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Modified room temperature solid-state synthesis of yttria-stabilized zirconia(YSZ) nano-powders for solid oxide fuel cells

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Journal of rare Earths 2023年第9期41卷 1385-1391,I0004页

作者： Xiaoqian Xu Yurun Feng Zhaoyu Zhong Xue Guo Zhenhao Zhang Jiao Li Shikai Zhao Shigang Wu Haibin Sun School of Materials Science and Engineering Shandong University of TechnologyZibo 255000China shandong Yasai Ceramic Technology Co. Ltd.Jinan 271100China shandong industrial ceramics research&design institute Co. Ltd.Zibo 255000China

High-performance solid oxide fuel cell(SOFC) is in urgent need of high-quality electrolyte powders with high reactivity and chemical ***,8 mol% Y_(2)O_(3) doped ZrO_(2)(YSZ) nano-powders were synthesized by an improved solid-state reaction method at ambient temperature,and were applied to the fabrication of SOFC *** nano-powders show average grain sizes of ^(2)0 nm and high dispersibility,which is comparable with or even better than some other chemical *** from their high reactivity,dense YSZ electrolytes(relative density of 97.9%) can be obtained at a relatively low sintering temperature of 1400℃.The optimized electrical conductivity reaches up to a high value of0.034 S/cm at 800 0C in *** anode supported single cell with the construction of Ni-YSZ/YSZ/Sm_(0.2)Ce_(0.8)O_(2-δ)(SdC)/La_(0.6)Sr_(0.4)Co_(0.2)Fe_(0.8)O_(3-δ)(LSCF) exhibits the peak power density of 0.827 W/cm^(2) at800℃ while taking wet H_(2) as fuels and ambient air as oxidants.

关键词： room temperature solid-state reaction YSZ electrolyte High sintering activity High ionic conductivity rare earths

Boosting Capacitive deionization Performance of Commercial Carbon Fibers Cloth via Structural regulation Based on Catalytic-Etching Effect

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Energy & Environmental Materials 2023年第1期6卷 242-252页

作者： Chunjie Zhang dong Wang Zhen Wang Guangshuai Zhang Zhichao Liu Jie Wu Jin Hu Guangwu Wen School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China School of Materials Science and Engineering Shandong University of TechnologyZibo 255000China shandong industrial ceramics research&design institute Co. Ltd.Zibo 255000China

Monolithic carbon electrodes with robust mechanical integrity and porous architecture are highly desired for capacitive deionization but remain *** to the excellent mechanical strength and electroconductivity,commercial carbon fibers cloth demonstrates great potential as high-performance electrodes for ions *** this,its direct application on capacitive deionization is rarely reported in terms of limited pore structure and natural ***,a powerful metal-organic framework-engaged structural regulation strategy is developed to boost the desalination properties of carbon *** obtained porous carbon fibers features hierarchical porous structure and hydrophilic surface providing abundant ions-accessible sites,and continuous graphitized carbon core ensuring rapid electrons *** catalytic-etching mechanism involving oxidation of Co and subsequent carbonthermal reduction is proposed and highly relies on annealing temperature and holding *** directly evaluated as a current collector-free capacitive deionization electrode,the porous carbon fibers demonstrates much superior desalination capability than pristine carbon fibers,and remarkable cyclic stability up to 20 h with negligible ***,the PCF-1000 showcases the highest areal salt adsorption capacity of 0.037 mg cm^(−2) among carbon ***,monolithic porous carbon fibers-carbon nanotubes with increased active sites and good structural integrity by in-situ growth of carbon nanotubes are further fabricated to enhance the desalination performance(0.051 mg cm^(−2)).This work demonstrates the great potential of carbon fibers in constructing high-efficient and robust monolithic electrode for capacitive deionization.

关键词： capacitive deionization carbon fibers cloth catalytic-etching monolithic electrodes

Microstructure and dielectric Property of 3d BNf/Si3N4 Fabricated by CVI Process

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Journal of Wuhan University of Technology(Materials Science) 2019年第4期34卷 818-823页

作者： LI Jianping CHENG Laifei Science and Technology on Thermostructural Composite Materials Laboratory Northwestern Poly technical University Xi'an 710072China shandong research & design institute of industrial ceramics Zibo 255031China

As potential wave-transparent materials applied at high temperatures, 3d BNf/Si3N4 ceramic matrix composites were prepared by low pressure chemical vapor infiltration or deposition（LPCVI/CVd） process from SiCl4-NH3-H2-Ar gas precursor at 800 oC. The densification process, microstructure and dielectric properties of 3d BNf/Si3N4 composites were investigated. The results indicated that 3d BNf/Si3N4 was successfully fabricated by LPCVI/CVd, with final open porosity of 2.37% and density of 1.89 g/cm3. densification kinetics of 3d BNf/Si3N4 is a typical exponential pattern. The Si3N4 matrix was uniformly infiltrated into porous BNf preform. The deposited Si3N4 matrix was amorphous by Xrd analysis. Introduction of BN fiber into Si3N4 ceramic lowered the permittivity of Si3N4. The fabricated BNf/Si3N4 composites possess low permittivity of 3.68 and low dielectric loss of lower than 0.01, which are independent of temperature below400 oC. Transmission coefficient of BNf/Si3N4 composite is 0.57 and keeps stable below 400 oC. BNf/Si3N4 can be fabricated at low temperature and may be candidates for the microwave transparent materials.

关键词： BNf/Si3N4 LPCVI dielectric property high temperature stability

Pomegranate micro/nano hierarchical plasma structure for superior microwave absorption

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Nano research 2022年第10期15卷 8688-8696页

作者： Chunyan ding Tao Wu Xinsen Hu Chengshuai Shao Zhipeng Xu Hui Fu Songsong Wu Guangwu Wen Xiaoxiao Huang School of Materials Science and Engineering Shandong University of TechnologyZibo 255000China School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China shandong industrial ceramics research&design institute Co. Ltd.Zibo 255000China shandong institute of Advanced Ceramic Co. Ltd.Zibo 255000China

Inspired by the pomegranate natural artful structure,pomegranate micro/nano hierarchical plasma configuration of Fe/Fe3C@graphitized carbon(FFC/pCL)was constructed based on the green sol-gel method and in-situ chemical vapor deposition(CVd)synthesis ***-like FFC/pCL successfully overcame the agglomeration phenomenon of magnetic nanoparticles with each seed of the pomegranate consisting of Fe/Fe_(3)C as cores and graphitized carbon layers as *** high-density arrangement of magnetic nanoparticles and the design of pomegranate-like heterostructures lead to enhanced plasmon ***,the pomegranate-like FFC/pCL achieved a great electromagnetic wave(EMW)absorbing performance of 6.12 GHz wide band absorption at a low mass adding of only 16.7 wt.%.Such excellent EMW performance can be attributed to its unique pomegranate hierarchical plasma configuration with separated nanoscale iron cores,surface porous texture,and good carbon conductive *** investigation provides a new paradigm for the development of magnetic/carbon based EMW absorbing materials by taking advantage of pomegranate hierarchical plasma configuration.

关键词： electromagnetic wave absorption low filler loading carbon shell network structure magnetic Fe/Fe3C

The electronic structures, Born effective charge tensors,and phonon properties of cubic, tetragonal,orthorhombic, and rhombohedral K_(0.5)Na_(0.5)NbO_3: A first-principles comparative study

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Chinese Physics B 2014年第12期23卷 390-397页

作者：周树兰赵显江向平韩晓东 department of Material Science and Engineering Jingdezhen Ceramics Institute State Key Laboratory of Crystal Material Institute of Crystal Material Shandong University

The electronic structures, Born effective charges（BECs）, and full phonon dispersions of cubic, tetragonal, orthorhombic, and rhombohedral K0.5Na0.5Nb O3 are investigated by the first principles method based on density functional *** hybridized states of Nb 4d and O 2p states are observed in the valence band, showing the formation of a strong Nb–O covalent bond which should be responsible for the displacement of Nb and O atoms. The abnormally large BECs of Nb and O indicate the possibility of phase instability induced by the off-center displacement of Nb and O atoms. The phonon dispersions reveal that the ferroelectric instability of K0.5Na0.5Nb O3 is dominated by Nb and O displacements with significant Na characteristics. In addition to the ferroelectric instability, there is also rotational instability coming from the oxygen octahedra rotation around one axis. Moreover, the Γ phonon properties of orthorhombic KNb O3, Na Nb O3, and K0.5Na0.5Nb O3 are also studied in detail.

关键词： Born effective charge phonon dispersion density functional theory(dFT) phase instability of K0.5Na0.5NbO3

rapid Prototyping of Ceramic Components by Slurry Jet Printing Ⅰ.Characterization of Working Conditions for SPI-fm3

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Rapid Prototyping of Ceramic Components by Slurry Jet Printi...

rapid Prototyping of Ceramic Components by Slurry Jet Printing Ⅱ.Jet Printing of Ceramic Slurry

第十一届全国高技术陶瓷学术年会

作者： Shuhai Wang J.H.Jang W.A.Schulze S.M.Pigrim shandong r & d institute of industrial ceramics NYS College of ceramics Alfred University

The working condition of the Sanders Four Material Model Maker(SPI-fm)were tested and paraffin wax barium titanate ceramic slurry for Slurry Jet Printing(SJP) with the SPI-fm3 were made and tested with respect of its rheological *** approaches were under *** the wax vehicle system consolidate while cooling low viscosity was achieved with coupling agent but the solid loading were too low to be able to sinter to full *** volatile vehicle seems the only ideal solution for the SJP process.

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Rapid Prototyping of Ceramic Components by Slurry Jet Printi...

Effect of the L-d_(1)alleles on leaf morphology,canopy structure and photosynthetic productivity in upland cotton(Gossypium hirsutum L.)

第十一届全国高技术陶瓷学术年会

作者： Shuhai Wang J.H.Jang W.A.Schulze S.M.Pilgrim shandong r & d institute of industrial ceramics NYS College of ceramics Alfred University

Characterization of the Sanders ProtoBuild Material The PortoBuild material for the SPI-fm were characterized for their theological *** viscosities of material were measured at different shear rates and different ***.3 shows the rheological properties of the ProtoBuild material at various *** that there is no significant difference in viscosity values at different temperatures for both materials respectively.

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Journal of Integrative Agriculture 2023年第1期22卷 108-119页

作者： JIANG Hui GAO Ming-wei CHEN Ying ZHANG Chao WANG Jia-bao CHAI Qi-chao WANG Yong-cui ZHENG Jin-xiu WANG Xiu-li ZHAO Jun-sheng institute of industrial Crops Shandong Academy of Agricultural SciencesJinan 250100P.R.China College of Life Sciences Shandong Normal UniversityJinan 250014P.R.China

One of the most important objectives for breeders is to develop high-yield *** increase in crop yield has met with bottlenecks after the first green revolution,and more recent efforts have been focusing on achieving high photosynthetic efficiency traits in order to enhance the *** shape is a significant agronomic trait of upland cotton that affects plant and canopy architecture,yield,and other production *** major leaf shape types,including normal,sub-okra,okra,and super-okra,with varying levels of lobe severity,are controlled by a multiple allelic series of the d-genome locus L-d_(1).To analyze the effects of L-d_(1)alleles on leaf morphology,photosynthetic related traits and yield of cotton,two sets of near isogenic lines(NILs)with different alleles were constructed in Lumianyan 22(LMY22)and Lumianyan 28(LMY28)*** analysis of morphological parameters and the results of virus-induced gene silencing(VIGS)showed that the regulation of leaf shape by L-d_(1)alleles was similar to a gene-dosage *** with the normal leaf,deeper lobes of the sub-okra leaf improved plant canopy structure by decreasing the leaf area index(LAI)and increasing the light transmittance rate(LTr),and the mid-range LAI of sub-okra leaf also guaranteed the accumulation of cotton *** the chlorophyll content(SPAd)of sub-okra leaf was lower than those of the other two leaf shapes,the net photosynthetic rate(Pn)of sub-okra leaf was higher than those of okra leaf and normal leaf at most ***,the improvements in canopy structure,as well as photosynthetic and physiological characteristics,contributed to optimizing the light environment,thereby increasing the total biomass and yield in the lines with a sub-okra leaf *** results suggest that the sub-okra leaf may have practical application in cultivating varieties,and could enhance sustainable and profitable cotton production.

关键词： photosynthesis canopy structure yield biomass sub-okra leaf shape

dynamic oxidation mechanism of carbon fiber reinforced SiC matrix composite in high-enthalpy and high-speed plasmas

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Journal of Advanced ceramics 2022年第2期11卷 365-377页

作者： Lingwei YANG Xueren XIAO Liping LIU Jie LUO Kai JIANG Xinxing HAN Changhao ZHAO Jun ZHANG Guolin WANG Hypervelocity Aerodynamics institute China Aerodynamics Research and Development CenterMianyang 621000China Science and Technology on Thermostructural Composite Materials Laboratory Northwestern Polytechnical UniversityXi’an 710072China shandong research and design institute of industrial ceramics Co.Ltd.Zibo 255000China

This work employed an inductively coupled plasma wind tunnel to study the dynamic oxidation mechanisms of carbon fiber reinforced SiC matrix composite(C_(f)/SiC)in high-enthalpy and high-speed *** results highlighted a transition of passive/active oxidations of SiC at 800–1600℃and 1–5 ***,the active oxidation led to the corrosion of the SiC coating and interruption of the SiO_(2) *** transition borders of active/passive oxidations were thus defined with respect to oxidation temperature and partial pressure of atomic O in the high-enthalpy and high-speed *** the transition and passive domains,the SiC dissipation was *** multiple dynamic oxidations of C_(f)/SiC in the domains,the SiO_(2) thickness was not monotonously increased due to the competing mechanisms of passive oxidation of SiC and dissipation of SiO_(2).In addition,the mechanical properties of the SiC coating/matrix and the C_(f)/SiC were maintained after long-term dynamic oxidations,which suggested an excellent thermal stability of C_(f)/SiC serving in thermal protection systems(TPSs)of reusable hypersonic vehicles.

关键词： thermal protection system(TPS) ceramic matrix composite oxidation mechanism plasma wind tunnel mechanical property