Singh Center for Nanotechnology
University of Tennessee, Knoxville
Iowa State University
University of Arkansas, Fayetteville
Montana Tech Library
University of Kentucky
Missouri University of Science and Technology
Enhanced Electrical Property Of Graphite/Al2O3 Composite Fabricated By Reductive Sintering Of Gel-Casted Body Using Cross-Linked Epoxy Polymer,
2022
Department of Life Science and Applied Chemistry, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya, Aichi 466-8555, Japan
Enhanced Electrical Property Of Graphite/Al2O3 Composite Fabricated By Reductive Sintering Of Gel-Casted Body Using Cross-Linked Epoxy Polymer, Yoshiaki Funahashi, Yunzi Xin, Kunihiko Kato, Huu Hien Nguyen, Takashi Shirai
Journal of Advanced Ceramics
In the present study, graphite/alumina composites are fabricated via reductive sintering of gel-casted green bodies with structurally controlled cross-linked epoxy polymers for the first time. The cross-linking degrees of polymers are tuned by the amount ratio of epoxy monomer/polyvinyl alcohol cross-linker utilized in gel-casting process. Superior electrical properties with respect to 5-fold enhanced electrical conductivity and 2-fold higher carrier mobility are successfully achieved in graphite/alumina composite fabricated from cross-linked epoxy polymer, whose phenomenon is attributed to the excellent conductive path in ceramic matrix established by highly uniform network with improved graphitization degree.
Texture And Anisotropy Of Hot-Pressed H-Bn Matrix Composite Ceramics With In Situ Formed Yag,
2022
Key Laboratory of Advanced Structural-Functional Integration Materials & Green Manufacturing Technology, Harbin Institute of Technology, Harbin 150001, China;Institute for Advanced Ceramics, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
Texture And Anisotropy Of Hot-Pressed H-Bn Matrix Composite Ceramics With In Situ Formed Yag, Zhuo Zhang, Xiaoming Duan, Zhuo Tian, Yujin Wang, Lan Wang, Lei Chen, Baofu Qiu, Delong Cai, Peigang He, Dechang Jia, Yu Zhou
Journal of Advanced Ceramics
Textured hexagonal boron nitride (h-BN) matrix composite ceramics were prepared by hot- pressing using different contents of 3Y2O3-5Al2O3 (molar ratio of 3:5) as the sintering additive. During hot-pressing, the liquid Y3Al5O12 (YAG) phase showing good wettability to h-BN grains was in situ formed through the reaction between Y2O3 and Al2O3, and a coherent relationship between h-BN and YAG was observed with [010]h-BN//[1¯11]YAG and (002)h-BN//(321)YAG. In the YAG liquid phase environment formed during hot-pressing, plate-like ...
Achieving Ultra-Broadband Electromagnetic Wave Absorption In High-Entropy Transition Metal Carbides (He Tmcs),
2022
Science and Technology on Advanced Functional Composite Laboratory, Aerospace Research Institute of Materials & Processing Technology, Beijing 100076, China
Achieving Ultra-Broadband Electromagnetic Wave Absorption In High-Entropy Transition Metal Carbides (He Tmcs), Weiming Zhang, Huimin Xiang, Fu-Zhi Dai, Biao Zhao, Shijiang Wu, Yanchun Zhou
Journal of Advanced Ceramics
Electronic devices pervade everyday life, which has triggered severe electromagnetic (EM) wave pollution. To face this challenge, developing EM wave absorbers with ultra-broadband absorption capacity is critically required. Currently, nano-composite construction has been widely utilized to realize impedance match and broadband absorption. However, complex experimental procedures, limited thermal stability, and interior oxidation resistance are still unneglectable issues. Therefore, it is appealing to realize ultra-broadband EM wave absorption in single-phase materials with good stability. Aiming at this target, two high-entropy transition metal carbides (HE TMCs) including (Zr,Hf,Nb,Ta)C (HE TMC-2) and (Cr,Zr,Hf,Nb,Ta)C (HE ...
Anisotropic, Biomorphic Cellular Si3N4 Ceramics With Directional Well-Aligned Nanowhisker Arrays Based On Wood-Mimetic Architectures,
2022
State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, China
Anisotropic, Biomorphic Cellular Si3N4 Ceramics With Directional Well-Aligned Nanowhisker Arrays Based On Wood-Mimetic Architectures, Songsong Xu, Xiaonan Zhou, Qiang Zhi, Junjie Gao, Liucheng Hao, Zhongqi Shi, Bo Wang, Jianfeng Yang, Kozo Ishizaki
Journal of Advanced Ceramics
Inspired by the transport behavior of water and ions through the aligned channels in trees, we demonstrate a facile, scalable approach for constructing biomorphic cellular Si3N4 ceramic frameworks with well-aligned nanowhisker arrays on the surface of directionally aligned microchannel alignments. Through a facile Y(NO3)3 solution infiltration into wood-derived carbon preforms and subsequent heat treatment, we can faultlessly duplicate the anisotropic wood architectures into free-standing bulk porous Si3N4 ceramics. Firstly, α-Si3N4 microchannels were synthesized on the surface of CB-templates via carbothermal reduction nitridation (CRN). And then, homogeneous ...
High-Entropy Perovskite Reta3O9 Ceramics For High-Temperature Environmental/Thermal Barrier Coatings,
2022
Faculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
High-Entropy Perovskite Reta3O9 Ceramics For High-Temperature Environmental/Thermal Barrier Coatings, Lin Chen, Baihui Li, Jun Guo, Yuke Zhu, Jing Feng
Journal of Advanced Ceramics
Four high-entropy perovskite (HEP) RETa3O9 samples were fabricated via a spark plasma sintering (SPS) method, and the corresponding thermophysical properties and underlying mechanisms were investigated for environmental/thermal barrier coating (E/TBC) applications. The prepared samples maintained low thermal conductivity (1.50 W·m-1·K-1), high hardness (10 GPa), and an appropriate Young’s modulus (180 GPa), while the fracture toughness increased to 2.5 MPa·m1/2. Nanoindentation results showed the HEP ceramics had excellent mechanical properties and good component homogeneity. We analysed the influence of different parameters (the disorder parameters of the ...
Preparation And Properties Of T-ZnoW Enhanced Bcp Scaffolds With Double-Layer Structure By Digital Light Processing,
2022
State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;Engineering Research Center of Ceramic Materials for Additive Manufacturing, Ministry of Education, Wuhan 430074, China
Preparation And Properties Of T-ZnoW Enhanced Bcp Scaffolds With Double-Layer Structure By Digital Light Processing, Ming-Zhu Pan, Shuai-Bin Hua, Jia-Min Wu, Xi Yuan, Ze-Lin Deng, Jun Xiao, Yu-Sheng Shi
Journal of Advanced Ceramics
Bone scaffolds require both good bioactivity and mechanical properties to keep shape and promote bone repair. In this work, T-ZnOw enhanced biphasic calcium phosphate (BCP) scaffolds with triply periodic minimal surface (TPMS)-based double-layer porous structure were fabricated by digital light processing (DLP) with high precision. Property of suspension was first discussed to obtain better printing quality. After sintering, T-ZnOw reacts with β-tricalcium phosphate (β-TCP) to form Ca19Zn2(PO4)14, and inhibits the phase transition to α-TCP. With the content of T-ZnOw increasing from 0 to 2 wt%, the flexural strength increases from ...
High Transmittance And Grain-Orientated Alumina Ceramics Fabricated By Adding Fine Template Particles,
2022
University of Chinese Academy of Sciences, Beijing 100049, China;State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
High Transmittance And Grain-Orientated Alumina Ceramics Fabricated By Adding Fine Template Particles, Han Chen, Jin Zhao, Shunzo Shimai, Xiaojian Mao, Jian Zhang, Guohong Zhou, Shiwei Wang, Na Gu, Kai Zheng
Journal of Advanced Ceramics
Transparent Al2O3 ceramics with grains aligned to the c-axis were prepared by adding platelets with a low aspect ratio into fine equiaxed particles. The mixed powders were formed into green bodies using spontaneous coagulation casting and sintered by pressureless sintering and hot-isostatic pressure sintering. Zeta potentials and rheological behavior of the slurries, relative densities of green bodies, and orientation and optical properties of sintered bodies were investigated and discussed. The platelet with a high aspect ratio suppressed densification more seriously during sintering than the one with a low aspect ratio. An excellent oriented structure was obtained when ...
Microwave Synthesis Of Duplex Α/Β-Sialon Ceramic Cutting Inserts: Modifying M, N, Z Values, Synthesis Temperature, And Excess Y2O3 Synthesis Additive,
2022
School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China;Collaborative Innovation Center of High-End Equipment Manufacturing Technology, Nanjing University of Science and Technology, Ministry of Industry and Information Technology, Nanjing 210094, China
Microwave Synthesis Of Duplex Α/Β-Sialon Ceramic Cutting Inserts: Modifying M, N, Z Values, Synthesis Temperature, And Excess Y2O3 Synthesis Additive, Dongbo Hong, Zengbin Yin, Fuzhou Guo, Juntang Yuan
Journal of Advanced Ceramics
Duplex α/β-SiAlON ceramic cutting inserts (30α:70β) were synthesized by microwave sintering. The effects of solid solution parameters (m, n, z), synthesis temperature, and amount of excess Y2O3 synthesis additive on phase assemblage, microstructure, mechanical properties, and cutting performance were systematically investigated. It was found that increasing m value could improve the formation of α phase while high z value over 1.0 resulted in the dissolution of α phase into β phase and intergranular phase. Increasing the amount of excess Y2O3 could promote densification and elongated β grain growth; however, the excess ...
Gas-Discharge Induced Flash Sintering Of Ysz Ceramics At Room Temperature,
2022
Engineering Laboratory of Power Equipment Reliability in Complicated Coastal Environments, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
Gas-Discharge Induced Flash Sintering Of Ysz Ceramics At Room Temperature, Yuchen Zhu, Hongyang Zhou, Rongxia Huang, Nianping Yan, Xilin Wang, Guanghua Liu, Zhidong Jia
Journal of Advanced Ceramics
This is the first study to conduct the flash sintering of 3 mol% yttria-stabilized zirconia (3YSZ) ceramics at room temperature (25) under a strong electric field, larger than 1 kV/cm. At the standard atmospheric pressure (101 kPa), the probability of successful sintering is approximately half of that at low atmospheric pressure, lower than 80 kPa. The success of the proposed flash sintering process was determined based on the high electric arc performance at different atmospheric pressures ranging from 20 to 100 kPa. The 3YSZ samples achieved a maximum relative density of 99.5% with a grain size of ~200 ...
High-Entropy (La0.2Nd0.2Sm0.2Eu0.2Gd0.2)2Ce2O7: A Potential Thermal Barrier Material With Improved Thermo-Physical Properties,
2022
Key Laboratory of Science and Technology on Wear and Protection of Materials, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China;Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
High-Entropy (La0.2Nd0.2Sm0.2Eu0.2Gd0.2)2Ce2O7: A Potential Thermal Barrier Material With Improved Thermo-Physical Properties, Yun Xue, Xiaoqin Zhao, Yulong An, Yijing Wang, Meizhen Gao, Huidi Zhou, Jianmin Chen
Journal of Advanced Ceramics
High-entropy oxides (HEOs) are widely researched as potential materials for thermal barrier coatings (TBCs). However, the relatively low thermal expansion coefficient (TEC) of those materials severely restricts their practical application. In order to improve the poor thermal expansion property and further reduce the thermal conductivity, high-entropy (La0.2Nd0.2Sm0.2Eu0.2Gd0.2)2Ce2O7 is designed and synthesized in this work. The as-prepared multicomponent material is formed in a simple disordered fluorite structure due to the high-entropy stabilization effect. Notably, it exhibits a much higher TEC of approximately ...
Structure, Defects, And Microwave Dielectric Properties Of Al-Doped And Al/Nd Co-Doped Ba4Nd9.33Ti18O54 Ceramics,
2022
State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
Structure, Defects, And Microwave Dielectric Properties Of Al-Doped And Al/Nd Co-Doped Ba4Nd9.33Ti18O54 Ceramics, Weijia Guo, Zhiyu Ma, Yu Luo, Yugu Chen, Zhenxing Yue, Longtu Li
Journal of Advanced Ceramics
Low-loss tungsten-bronze microwave dielectric ceramics are dielectric materials with potential application value for miniaturized dielectric filters and antennas in the fifth-generation (5G) communication technology. In this work, a novel Al/Nd co-doping method of Ba4Nd9.33Ti18O54 (BNT) ceramics with a chemical formula of Ba4Nd9.33+z/3Ti18-zAlzO54 (BNT-AN, 0 ≤ z ≤ 2) was proposed to improve the dielectric properties through structural and defect modulation. Together with Al-doped ceramics (Ba4Nd9.33Ti18-zAl4z/3O54, BNT-A, 0 ≤ z ≤ 2) for ...
21-Component Compositionally Complex Ceramics: Discovery Of Ultrahigh-Entropy Weberite And Fergusonite Phases And A Pyrochlore-Weberite Transition,
2022
Department of Nano Engineering, University of California San Diego, La Jolla 92093, USA
21-Component Compositionally Complex Ceramics: Discovery Of Ultrahigh-Entropy Weberite And Fergusonite Phases And A Pyrochlore-Weberite Transition, Mingde Qin, Heidy Vega, Dawei Zhang, Sarath Adapa, Andrew J. Wright, Renkun Chen, Jian Luo
Journal of Advanced Ceramics
Two new high-entropy ceramics (HECs) in the weberite and fergusonite structures, along with the unexpected formation of ordered pyrochlore phases with ultrahigh-entropy compositions and an abrupt pyrochlore-weberite transition, are discovered in a 21-component oxide system. While the Gibbs phase rule allows 21 equilibrium phases, 9 out of the 13 compositions examined possess single HEC phases (with ultrahigh ideal configurational entropies: ~2.7kB per cation or higher on one sublattice in most cases). Notably, (15RE1/15)(Nb1/2Ta1/2)O4 possess a single monoclinic fergusonite (C2/c) phase, and (15RE1/15)3(Nb1 ...
Low Concentration Isopropanol Gas Sensing Properties Of Ag Nanoparticles Decorated In 2O3 Hollow Spheres,
2022
College of Mechanical Engineering, Yangzhou University, Yangzhou 225127, China
Low Concentration Isopropanol Gas Sensing Properties Of Ag Nanoparticles Decorated In 2O3 Hollow Spheres, Chao Zhang, Yunchun Huan, Ying Li, Yifan Luo, Marc Debliquy
Journal of Advanced Ceramics
In order to detect low concentrations of volatile organic compounds (VOCs) for the early diagnosis of lung cancer, sensors based on hollow spheres of In2O3 were prepared through the soft template method. Ag nanoparticle decorated In2O3 composites were synthesized via dipping and annealing. The microstructure, phase composition, element distribution, and state of Ag were analyzed by the scanning electron microscopy (SEM), X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), and X-ray photoelectron spectroscopy (XPS). The gas sensing tests showed that Ag-In2O3 sensors had the highest response to isopropanol at 300 . The ...
Crystal Structure And Enhanced Microwave Dielectric Properties Of The Ce2[Zr1-X(Al1/2Ta1/2)X]3(Moo4)9 Ceramics At Microwave Frequency,
2022
Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, University of Jinan, Jinan 250022, China
Crystal Structure And Enhanced Microwave Dielectric Properties Of The Ce2[Zr1-X(Al1/2Ta1/2)X]3(Moo4)9 Ceramics At Microwave Frequency, Chao Feng, Xu Zhou, Bingjing Tao, Haitao Wu, Shifeng Huang
Journal of Advanced Ceramics
Dense microwave dielectric ceramics of Ce2[Zr1-x(Al1/2Ta1/2)x]3(MoO4)9 (CZMAT) (x = 0.02-0.10) were prepared by the conventional solid-state route. The effects of (Al1/2Ta1/2)4+ on their microstructures, sintering behaviors, and microwave dielectric properties were systematically investigated. On the basis of the X-ray diffraction (XRD) results, all the samples were matched well with Pr2Zr3(MoO4)9 structures, which belonged to the space group R3¯c. The lattice parameters were obtained using the Rietveld refinement method. The correlations between the ...
Continuous Sic Skeleton Reinforced Highly Oriented Graphite Flake Composites With High Strength And Specific Thermal Conductivity,
2022
State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, China
Continuous Sic Skeleton Reinforced Highly Oriented Graphite Flake Composites With High Strength And Specific Thermal Conductivity, Xiaoyu Zhang, Wenqi Xie, Lan Sun, Zhilei Wei, Zhejian Zhang, Yuanyuan Zhu, Jiabin Hu, Shenghe Wang, Zhongqi Shi
Journal of Advanced Ceramics
Highly oriented graphite-based composites have attracted great attention because of their high thermal conductivity (TC), but the low mechanical properties caused by the inhomogeneous distribution and discontinuity of reinforcements restrict the wide applications. Herein, continuous SiC ceramic skeleton reinforced highly oriented graphite flake (SiC/GF) composites were successfully prepared by combining vacuum filtration and spark plasma sintering. The effect of SiC concentration on the microstructure, flexural strength, and thermophysical properties of the composites was investigated. The GF grains in the composites exhibited high orientation with a Lotgering factor of > 88% when the SiC concentration was ≤ 30 wt%, and the SiC ...
Synthesis And Properties Of Moalb Composites Reinforced With Sic Particles,
2022
Center of Materials Science and Engineering, School of Mechanical and Electronic Control Engineering, Beijing Jiaotong University, Beijing 100044, China
Synthesis And Properties Of Moalb Composites Reinforced With Sic Particles, Weiwei Zhang, Shibo Li, Shuang Wu, Boxiang Yao, Shukai Fan, Guoping Bei, Wenbo Yu, Yang Zhou, Ying Wu, Sun-An Ding
Journal of Advanced Ceramics
Novel MoAlB composites reinforced with 5-15 vol% SiC have been firstly prepared and characterized in the present study. The SiC reinforcement is stable with MoAlB at a sintering temperature of 1200 in Ar. The 5 vol% SiC/MoAlB composite exhibited improved mechanical properties and enhanced oxidation resistance. A flexural strength of 380 MPa and a Vickers hardness of 12.7 GPa were achieved and increased by 24% and 51%, respectively, as compared with those for MoAlB, indicating the enhanced strengthening effect of SiC. Cyclic oxidation tests at 1200 and 1300 for 10 h in air showed that the 5 vol ...
Remarkably Enhanced Piezo-Photocatalytic Performance In Batio3/Cuo Heterostructures For Organic Pollutant Degradation,
2022
Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing, Beijing 100083, China; Institute for Advanced Material and Technology, University of Science and Technology Beijing, Beijing 100083, China
Remarkably Enhanced Piezo-Photocatalytic Performance In Batio3/Cuo Heterostructures For Organic Pollutant Degradation, Chengye Yu, Mengxi Tan, Chengdong Tao, Yuxuan Hou, Chuanbao Liu, Huimin Meng, Yanjing Su, Lijie Qiao, Yang Bai
Journal of Advanced Ceramics
Introducing polarization field of piezoelectric materials is an effective strategy to improve photocatalytic performance. In this study, a new type of BaTiO3/CuO heterostructure catalyst was designed and synthesized to achieve high piezo-photocatalytic activity through the synergy of heterojunction and piezoelectric effect. The BaTiO3/CuO heterostructure shows a significantly enhanced piezo-photocatalytic degradation efficiency of organic pollutants compared with the individual BaTiO3 nanowires (NWs) and CuO nanoparticles (NPs). Under the co-excitation of ultrasonic vibration and ultraviolet radiation, the optimal degradation reaction rate constant k of polarized BaTiO3/CuO heterostructure on methyl orange (MO) dye can reach 0 ...
Dual-Surfactant Templated Hydrothermal Synthesis Of Cose2 Hierarchical Microclews For Dielectric Microwave Absorption,
2022
Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China
Dual-Surfactant Templated Hydrothermal Synthesis Of Cose2 Hierarchical Microclews For Dielectric Microwave Absorption, Qi Cao, Jie Zhang, Huibin Zhang, Junzhou Xu, Renchao Che
Journal of Advanced Ceramics
Cobalt diselenide (CoSe2) hierarchical clew-like structure is synthesized via a dual-surfactant templated hydrothermal process, and for the first time, its microwave absorption capability has been established. Specifically, the as-synthesized hierarchical interconnected structure is assembled by numerous dense nanobelts. Meticulous tuning of the synthetic conditions which could influence the hierarchical architecture indicates that, in this system, cetyltrimethylammonium bromide (CTAB) plays a dominate role of "balling" while protonated diethylenetriamine (DETA) plays the role of "stringing" . As a novel absorbent, the microwave absorption performance of CoSe2 microstructure is evaluated in 2-18 GHz band. Particularly, 3D hierarchical CoSe2 microclews exhibit superior ...
Electrospun Cu-Doped In 2O3 Hollow Nanofibers With Enhanced H2S Gas Sensing Performance,
2022
School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China
Electrospun Cu-Doped In 2O3 Hollow Nanofibers With Enhanced H2S Gas Sensing Performance, Yu Zhang, Shuai Han, Mingyuan Wang, Siwei Liu, Guiwu Liu, Xianfeng Meng, Ziwei Xu, Mingsong Wang, Guanjun Qiao
Journal of Advanced Ceramics
One-dimensional nanofibers can be transformed into hollow structures with larger specific surface area, which contributes to the enhancement of gas adsorption. We firstly fabricated Cu-doped In2O3 (Cu-In2O3) hollow nanofibers by electrospinning and calcination for detecting H2S. The experimental results show that the Cu doping concentration besides the operating temperature, gas concentration, and relative humidity can greatly affect the H2S sensing performance of the In2O3-based sensors. In particular, the responses of 6%Cu-In2O3 hollow nanofibers are 350.7 and 4201.5 to 50 and ...
Evaluation Of Stability And Functionality Of Bace1-XInXO3-Δ Electrolyte In A Wider Range Of Indium Concentration,
2022
Center of Excellence for Green Technologies, Institute for Multidisciplinary Research, University of Belgrade, Kneza Višeslava 1, 11030 Belgrade, Serbia
Evaluation Of Stability And Functionality Of Bace1-XInXO3-Δ Electrolyte In A Wider Range Of Indium Concentration, Aleksandar Malešević, Aleksandar Radojković, Milan Žunić, Aleksandra Dapčević, Sanja Perać, Zorica Branković, Goran Branković
Journal of Advanced Ceramics
The properties of BaCe1-xInxO3-δ (x = 0.05, 0.10, 0.15, 0.20, 0.25, 0.30, 0.35, and 0.40) as proton conducting electrolyte are examined. The dense electrolyte is formed after sintering at 1300 for 5 h in air. The samples with In content ≥ 25 mol% contain In2O3 as a secondary phase. The highest total conductivity is around 5×10-3 S/cm for BaCe0.75In0.25O3-δ in the wet hydrogen atmosphere at 700 . After exposure to pure CO2 atmosphere at 700 for ...
