CHINESE CHEMICAL LETTERS
·
2025
·
IF 8.9
Haoran Yu,Liang Cao,Jiajia Wang,Jian Guo,Ji Zhang,Shan-Tao Zhang
Piezoelectric materials have wide commercial applications involving our everyday lives. The common categorized “soft” and “hard” piezoelectric materials have distinct even contradictory performance parameters typically exemplified by piezoelectric coefficient d 33 and mechanical quality factor Q m . However, for some special devices operated in resonant mode, simultaneously high or at least balanced performance parameters are needed. Here, we show the transition from “soft” to “hard” performance in 2 mol% Sm doped (0.36- x )Pb(Ni 1/3 Nb 2/3 )O 3 - x Pb(Mn 1/3 Nb 2/3 )O 3 -0.28PbZrO 3 -0.36PbTiO 3 quaternary solid solution piezoceramics, for which the d 33 and planar electromechanical coupling factor k p decrease, while Q m and Curie temperature T c increase monotonously with increasing x value. As the results, balanced performance with moderate d 33 = 446 pC/N, k p = 0.49, Q m = 425, and T c = 170 °C are achieved around x = 0.03. This work not only shows the feasibility for combining “soft” and “hard” performance by forming appropriate solid solutions, but also provides a suitable material basis for further simultaneously optimizing piezoelectric parameters.
✓ 已验证
产品关联
DOI
高影响因子
IEEE SENSORS JOURNAL
·
2024
·Vol. 24
·期 16
·26354-26368
·
IF 4.3
Shengwen Shu,Ruojun Yu,Han Qiu,Longlong Shu,Yongling Lu,Zhen Wang
To realize passive vibration monitoring of power transformers, this study proposes a self-powered method for transformer vibration monitoring sensors based on the Sm-doped-Pb(Mg1/3Nb2/3)O3-PbTiO3 (PMN-PT) piezoelectric bimorph array. This study conducts the theoretical analysis and field measurement of the transformer vibration signals. In addition, the preparation method of a high-performance Sm-doped-PMN-PT piezoelectric bimorph is investigated. The properties of the xSm-PMN-yPT ceramics are also analyzed. Further, the output voltage and power characteristics of the piezoelectric bimorph arrays with different combinations are compared. Finally, the validation and application of the prototype are presented. The experimental results show that the 2.5%Sm-PMN-32PT has a high piezoelectric coefficient (d33) of 1710 pC/N. The results also indicate that the piezoelectric self-powered device with a parallel structure consisting of nine piezoelectric bimorphs has a maximum power generation of 2.341 mW under the measured transformer vibration excitation. Moreover, it is shown that it takes 75 min to complete the charging of the 7.5 V-1-F faradic capacitor from 4.4 to 5 V to satisfy the condition for the required energy of 2.82 J for the vibration signal acquisition, processing, and transmission, realizing the intermittent passive vibration monitoring of the transformer for 16 times per day. Therefore, the proposed method has a promising engineering application prospect.
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Hongrui Jia,Jiahao Mi,Zhen Li,Linghang Wang
Sm-doped Pb(Mg 1/3 Nb 2/3 )-PbTiO 3 (PMN-PT) binary ferroelectric ceramics has received extensive attention due to the excellent dielectric and piezoelectric properties . However, its Curie temperature ( T c ) is greatly reduced by Sm doping and T c is only 89 °C at the optimum piezoelectric coefficient. In this work, Sm-doped Pb(Mg 1/3 Nb 2/3 )O 3 –Pb(Zn 1/3 Nb 2/3 )-PbTiO 3 (Sm: PMN-PZN-PT) ternary ferroelectric ceramics near MPB were successfully manufactured and the crystal structure, microstructure and electric properties were investigated with respect to Sm doping content. A high piezoelectric coefficient of 870 pC/N and a high T c of 146 °C were achieved simultaneously in PMN-PZN-PT ternary ceramics with 1% Sm doping content. In addition, the room temperature dielectric constant was greatly improved by Sm doping and the P r , P s and E c values gradually decrease with the increase of Sm content. These results indicate that Sm-doped PMN-PZN-PT ceramics may be an attractive material for high performance piezoelectric device applications.
✓ 已验证
DOI
高影响因子
Molecular Catalysis
·
2017
·
IF 0
Peng Sun,Rui-tang Guo,Shu-ming Liu,Shu-xian Wang,Wei-guo Pan,Ming-yuan Li,Shuai-wei Liu,Jian Liu,Xiao Sun
CeSmOx mixed oxide catalysts supported on TiO 2 prepared by coprecipitation method were used for selective catalytic reduction of NOx with NH 3 . The results showed that the addition of Sm could effectively enhance the low-temperature SCR activity and SO 2 /H 2 O resistance of Ce/TiO 2 catalyst, and the appropriate mole ratio of Sm to Ce was 0.3. Characterization results indicated that the introduction of Sm could promote the formation of Ce 3+ and chemisorbed oxygen species on catalyst surface, which was favorable to the generation of NO 2 . Moreover, the doping of Sm could also promote the adsorption of NH 3 and NOx species on Ce/TiO 2 catalyst. The results of in situ DRIFT study revealed that the NH 3 -SCR reaction over CeSm/TiO 2 -0.3 catalyst was mainly controlled by the Langmuir−Hinshelwood mechanism in the low temperature range (<200 °C). Thereafter, the promoted NO oxidation and the enhanced NH 3 adsorption should play a major role for the excellent low-temperature SCR performance of CeSm/TiO 2 -0.3 catalyst.
✓ 已验证
DOI
CERAMICS INTERNATIONAL
·
2026
·
IF 5.6
Jiaxin Li,Qunwei Guo,Jiangtao Feng,Yinwen Gu,Bo Chi,Jian Pu
To fulfill the real-time monitoring requirements for the high SO 2 concentrations in industrial emissions, yttria-stabilized zirconia (YSZ)-based mixed-potential SO 2 sensors with rare-earth vanadates (AVO 4 , A = Ce, Sm) as sensing electrode materials were investigated in this work. The microstructure of the AVO 4 electrode was tuned by adjusting the corresponding sintering temperature (800-1100 °C), reaching the optimal match between particle size and pore structure at 1000 °C. The CeVO 4 sensor sintered at 1000 °C exhibited the best performance at the operation temperature of 400 °C, in which its polyhedral structure and the formation of CeVO 4 /CeO 2 heterointerfaces enhanced the diffusion and adsorption of SO 2 , achieving a response of -69.73 mV for 500 ppm SO 2 and a sensitivity of -25.92 mV/decade for 50-500 ppm SO 2 , significantly higher than that of the SmVO 4 electrode (-18.87 mV, -12.81 mV/decade). Additionally, the sensor can be operated at a wide temperature range from 400 °C to 600 °C. The response/recovery times were significantly shortened to 31 s/45 s (100 ppm) and 11 s/33 s (500 ppm) at 600 °C, approximately 90% faster than those of 400 °C, while maintaining a sensitivity of -13.06 mV/decade for 50-500 ppm SO 2 . Furthermore, the sensor exhibited excellent repeatability and long-term stability at 600 °C, which remained stable for 18 days with a slight response variation of < 8%. This study provides novel material design and optimization strategies for developing high-sensitivity SO 2 sensors with a wide detection range and rapid response ability, which are capable of operating under harsh industrial conditions.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2026
·
IF 14.3
Binbin Ning,Junyao Wu,Sai Liu,Jinwei Guo,Xiaopeng Hu,Qing Liu,Wang Zhu
A series of five (5RE 0.2 )Ta 3 O 9 high-entropy ceramics (RE = La, Gd, Nd, Dy, Sm, Eu, Ce) is successfully synthesized via a solid-state method. Their temperature-dependent fracture toughness is systematically investigated across the 25–1200 °C range, using in situ three-point bending tests coupled with the digital image correlation method. The fracture toughness exhibits a non-monotonic variation: it peaks at 2.3 MPa m 1/2 at room temperature, then sharply declines to a minimum of 1.5 MPa m 1/2 at 400 °C. Subsequently, an anomalous rebound to approximately 2.1 MPa m 1/2 is observed at 800 °C, followed by a further decrease, stabilizing between 1.7 and 1.9 MPa m 1/2 at 1200 °C. High-temperature X-ray diffraction and high-resolution transmission electron microscope results confirm an irreversible orthorhombic-to-tetragonal phase transformation occurring between 600 and 800 °C. Aberration-corrected STEM provides direct atomic-scale evidence of a high-density dislocation network interacting with crack tips, revealing dislocation pinning, bridging, and crack deflection. The combined action of phase-transformation-induced lattice strain and dislocation-mediated toughening effectively suppresses linear crack advance and enhances energy dissipation, thereby accounting for the partial recovery of fracture toughness at 800 °C. These direct observations establish a distinctive synergistic toughening mechanism in high-entropy ceramics, in which irreversible phase transformation and thermally activated dislocation networks cooperate to improve high-temperature fracture resistance.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
·
IF 7.489
Sheng Zhao,Jing Xu,Min Mao,Lingjiao Li,Xuanhao Li
A dye-sensitive photocatalytic H 2 evolution reaction (HER) system with photogenerated carrier directed conduction was constructed. The protonated g-C 3 N 4 combines with the sheet-like Co MOF to form a 2D/2D heterojunction via electrostatic self-assembly. The protonated g-C 3 N 4 and 2D Co-MOF directionally adsorb Eosin Y (EY) and triethanolamine (TEOA) molecules through hydrogen bond and complexation to achieve a whole photocatalytic system. The integral structure effectively facilitates the utilization of dye sensitizer and hole sacrificial agent to achieve the effective and stable photocatalytic H 2 evolution capacity. The photocatalytic hydrogen evolution rate of g-C 3 N 4 after protonation is 1.88 times as high as that of the original g-C 3 N 4 . On the basis of 2D/2D heterojunction, Co MOF is doped with rare earth element Sm. The 4f electrons and the difference valences (Sm 3+ and Co 2+ ) further suppress the reorganization of photogenerated excitons to achieve highly efficient photocatalytic HER. The directional coupling of sensitizer and electron sacrificial agent combined with rare earth element doping makes the photocatalytic HER rate of the composite material reached 73.42 μmol . h −1 within 5 h under simulated sunlight.
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2016
·
IF 2.758
Hao Li,Zonglian Huang,Lijin Cheng,Shu Kong,Shaojun Liu
Novel monoclinic Bi 2 O 3 -xRE 2 O 3 -yMoO 3 (RE=Pr, Nd, Sm, and Yb) based low temperature co-fired ceramics (LTCC) systems with high sintering density and low microwave dielectric loss are synthesized by conventional solid state reaction technique. The structure and dielectric properties of Bi 2 O 3 -xRE 2 O 3 -yMoO 3 ceramics are investigated. Dense BiNdMoO 6 ceramics sintered at 900 °C for 8 h in air have a low dielectric constant ε r =~7.5, a high quality factor Q × f =~ 24, 800 GHz at 7.0 GHz, and τ f =~−16 ppm/̊C. Especially, good chemical compatibility of BiNdMoO 6 with Ag electrodes is represented as well. In contrast, BiSmMoO 6 ceramics sintered at 1000 °C for 8 h show enhanced Q×f =~43, 700 GHz at 7.8 GHz with ε r = ~8.5 and τ f = ~−27 ppm/°C. Bi 2 O 3 -xRE 2 O 3 -yMoO 3 (RE=Pr, Nd, Sm, and Yb) based ceramics could be considered as promising microwave ceramics for LTCC applications.
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Ting Wang,S.-H. Song,Qing Ma,M.-L. Tan,J.-J. Chen
Multiferroic BiFeO 3 and Bi 1- x Sm x Fe 0.95 Nb 0.05 O 3 ceramics are successfully fabricated by spark plasma sintering combined with sol-gel powders. The effects of Sm and Nb co-doping on the structural, dielectric, ferroelectric and magnetic properties of the samples are investigated. With the Sm-Nb co-doping, the crystal structure of as-prepared samples transforms from R 3 c to Pnma and the grain size, loss tangent and leakage current density are reduced. The leakage current density of the co-doped samples can be reduced by approximately three orders of magnitude compared with the undoped sample. The dielectric, ferroelectric and magnetic properties are apparently enhanced due to the Sm-Nb co-doping. The optimal values of remanent polarization ( P r ) and magnetization ( M r ) of the created Bi 0.85 Sm 0.15 Fe 0.95 Nb 0.05 O 3 ceramic are approaching up to 5.853 μC/cm 2 and 0.187 emu/g, respectively. This enhancement of the multiferroic properties could be attributed to the co-doping-induced structural distortion, grain size reduction, oxygen vacancy decrease, space-modulated spin structure collapse as well as increased magnetic ions.
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2024
·Vol. 53
·期 28
·11713-11719
·
IF 3.5
Haoran Yu,Jian Guo,Jiajia Wang,Ji Zhang,Shan-Tao Zhang
As the two typical basic binary solid solutions of the relaxor-PbTiO3 family, Pb(Mg1/3Nb2/3)O3-PbTiO3 (PMN-PT) has been widely investigated, whereas Pb(Ni1/3Nb2/3)O3-PbTiO3 (PNN-PT) has not. Here, 1.5 mol% Sm-doped (1 − x)Pb(Ni1/3Nb2/3)O3–xPbTiO3, (1 − x)PNN–xPT:0.015Sm with x = 0.33–0.39, ceramics have been prepared and the chemical composition-induced evolution of crystal structure, domain, and electrical properties investigated systematically. With increasing PT content, evolution of the rhombohedral–tetragonal structure was observed. A rhombohedral–tetragonal morphotropic phase boundary occurred around x = 0.36–0.37, which showed a peak piezoelectric property with piezoelectric constant d33 = 531 pC N−1 and planar electromechanical coupling factor kp = 0.37 at room temperature. At the same time, the x = 0.36 composition showed improved ferroelectric behavior with remanent polarization Pr = 13.4 μC cm−2 and coercive field Ec = 3.2 kV cm−1. Interestingly, different from its PMN-PT counterpart, there is no temperature-driven phase transition between room temperature and the Curie temperature for (1 − x)PNN–xPT:0.015Sm. These parameters indicated that the PNN-PT system is worthy of more attention and is a promising platform for further development of high-performance piezo/ferroelectric materials.
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
·
2025
·
IF 4.2
Qinming Wang,Jinlin Wan,Sen Wu,Xingfu Zhou
To address the two critical issues of low near-infrared (NIR) photon utilization and poor ultraviolet (UV) stability in perovskite solar cells (PSCs), this study synthesized Sm 3+ and Er 3+ co-doped TiO 2 nanorod (NRs) arrays via a hydrothermal method and employed them as the electron transport layer (ETL) for carbon-based PSCs. The incorporation of Sm 3+ and Er 3+ simultaneously improves perovskite infiltration, carrier-transport efficiency, and light absorption performance. Compared with pristine TiO 2 , the Sm/Er co-doped NRs effectively suppress non-radiative recombination, reduce series resistance, improve electron mobility, and prolong carrier lifetime. Furthermore, the introduction of Sm 3+ , Er 3+ into TiO 2 NRs weakens the radial growth of nanorods. A positive bandgap shift and a negative flat-band potential shift were observed after doping. The co-doped PSCs achieved 12 % increase in conversion efficiency when compared with the undoped device. The doped perovskite exhibited strong resistance to ultraviolet-induced degradation. The device has an infrared light efficiency of 0.15 % at the wavelength of 800–1100 nm.
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Sohaib Ajmal,Liwei Zhang,Kaiyang Liu,Fangzhe Li,Shaojie Sun,Ghazanfar Mehboob,Gohar Mehboob,Hua Ke
This study investigates the effect of oxygen vacancies on the dielectric, magnetic, and optical properties of Sm and Ti co-doped bismuth ferrite (Bi 0.85 Sm 0.15 Fe 0.97 Ti 0.03 O 3 ) ceramics, labeled as BSFO N (N 2 -sintered) and BSFO O (O 2 -sintered), which exhibited a morphotropic phase boundary (MPB). X-ray diffraction analysis, Rietveld refinement, and high-resolution transmission electron microscopy confirmed that the MPB structure, comprised polar rhombohedral ( R3c ), antipolar orthorhombic ( Pbam ), and nonpolar orthorhombic ( Pnma ) phases. The nonstoichiometric ratio from Rietveld refinement revealed higher oxygen vacancies and Bi decomposition in BSFO N ceramics. Scanning electron microscopy revealed larger grain sizes with small holes in BSFO N ceramics, while BSFO N ceramics displayed a dense, hole-free morphology. X-ray photoelectron spectroscopy further confirmed the presence of higher Fe 2+ oxidation states and increased oxygen vacancy formation in the BSFO N ceramics. The BSFO N ceramic exhibited a higher dielectric constant ( ) and higher dielectric loss ( ), both of which decreased with increasing frequency. In addition, the BSFO N ceramic displayed lower impedance, higher AC conductivity, and lower activation energy. The higher oxygen vacancies in BSFO N ceramics promoted ferromagnetism. Furthermore, BSFO N ceramics exhibited a slightly reduced optical bandgap ( = 2.063 eV) and a stronger second-harmonic generation response, confirming the effect of oxygen vacancies on the optical properties of Sm and Ti co-doped bismuth ferrite ceramics with an MPB.
✓ 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）