present study emphasizes structural engineering and optimization methodologies that improve gas-sensing performance. It also highlights current challenges and outlines future research directions in the domain of tailoring 2DNMs for advanced RT gas sensors. This systematically designed comprehensive review article aims to provide readers with profound insights into gas detection, thereby inspiring the generation of innovative ideas to develop cutting-edge 2DNMs-based gas sensors.","PeriodicalId":14862,"journal":{"name":"Journal of Advanced Ceramics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134995040","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}