CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Hongyan Chen,Zi-yang Huang,Wenjun Chen
Hydroxyapatite (HA), chitosan (CS), ZrO 2 and MgO suspensions were distributed by zonal electrophoresis (ZE), and then HA/CS/ZrO 2 /MgO composite coating on the surface of titanium substrate was fabricated by electrophoretic deposition (EPD) in a reverse electric field subsequently. An HA/ZrO 2 /MgO gradient composite coating ( Z1 ) was fabricated by calcination at 700 °C for 120 min. At the same time, another HA/ZrO 2 /MgO composite coating ( E1 ) was directly fabricated only by electrophoretic deposition for comparison, where ZrO 2 and MgO were osteogenic trace element compounds (OTECs). The morphology, structure, composition, wettability , apatite-forming ability, antibacterial efficacy of the composite coating Z1 were investigated by XRD , FT-IR, FESEM, EDS, contact angle goniometry, Lloyd's universal testing machine, electrochemical workstation, immersing in simulated body fluid, and inhibition experiments. The results showed that the contents of Ca, Zr, and Mg elements had a gradient distribution in direction of coating thickness. With the addition of ZrO 2 and MgO, the contact angle of Z1 is significantly reduced from 52.5° to 27.3°. Remarkably, Z1 has more improved properties than E1 , mainly manifested in the bonding strength of Z1 and titanium substrate up to 29.3 MPa, exceeding the standard requirements for bonding strength of HA coating implants (15 Mpa, iso13779-2) and as can be observed from cyclic voltammetry (CV) curve and Tafel polarization curve, Z1 exhibit superior electrochemical stability and strong corrosion resistance when immersed in HEPES simulated body fluid (H–SBF). In addition, after immersing in H–SBF for 24 d, the surface of the Z1 was completely covered by carbonated hydroxyapatite (CHA) and the Ca/P of the coating increased from 1.67 to 1.99. Furthermore, the antibacterial effect test of Z1 showed that the antibacterial rates of Z1 against Escherichia coli and Staphylococcus aureus reached to 98.2 % and 86.3 %, respectively.
研究领域:
材料科学
·
生物医学工程
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产品关联
DOI
高影响因子
ADVANCED ENGINEERING MATERIALS
·
2023
·Vol. 25
·期 19
·2300256
·
IF 3.6
Qian Ma,Anze Shui,Qingliang Shan,Changrong Chen,Chao He
ZrO 2 -modified aluminum titanate (Al 2 TiO 5 , AT) flexible ceramics are prepared by solid-state reaction method. The influence of sintering temperature and holding time on the microstructure and mechanical properties is investigated. Temperature-dependence behavior of the flexibility is observed. It is believed that temperature-dependence behavior of AT grain aspect ratio should take responsibility. However, average value of the aspect ratio remains unchanged regardless of holding time. Reasons are as follows: the formed zirconium titanate (ZrTiO 4 , ZT) grains could pin in AT grain boundaries, and internal stress generates between AT/ZT boundaries during grain growth process, thus inhibiting AT grain growth and reducing its growth rate, leading to AT grain refinement and increase of its aspect ratio. But, the increase of holding time reduces the inhibition effect and the increase of temperature strengthens the effect, resulting in rapid AT grain growth, especially its width. As a result, though the length and width of AT grains increase with the increase of holding time, its aspect ratio remains unchanged. On these bases, AT grain growth model related to holding time is proposed. It is expectable that the discovery of this study can deepen the research of particle pinning and provide a reference for abnormal grain growth.
研究领域:
材料科学
·
陶瓷工程
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产品关联
DOI
高影响因子
JOURNAL OF PHYSICS D-APPLIED PHYSICS
·
2023
·Vol. 56
·期 24
·244001
·
IF 3.4
Wenfeng Liu,Hongbo Liu,Lu Cheng,Shengtao Li
To improve the energy storage density while maintaining low dielectric loss is crucial for the miniaturization of capacitors. In the present study, we proposed a ternary nanocomposite system comprised of polypropylene (PP), acrylic acid grafted PP (PP-g-AA), and nano-ZrO2. The PP-g-AA was firstly prepared by a free radical grafting with the proportion fixed to 50 wt%, and the content of nano-ZrO2 ranged from 0.5 wt% to 5 wt% to tailor the ternary composite. The transmission electron microscope observation showed that PP-g-AA could significantly benefit the dispersion of nanoparticles and the differential scanning calorimetry results indicated the superior compatibility of the ternary nanocomposites. Accordingly, with the optimum nano-ZrO2 content of 0.5 wt%, the ternary nanocomposites achieved the permittivity of 2.7 and DC breakdown strength of 456.2 kV mm−1, resulting in the enhanced energy density of 2.77 J cm−3 which was 60% higher than neat PP, while the dielectric loss was kept lower than 0.003. Moreover, even at the temperature of 120 °C, the ternary nanocomposites maintained a high-performance energy storage density of 2.28 J cm−3 (with energy storage efficiency above 90%), which was 670% of the neat PP.
研究领域:
材料科学
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能源存储
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产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Suichang Ong,Huili Yang,Tu Lan,Kai Huang,Tianzheng Xie,Jinxia Zhou,Yuan Cheng,Hang Guo,Ying Zhang
Surface coating and element doping are the key strategies in LIBs development to achieve a high and stable battery performance. In this paper, ZrO 2 is directly sputtered on the Al-doped LiCoO 2 (Al-LCO) composite electrodes, enabling a controllable oxide coating on the surface of the electrode. With a sputtered coating layer of ∼6 nm, the discharging capacity of the Al doped LCO coated with ZrO 2 (Al-LCO-ZrO 2 ) is 141.04 mAh g −1 at the 100th cycle within 3.0–4.7 V at 1 C, while the Al-LCO (without coating layer) is 126.66 mAh g −1 . After 100 cycles of charging-discharging at high voltage region, the capacity retention of the Al-LCO-ZrO 2 -3 (90.7%) is also higher than the Al-LCO (75.57%). It is worth noting that, in this paper, due to the Al doping and the ZrO 2 coating, we increase the operation voltage up to 4.7 V, in which the batteries can obtain a higher energy density.
研究领域:
材料科学
·
能源技术
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Ze zhu,Xiaoqing Wang,Xiaoqian Zhang,Dehua Ma,Zhenfeng Guo,Guanghui Zhang,Luyi Zhu,Benxue Liu,Xinqiang Wang
Zirconia (ZrO 2 ) aerogels have the potential to service at temperatures exceeding 1000 °C, exhibiting superior insulation performance over those of silica , alumina and carbon aerogels , etc., but the zirconium chloride based salts, such as zirconium oxychloride, with overfast phase separation rate and indelible chlorine impurities, impede the development of an economic and environmentally benign synthesis. Besides, the stabilities of ZrO 2 aerogels toward high temperature exposure need to be further improved. With these regards, in this work, zirconium hydroxyacetate was brought up for the first time to produce ZrO 2 aerogel with the aid of a tailor-made sol-gel chemistry. Polar solvents were found to be efficient in manipulating the phase separation. After depositing silica to the gel network, ZrO 2 aerogels with a maximum visible light transmittance of up to 90 %, compressive strength of 0.24 MPa (0.159 g‧cm −3 ) were successfully obtained. The thermal conductivity of the aerogel reached a recorded value of 9.67 mW‧m −1 ‧K −1 at room temperature. The resultant aerogels possess a uniform skeleton structure with pore distribution below 20 nm, and can retain their mesoporous structure at 1000 °C, keeping a specific surface area of 200 cm 2 ‧g −1 . This work presents a well-established procedure for synthesizing high-quality ZrO 2 aerogels and promotes their utilization in optics, thermal insulation , and other related fields.
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DOI
高影响因子
Catalysts
·
2021
·Vol. 11
·期 6
·710
·
IF 4.146
Linmeng Huo,Tian Wang,Keng Xuan,Lei Li,Yanfeng Pu,Chenxin Li,Congzhen Qiao,Hao Yang,Yan Bai
The adsorption and activation of both CO2and methanol are mainly affected by the distance of the Lewis acid site, Zr4+, and Lewis base, Zr4+/O2−, of the Zr-based catalysts. In this paper, Zr-incorporated SBA-15 (Zr-SBA-15) and Zr-grafted SBA-15 (Zr/SBA-15) catalysts were prepared with different Zr environments, and were analyzed with N2adsorption–desorption isotherms, X-ray diffraction, UV-vis spectra, and XPS. It was proposed that Zr-SBA-15 catalyst with Si-O-Zr-OH and Zr-O-Si-OH structure exhibited non-adjacent sites between Zr4+and Zr4+/O2−, while Zr/SBA-15 catalyst with Zr-O-Zr-OH structure showed neighboring sites between Zr4+and Zr4+/O2−. Furthermore, the Zr/SBA-15 catalyst exhibited good catalytic activity, while no DMC was detected over the Zr-SBA-15 catalyst at the same reaction conditions. For combined in situ infrared and catalytic performance, it was indicated that the methanol and CO2could be activated to form DMC, only when the Zr4+and Zr4+/O2−sites existed and were adjacent to each other in the Zr-O-Zr-OH of Zr/SBA-15 catalyst.Keywords:dimethyl carbonate;in situ FTIR spectra;ZrO2-grafted SBA-15;Zr-incorporated SBA-15;carbon dioxide
研究领域:
催化化学
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环境科学
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Yunzhu Ma,Haotian Liu,Chaozhong Wu,Wensheng Liu,Juan Wang,Shuwei Yao
The preparation of high-performance Al 2 O 3 -ZrO 2 fibers is a significant and challenging task. In this study, continuous Al 2 O 3 -ZrO 2 fibers were synthesized via the sol-gel method using aluminum powder and zirconium acetate as raw materials. It was observed that the amorphous state of Al 2 O 3 transformed into γ-Al 2 O 3 and then to α-Al 2 O 3 , while the amorphous ZrO 2 directly transformed into t-ZrO 2 . The formation temperatures of t-ZrO 2 and α-Al 2 O 3 were both approximately 1100 °C. The optimal sintering temperature during the single-step sintering process for Al 2 O 3 -ZrO 2 fibers was 1400 °C. Based on the experiment results, fully dense Al 2 O 3 -ZrO 2 fibers with fine grains were successfully synthesized via a two-step sintering process. The average sizes of Al 2 O 3 and ZrO 2 grains were 153 nm and 62 nm, respectively. The Weibull strength of the Al 2 O 3 -ZrO 2 fibers reached 2.2 GPa with a peak value of 2.6 GPa, which exhibited an increase of approximately 30% compared to that formed by the single-step sintering process. Furthermore, the nucleation, growth, and densification behaviors of Al 2 O 3 -ZrO 2 fibers during the two-step sintering process were discussed.
研究领域:
材料科学
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陶瓷学
·
纤维科学
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·Vol. 48
·期 3
·3875-3883
·
IF 4.527
Qingliang Shan,Qian Ma,Changrong Chen,Qiankun Xu,Yudong Xue,Hao Xiong,Yewei Wang,Yuqian Zhou,Anze Shui
In this study, the effect of microcrcaks strengthening on damage evolution of Al 2 TiO 5 (AT) flexible ceramics was investigated by acoustic emission (AE). Results reveal that with increasing content of ZrO 2 , the strength of AT flexible ceramics improves gradually and the strain increases at first then decreases. When the content of ZrO 2 is 12% and 8%, the strength and strain at maximum stress are increased by 154.92% and 38.27%, respectively. In addition, thanks to the “strengthening effect” of ZrTiO 4 on grain boundary microcracks, the damage development thresholds ( σ min and σ onset ), elastic modulus and fracture toughness of AT flexible ceramics modified with ZrO 2 are significantly improved. Moreover, the visible transverse cracks and matrix shedding in ATZ-0 are the most, but the cumulative AE damage events in ATZ-8 and ATZ-4 are more than ATZ-0 at late stage, for which the fracture of ZrTiO 4 glass phase and crack branching induced by ZrTiO 4 should be responsible.
研究领域:
材料科学
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陶瓷学
·
固态物理
·
力学性能
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结构表征
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断裂力学
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·Vol. 51
·期 14
·18384-18391
·
IF 5.1
Fangliang Shen,Bingheng Sun,Tao Feng,Conghui Huang,Yin Hang,Benxue Jiang,Long Zhang,Jintai Fan
This work aims to fabricate the Yb:LuScO 3 sesquioxides transparent ceramics for use in ultrafast and ultrashort laser technology. 1 at.% Yb:LuScO 3 nanopowders were fabricated using the glycine-nitrate process. ZrO(NO 3 ) 2 was selected as the precursor of ZrO 2 which functions as a sintering aid. Yb:LuScO 3 transparent ceramics with different ZrO 2 content were fabricated by vacuum sintering at 1780 °C and HIPing at 1650 °C, among which the ceramic with 7 at.% ZrO 2 showed the highest transmittance, reaching 81 % at 2000 nm. The ceramic achieved a maximum output power of 1.5 W at 1038 nm with a slope efficiency of 34.8 % and tunable wavelength range exceeding 22 nm. The results demonstrated that Yb:LuScO 3 transparent ceramics can be considered as promising materials in 1 μm solid-state laser applications.
研究领域:
材料科学
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光学工程
·
固体激光技术
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无机非金属材料
·
先进陶瓷
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 55
·期 30
·14907-14921
·
IF 3.553
Jia Shaojin,Long Jiating,Li Jiwei,Yang Shaohua,Huang Kaili,Yang Na,Liang Yuhao,Xiao Jun
As one of the components of the lithium ion batteries (LIBs), the separator plays a vital part in the safety and electrochemical performance. In this work, a ZrO 2 -ceramic-coated polyvinylidene fluoride (PVDF) nanofibrous separator for LIBs was successfully prepared by electrospinning, subsequent dopamine hydrophilic modification and biomimetic mineralization process. These preparation processes were environmentally friendly and simple. The ZrO 2 -ceramic coating endows the separator with outstanding electrolyte wettability and thermal stability. To be specific, the separator exhibits higher ionic conductivity (2.261 mS cm −1 ), high porosity (85.1%) and favorable electrolyte wettability (352%), and lower interfacial impedance (220 Ω). Compared with commercial polyolefin separator and PVDF nanofibrous separator, the ZrO 2 -ceramic-coated PVDF nanofibrous separator exhibits excellent rate performance and well cyclic stability. Most importantly the ZrO 2 –PDA/PEI–PVDF separator can still maintain a complete structure even at a high temperature of 300 °C. Compared with commercial separators, it greatly improves the safety of lithium ion batteries at high temperature. Therefore, this separator has far-reaching prospects for improving lithium ion safety and cycle stability.
研究领域:
材料科学
·
能源技术
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产品关联
DOI
高影响因子
Materials Today Communications
·
2024
·
IF 3.7
Ruifa Wu,Xuanyu Zhang,Ming Deng,Mi Zhou,Kaikai Jin,Wei Xu,Ruifeng Li,Kai Kang,Chaoyu Xiang
Zirconia nanoparticles (ZrO 2 NPs) are considered promising functional materials due to their high refractive index , thermal stability, and relatively wide bandgap. They can be particularly valuable when blended with monomer resins to create transparent composite materials with tunable refractive indices. However, the challenge of synthesizing uniformly sized and transparently dispersible ZrO 2 NPs in organic resin monomers has been an ongoing research problem. In this study, we proposed an improved method based on an existing synthesis route for the production of ZrO 2 NPs. We employed a sol-gel approach and introduced a simple yet effective strategy to synthesize ZrO 2 NPs. Using high-boiling non-coordinating solvent squalane to adjust the concentration of oil amine ligands in the solution, helped to balance the nucleation and growth of ZrO 2 , thereby improving the size uniformity of ZrO 2 NPs. In addition, the addition of sodium hydroxide (NaOH) to the reaction system effectively promoted the crystal growth of ZrO 2 without affecting its crystal structure and crystallinity . Simultaneously, this addition significantly reduced the content of surface oleylamine (OAm) ligands. Finally, ZrO 2 was modified using 2-Ethylhexanoic acid (EHA) and 3-methacryloxypropyltrimethoxysilane (KH-570), achieving successful transparent dispersion within the high refractive index acrylic monomer , benzyl acrylate (BZA). In-situ polymerization was used with a UV initiator to produce a refractive index continuously tunable BZA/ZrO 2 composite film .
研究领域:
材料科学
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纳米技术
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Xiaofang Wang,Ran Yu,Liying Pu,Mingqiao Chen,Xingyu Zhu,Shangpeng Fan,Peng Liu,Xiang Shen
Membrane technologies have been extensively employed to separate and purify emulsified oily wastewater. However, the long-term performance of membranes is still restricted by oil fouling and their inability to function in severe conditions. Herein, ZrO 2 nanoparticles were deposited onto the poly(vinylidene fluoride) membrane surface using γ-aminopropyl triethoxysilane (KH550) as a coupling agent, as inspired by a biomimetic coating method of polydopamine (PDA). It has been determined that the distribution density of nanoparticles can be tuned by adjusting the KH550 and ZrO 2 concentrations. After coating the PDA and ZrO 2 layers, the nanocomposite membrane exhibits a high degree of hydrophilicity, underwater superoleophobicity, and anti-oil-fouling properties. This outstanding characteristic endows the membrane with an ultrahigh permeation flux of emulsion and a rejection ratio of over 99 % for a variety of oil/water emulsions. The flux recovery of the nanocomposite membrane remains at over 91 % after thirteen cyclic filtrations of emulsions. Moreover, the excellent surface wettability and oil/water separation properties of the nanocomposite membranes can be maintained under prolonged exposure to strong acid, alkali, and salt solutions.
研究领域:
材料科学
·
环境工程
✓ 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）