International Journal of Minerals Metallurgy and Materials
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2020
·Vol. 27
·期 9
·1216-1225
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IF 1.713
Wei Wang,Yue Hong-rui,Xue Xiang-xin
This study investigated the interdiffusion of calcium ferrite/calcium titanate system in the time range of 0–120 min by the diffusion couple method in a CO/N 2 reducing atmosphere at 700°C. The results show that after the diffusion reaction occurred, no longitudinal agglomerations were present on the substrate surface on the calcium titanate side. When the diffusion time was increased to 105 min, a net vacancy flow from calcium titanate to calcium ferrite might have occurred, causing the surface of the calcium ferrite substrate to collapse. The thickness of the diffusion layer of the calcium ferrite/calcium titanate system was about 17–48 µm, which conforms to the parabolic law of diffusion. The diffusion coefficient and the Ti 4+ concentration in the calcium ferrite/calcium titanate system are related. This shows an increase in the diffusion coefficient with the increase of Ti 4+ concentration, and the diffusion coefficient value was in the range of 10 −12 –10 −11 cm 2 ·s −1 .
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2021
·
IF 5.302
Mingxin Liu,Jie Li,Ying Tang,Junqi Chen,Laiyuan Ao,Alin Cao,Liang Fang
The τ f of Y 3 Ga 5 O 12 ceramics was adjusted by Ca 2+ /Ti 4+ co-doping for Y 3+ at A-site and Ga 3+ at C-site to form Ca x Y 3- x Ti x Ga 5- x O 12 (0 ≤ x ≤ 2.0) ceramics by the solid-state reaction. When 0 ≤ x ≤ 1.7, all the samples remained as single garnet-structured with Ia- 3 d space group. The ε r increased from 10.4 ± 0.1 to 15.9 ± 0.1, and τ f optimized from −54.7 ± 1.0 to −8.3 ± 1.0 ppm/℃, attributing to the increase in polarizability per volume and “rattling” effect. Meanwhile, the Q × f slightly decreased from 98,200 ± 500 GHz to 65,300 ± 500 GHz due to the decrease in packing fraction. As x increased to 2.0, the properties dramatically deteriorated owing to the second phase CaTiO 3 . Optimal properties were obtained at x = 1.7, with ε r = 15.9 ± 0.1, Q × f = 65,300 ± 500 GHz and τ f = −8.3 ± 1.0 ppm/℃.
研究领域:
材料科学
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电子材料
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DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2020
·
IF 4.495
Kang Du,Fei Wang,Xiao-Qiang Song,Yan-Bo Guo,Xiao-Chuan Wang,Wen-Zhong Lu,Wen Lei
The crystal structure and dielectric properties of Ti 4+ -substituted CaSnSiO 5 ceramic were investigated. Ti 4+ entirely substituted Sn 4+ of CaSnSiO 5 , and the solid solutions were formed at Ca(Sn 1- x Ti x )SiO 5 (0 ≤ x ≤ 1.0) ceramics. The evolutions of crystal structure were analysed through Rietveld refinement and transmission electron microscopy , and the phase transition from A 2/ a to P 2 1 / a space groups at Ca(Sn 1- x Ti x )SiO 5 (0.9 ≤ x ≤ 1.0) ceramics was clarified. The change in dielectric properties was related to the structural evolution of Ca(Sn 1- x Ti x )SiO 5 (0 ≤ x ≤ 1.0). The τ f values of Ca(Sn 1- x Ti x )SiO 5 (0 ≤ x ≤ 0.4) ceramics initially decreased to +49.8 ppm/°C and then increased to +98.3 ppm/°C because of Sn/TiO 6 octahedral distortion. The temperature coefficient of capacitance and ε r anomaly peak were controlled by Ti 4+ substitution for Sn 4+ at Ca(Sn 1- x Ti x )SiO 5 (0.4 ≤ x ≤ 1.0) ceramics. The results provided a way to control the τ f value of microwave dielectric ceramics .
研究领域:
材料科学
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陶瓷学
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DOI
高影响因子
Materials Today Energy
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2026
·
IF 8.1
Yan Sun,Jianbo Tong,Xuan Yang,Yawei Hu,Shuling Liu,Xuexia Song,Ye Gong,Jiaxuan Zuo,Jingjing Wang,Wenbin Li,Xifei Li
Li 3 YCl 6 (LYC) still faces challenges such as insufficient ionic conductivity and unstable interfacial contact. In this work, the solid electrolyte Li 3-x Y 1-x Ti x Cl 6 (0 ≤ x < 1) is successfully synthesized via aliovalent substitution of Y 3+ by Ti 4+ . Such aliovalent doping generates additional lithium vacancies within the lattice structure, which furnish extra migration sites for Li + and consequently lower the lithium diffusion energy barrier. Therefore, the material delivers an ionic conductivity of 0.66 mS cm −1 at x = 0.2, which is over 3 times higher than that of LYC. Furthermore, the introduction of Ti 4+ enhances the thermal and air stability, while exerting no significant influence on the electrochemical stability window of LYC. Benefiting from the good ionic conductivity, the all-solid-state battery using NCM811/LYTC retains 82.1% of its capacity after 500 cycles, demonstrating remarkable cycling and rate performance. Overall, more lithium vacancies effectively optimize migration pathways and lower migration barriers. The findings provide a practical reference for designing solid electrolytes with balanced performance and high safety.
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DOI
高影响因子
ANALYST
·
2016
·Vol. 141
·期 11
·3421-3427
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IF 4.033
Dongpo Xu,Mingxia Gao,Chunhui Deng,Xiangmin Zhang
Ti4+ immobilized SiO2 graphene-like multilayer nanosheets were designed and synthesized for the ultrasensitive enrichment of phosphopeptides with the detection limit of 1.0 pg μL−1 (4 × 10−17 mol μL−1). The enrichment selectivity of the nanosheets was evaluated by capturing phosphopeptides from a peptide mixture of bovine β-casein (β-casein) and bovine serum albumin (BSA) with the molar ratio of 1 : 1000 (1.7 × 10−12 mol of β-casein and 1.7 × 10−9 mol of BSA in 100 μL).
研究领域:
生物化学
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分析化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2021
·Vol. 104
·期 11
·6054-6063
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IF 3.784
Xing Zhang,Cheng Liu,Liang Shi,Wenhao Xu,Hongyang Zhang,Rui Zeng,Huaiwu Zhang
Ti 4+ -modified MgZrNb 2 O 8 (MgZr 1- x Ti x Nb 2 O 8 , x = 0, 0.1, 0.2, 0.3, 0.4) ceramics were synthesized using the traditional solid-state reaction method. Pure MgZr 1– x Ti x Nb 2 O 8 was detected without any secondary phase via the X-ray diffraction patterns. According to the sintering behavior and the surface morphology results, the introduction of Ti 4+ reduced the sintering temperature and promoted the grain growth. The correlations between the dielectric properties and the crystal structure were analyzed through the Rietveld refinement and Raman spectroscopy. The slight shifts of the Raman peaks, corresponding to different vibration modes, were induced by the substitution of Ti 4+ for Zr 4+ and related to the improved quality factor. In general, the sample of MgZr 0.9 Ti 0.1 Nb 2 O 8 sintered at 1320°C for 4 h exhibited promising microwave dielectric properties with an ultra-high Q × f value of 130 123 GHz (at 7.308 GHz, 20°C), which is potential for 5G communication applications.
研究领域:
材料科学
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物理学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 2
·1-12
·
IF 2.8
Su Qi,Qu Jing-Jing,Liu Fei,Feng Ai-lin,Yuan Chang-Lai,Liu Xiao,Meng Liu-Fang,Ding Guo-An,Su Ming-wei,Chen Guo-Hua
A series of new systems of the SrCe 1- x Ti x O 3 and SrCe 1− x Zr x O 3 (SCT x and SCZ x , x = 0.0–0.1) ceramics have been prepared by the traditional solid-phase methods. The XRD patterns results show that an ABO 3 -type perovskite structure of the SrCeO 3 ceramic can be obtained as x = 0.0. With the increase in Ti 4+ - and Zr 4+ -ions-doping content of x = 0.02–0.1, the SCT x and SCZ x ceramics basically belong to the perovskite phase with the orthorhombic structure of the space group Pmcn (62), and the results of EDS analysis on the proportion of each element can also verify the correctness of the XRD analytical results. In addition, all the microstructures are dense for the SCT x and SCZ x ( x = 0.0–0.1) samples. The fitting results of complex plane impedance verified that the temperature stability of SCT x solid solution ceramics is more suitable for adjusting to the practical application range. Especially, the SCT x ( x = 0.03) ceramics sintered at 1270 °C for 4 h can obtain the relatively excellent dielectric properties of ε r = 50.16, Q × f = 8,940 GHz (at 5.91 GHz), and τ f = + 0.08 ppm/°C.
研究领域:
材料科学
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陶瓷工程
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产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Liuyan Zhou,Yanling Chen,Yuyu Shen,Jianhua Lin,Jie Fu,Lei Lei,Renguang Ye,Degang Deng,Shiqing Xu
Down/upconversion Ca14Al10Zn6O35 inorganic phosphors codoped with Ti4+/Eu3+ or Yb3+/Er3+ were prepared. The crystal structure and downconversion luminescence properties of Ca14Al10Zn6O35:Ti4+, Eu3+ phosphors were studied in detail. Ti4+ and Eu3+ occupied Al3+ and Ca2+ sites in the host lattice, respectively. Under the excitation of 273 nm, the emission peak in the 300–570 nm band originated from the 2T2 → O2– transition of Ti4+. The f–f transition of Eu3+ ions generated multiple peaks in the 570–800 nm range. The emission intensity of Ti4+ and Eu3+ ions can be used as a fluorescence intensity ratio (FIR) signal. Based on the FIR technology, the maximum relative sensitivity (Sr) and the minimum temperature uncertainty (δT) reached 1.41% K–1 and 0.07 K, respectively. Meanwhile, the temperature-sensing behaviors were explored by the temperature-dependent upconversion spectra of Er3+- and Yb3+-codoped Ca14Al10Zn6O35 phosphors. Based on the fluorescence intensity ratio of thermal coupling levels (Er3+:2H11/2/4S3/2), the maximum Sr and minimum δT of upconversion phosphors reached 1.28% K–1 and 0.08 K in the temperature range of 293–473 K, respectively. Ca14Al10Zn6O35:Ti4+/Eu3+ (Yb3+/Er3+) phosphors realize temperature sensors with higher relative sensitivity, and it is a good candidate material for optical temperature measurement.
研究领域:
材料科学
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光学传感器
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发光材料
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固体物理
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DOI
高影响因子
Analytical Methods
·
2016
·Vol. 9
·期 3
·443-449
·
IF 1.915
Yiman Zhao,Lingyi Zhang,Zhanying Chu,Zhichao Xiong,Weibing Zhang
For in-depth analysis of phosphorylated proteomics, the highly sensitive and selective capture of phosphopeptides from intricate biological samples is extremely significant. In this work, a late-model immobilized metal ion affinity chromatography (IMAC) material was fabricated and applied to enriching phosphopeptides from biological samples by abundant Ti4+ ions, which were chelated to crosslinked chitosan (CS) loaded on the surface of magnetic graphene oxide (GO) (denoted as mag GO–CS–Ti4+). The high amount of crosslinked CS endowed the IMAC material with highly hydrophilic properties and abundant active sites for Ti4+ ions on the surface. These characteristics ensure the great performance of mag GO–CS–Ti4+ in the selective enrichment of phosphopeptides from the tryptic digest of β-casein with high selectivity (phosphopeptides to non-phosphopeptides at a molar ratio of 1 : 400), high sensitivity (0.5 fmol), large enrichment capacity (66.6 mg g−1), prominent phosphopeptide recovery (93.11%), and excellent reusability. What's more, mag GO–CS–Ti4+ was applied to capturing phosphopeptides from real biological samples, human serum from both healthy people and patients and nonfat milk. The results successfully manifested that the mag GO–CS–Ti4+ could be a great affinity material for the enrichment of low-abundant phosphopeptides from biological samples.
研究领域:
蛋白质组学
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分析化学
·
生物医学
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产品关联
DOI
高影响因子
TALANTA
·
2019
·
IF 4.916
Yu-Lin Huang,Jian Wang,Ying-Hua Jiang,Peng-Yuan Yang,Guo-Wei Wang,Feng Liu
Protein phosphorylation is a reversible and important post-translational modification. Identification of phosphopeptides without enrichment is difficult for the low-abundance of phosphopeptides in real complex biological samples. Therefore, the effective and selective concentration of phosphopeptides prior to proteomic identification by mass spectrometer is necessary. In this study, we synthesized a novel titanium-based immobilized metal ion affinity chromatography material for highly selective enrichment of phosphopeptides. To improve material hydrophilia to the maximum extent, titanium ions were immobilized on the 4-armed Poly(ethylene oxide)(4μ-PEO-Ti 4+ ), a totally soluble polymer with large molecular weight (20000 g/mol). The 4μ-PEO-Ti 4+ was used to enrich phosphopeptides from tryptic digests of standard proteins and real complex biological samples, followed by MALDI-TOF MS analysis. In enrichment of phosphopeptides from 4 pmol β-casein, the 4μ-PEO-Ti 4+ performed the best property with starting material of 99–132 μg, loading buffer of 50% ACN/5% TFA (v/v), elution buffer of 10% NH 3 ·H 2 O (v/v) and elution time of 30 min. The 4μ-PEO-Ti 4+ has a superior detection sensitivity as low as 2 fmol for phosphopeptides. The high selectivity of 4μ-PEO-Ti 4+ allows a deep enrichment of phosphopeptides of β-casein from a mixture with BSA of 1000-fold abundant. The 4μ-PEO-Ti 4+ shows great stability and endurability and can be recycled up to at least 5 times. In addition, 4μ-PEO-Ti 4+ could detect 10 and 15 phosphopeptides from non-fat milk and nonenzymatic human saliva, respectively. In total, 4μ-PEO-Ti 4+ is a novel excellent material which shows great sensitive and selective enrichment of low-abundance phosphopeptides in real complex biological samples.
研究领域:
蛋白质组学
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生物化学
·
分析化学
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DOI
PubMed
高影响因子
Journal of Physical Chemistry C
·
2017
·
IF 4.536
Chaonan Mu,Kaixiang Lei,Haixia Li,Fujun Li,Jun Chen
Tunnel-type Li3VO4 (LVO) has become of great interest as a promising anode material for lithium-ion batteries owing to its large capacity, low cost, and safe potentials. However, the poor conductivity of LVO limits its wide applications. Here, LVO was doped with 0.05 unit of Ti4+ in each formula (LTVO) via a solid-state synthetic method to increase its conductivity and structural stability. The partial replacement of V5+ with Ti4+ leads to formation of additional interstitial Li+ ions in the octahedrons between MO4 (M = Li, V) tetrahedrons and hence improves Li+ ion diffusion kinetics. The resultant LTVO electrode exhibits a high discharge/charge capacity of ∼376 mAh g–1 at 20 mA g–1. Good cycling stability over 500 cycles with small polarization is achieved at 1000 mA g–1. This makes it a promising anode for Li-ion batteries.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2018
·
IF 6.042
Yayun Hong,Yating Yao,Hongli Zhao,Qianying Sheng,Mingliang Ye,Chengzhong Yu,Minbo Lan
Selective enrichment and sensitive detection of phosphopeptides are of great significance in many bioapplications. In this work, dendritic mesoporous silica nanoparticles modified with polydopamine and chelated Ti4+ (denoted DMSNs@PDA-Ti4+) were developed to improve the enrichment selectivity of phosphopeptides. The unique central-radial pore structures endowed DMSNs@PDA-Ti4+ with a high surface area (362 m2 g–1), a large pore volume (1.37 cm3 g–1), and a high amount of chelated Ti4+ (75 μg mg–1). Compared with conventional mesoporous silica-based materials with the same functionalization (denoted mSiO2@PDA-Ti4+) and commercial TiO2, DMSNs@PDA-Ti4+ showed better selectivity and a lower detection limit (0.2 fmol/μL). Moreover, 2422 unique phosphopeptides were identified from HeLa cell extracts with a high specificity (>95%) enabled by DMSNs@PDA-Ti4+, better than those in previous reports.
研究领域:
生物化学
·
分析化学
·
纳米材料科学
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DOI
PubMed
高影响因子
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