JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2022
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IF 6.364
Linjing Liu,Bin Yang,Shuai Yang,Qiangwei Kou,Hang Xie,Yuan Sun,Yunfei Chang,Shan-Tao Zhang,Fei Li
Grain-oriented Pb(Mg 1/3 Nb 2/3 )O 3 -PbZrO 3 -PbTiO 3 (PMN-PZ-PT) based ceramics were synthesized through templated grain growth via using BaTiO 3 (BT) templates. Although BT templates are partially destroyed by PMN-PZ-PT matrix, CuO addition remarkably promotes [001] c -oriented grain growth behavior of the ceramics, resulting in an improvement of Lotgering factor F 001 from ~86% to 98%. Both crystallographic texture and CuO doping increase tetragonality and reduce average domain size of the ceramics dominated by rhombohedral phase. Consequently, 0.50 wt% CuO-doped ceramics ( F 001 ~98%) exhibit optimum electromechanical properties: d 33 ~860 pC/N, d 33 × g 33 ~48.6 × 10 −12 m 2 /N, k p ~0.80, E c ~7.2 kV/cm, tan δ ~0.8% and T c ~222 °C. In addition to ~3.7 times and 6.6 times higher d 33 and d 33 × g 33 , those ceramics possess about 240% enhanced piezoelectric strain and much better thermal stability ( S max / E max variation ≤2% between RT and 150 °C) relative to non-textured counterpart. This work offers a good paradigm for simultaneously exploring high piezoelectric response and good temperature stability in piezoceramics, benefiting the development of next-generation advanced electromechanical devices.
研究领域:
材料科学
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电子工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
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2020
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IF 3.83
Aditya Jain,Y.G. Wang,N. Wang,F.L. Wang
CuO doped Ba 0.8 Sr 0.1 Ca 0.1 Ti 0.95 Zr 0.05 O 3 (BSCTZ) ceramics were prepared by a modified mechano-chemical activation technique with the aim of improving energy storage properties for ceramic capacitor applications. CuO can effectively improve the microstructural characteristics along with a transformation of BSCTZ from classical ferroelectric to relaxor, which is the prime requirement for obtaining high discharge energy density and energy efficiency. The effect of CuO doping on the microstructural, ferroelectric, dielectric, and piezoelectric properties have been systematically studied. The study reveals that an appropriate amount of CuO doping can significantly enhance the morphological properties along with improvement in material density, which is very beneficial in a material for attaining improved energy storage performance. The BSCTZ sample with 3 mol% CuO doping has shown a highly dense microstructure, high saturation polarization (33.01 μC/cm 2 ), low remnant polarization (6.74 μC/cm 2 ), ultrahigh discharge energy density (1.81 J/cm 3 ) and high energy efficiency (81.9%). The CuO doping in BSCTZ has also led to a slight improvement in breakdown strength and electromechanical properties compared to pure BSCTZ ceramics, which is mainly attributed to excellent density and optimum grain size of the material.
研究领域:
材料科学
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电子工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
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2022
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IF 3.656
Ya-Zhe Xing,Yin-Ni Men,Xiao Feng,Ji-Hua Geng,Zhi-Rui Zou,Fu-Hua Chen
The effect of CuO addition on the microstructure and ionic conductivity of 8 mol% yttria-stabilized zirconia (8YSZ) were investigated. Undoped and 1 mol%, 1.5 mol%, 2 mol%, 2.5 mol% and 3 mol% CuO-doped 8YSZ bulks were prepared by sol-gel synthesis, cold pressing forming, and high-temperature sintering. The microstructure, phase composition , and ionic conductivity of the samples were characterized in detail to determine whether it could be used as alternative electrolyte material for the intermediate and low temperature solid oxide fuel cells. The results reveal that all samples present cubic zirconia. With increasing the CuO-doping content, the lattice parameter of the samples decreases, while the relative density of the samples increases from 66 to 85%, and the mean grain size increases from 0.90 to 2.63 μm. Furthermore, it is found that 2 mol% CuO doped 8YSZ possesses the minimum activation energy of 0.945 eV and the maximum AC ionic conductivity of 5.75 × 10 −2 S·cm −1 measured at 750 °C. The change in the ionic conductivity with the CuO-doping content is closely related to microstructural evolution and defect association in the materials.
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
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2021
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IF 3.927
Yihang Dong,Xiangnan Wang,Ye Han,Shuyu Yao
{(ZrO 2 ) 0.92 (Y 2 O 3 ) 0.08 } 1- x (CuO) x (ZYC) synthesized by the co-precipitation method with different stoichiometry ( x =0, 0.1, 0.2 and 0.3) are evaluated through thermogravimetric-differential scanning calorimetry (TG-DSC), X-ray diffraction (XRD) and electrical conductivity using an electrochemical workstation and the effects of CuO doping content on the above properties are researched, respectively. The results are discussed in terms of the potential as diffusion barrier material to be applied in diffusion barrier limiting current oxygen sensors application at temperatures from 500 to 850 °C. Results derived from TG-DSC shows that the weight loss of the sample is mainly due to the decomposition of the precursor, forming ZYC above ~600 °C. XRD analysis shows that the ZYC sample is a cubic phase and the CuO doping is benefit to the crystallinity of ZYC. The electrical conductivity results indicate that the total conductivity decreases for ZYC1 but then increases with the increase of CuO doping content and reaches the maximum total conductivity of 2.02 × 10 −1 S cm −1 at 850 °C and the activation energy ( E a ) is 0.93 eV for ZYC3.
研究领域:
材料科学
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化学
✓ 已验证
DOI
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
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2021
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IF 4.051
Jianli Ma,Qing Cheng,Zhifen Fu,Zhongyi Yang
Magnesium Niobate (Mg 4 Nb 2 O 9 ) nanopowders were prepared as a precursor by the High Energy Ball Milling method to improve sintering stability of ceramics. CuO was used as addition to improve the sintering stability and microwave dielectric property of Mg 4 Nb 2 O 9 ceramics. X-ray diffraction and Raman analyses demonstrated that the solid solution between Mg 4 Nb 2 O 9 and CuO were formed because of their similar ionic sizes. The sintering ability and temperature stability of Mg 4 Nb 2 O 9 ceramics can be effectively improved by doping of CuO. At CuO content x = 3, Mg 4 Nb 2 O 9 ceramics exhibited an appropriate microwave dielectric properties with ɛ r = 13.2, Q × f = 27 800 GHz, τ f = 4.2 ppm/ °C at 1150 °C.
研究领域:
材料科学
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物理学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
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IF 13.3
Junkai Hao,Hanning Song,Shuo Sun,Jing Feng,Hongben Zhang,Xuewan Zhang,Xuejiao Ren,Zhengquan Yan,Lei Hu
To improve the sensitivity and selectivity for S 2− and Fe 2+ detection in complex agricultural products, ultra-small nano CeO 2 /CuO doped carboxylated chitosan fibers (CeO 2 /CuO CCF) was constructed under microwave-assisted conditions. Not only did CeO 2 /CuO CCF possess suitable BET specific surface area, superior stability and synergistic-enhancement oxidase-like activity, trace S 2− or Fe 2+ could selectively change its oxidase-like activity accompanying with visible color changes. Under the optimized conditions, there express specific double ratiometric colorimetric linear relationships between lg( A 729 / A 343 )/lg( A 415/ A 343 ) and c S 2− or c Fe 2+ with large linear ranges. When applied for visual monitoring of S 2− and Fe 2+ in real agricultural products, the detection limits were low to 3.5 × 10 −9 mol·L −1 and 9.4 × 10 −8 mol·L −1 respectively, far below the permitted values in drinking water by World Health Organization. The mechanisms for synergistic-enhancement oxidase-like activity for CeO 2 /CuO CCF to selectively recognize S 2− and Fe 2+ were proposed. This work will provide an efficient way for visual monitoring of multiple analytes in complex agricultural products.
研究领域:
材料科学
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环境科学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）