Query：
学者姓名：路清梅
Refining：
Year
Type
Indexed by
Source
Complex
Co-Author
Language
Clean All
Abstract ：
A finite element simulation study is conducted using COMSOL Multiphysics software for tip effects such as induced potential, induced electric field intensity, and charge density of micro-tips in a micro-tips array under applied voltage. The simulation results indicate that under a constant micro-tip spacing x, the field shielding effect increases as the micro-tip curvature radius decreases. Moreover, when the tip spacing x is greater than twice the tip height h, the field shielding effect can be neglected. Based on the COMSOL simulation results of the micro-tips array, the femtosecond laser processing technology was employed to achieve controllable fabrication of micro-tips array microstructures on the (100) crystal plane of single-crystal LaB6. Under the condition of good geometric morphology of the tips, tips with a height of 10 mu m and a minimum tip curvature radius of 0.2 mu m could be processed, with good uniformity in array morphology and distribution. Field emission performance tests show that under testing conditions with a vacuum level of 1 x 10-5 Pa and an applied electric field Ea of 5.6 V/mu m, it exhibits a low turn-on electric field Et (2.7 V/mu m), a field emission current density of 4.36 A/cm2, and good emission stability.
Keyword ：
field shielding effect field shielding effect electronic ceramics electronic ceramics laser treatment laser treatment
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Yan, Long , Zhang, Xin , Zhou, Shenlin et al. Field emission tip effect and field emission performance of micro-tip arrays fabricated on single-crystal LaB6 [J]. | JOURNAL OF THE AMERICAN CERAMIC SOCIETY , 2025 . |
| MLA | Yan, Long et al. "Field emission tip effect and field emission performance of micro-tip arrays fabricated on single-crystal LaB6" . | JOURNAL OF THE AMERICAN CERAMIC SOCIETY (2025) . |
| APA | Yan, Long , Zhang, Xin , Zhou, Shenlin , Rong, Qinglin , Liu, Nan , Zhang, Wei et al. Field emission tip effect and field emission performance of micro-tip arrays fabricated on single-crystal LaB6 . | JOURNAL OF THE AMERICAN CERAMIC SOCIETY , 2025 . |
| Export to | NoteExpress RIS BibTex |
Abstract ：
The high injected electron concentration and low work function C12A7:e- was successfully prepared by the solgel method combined with spark plasma sintering(SPS) using calcium nitrate, aluminum nitrate, citric acid, and ethylene glycol as raw materials. By analyzing the morphology of carbon and its role in the reactive synthesis, we reveal the reaction synthesis mechanism of C12A7:e- under the SPS. The analysis shows that C12A7:e- started to be generated at 800 degrees C. During the SPS reaction sintering process, carbon atoms from citric acid and ethylene glycol were excited by a pulsed current at high temperature, forming the carbon ions C22- and C (gas). Both act as reducing agents and react with the free oxygen ions O2- in the C12A7 cage cavity to form gaseous CO or CO2, enabling electrons to be injected into the cage cavity, thus generating C12A7:e-. Meanwhile, the graphene oxide (GO) formed on the surface of C12A7:e- grain is produced by the precursor of sol-gel synthesis in the high temperature oxidation environment, which will be conducive to improving the stability of C12A7: e- in air and high temperature oxidation resistance.
Keyword ：
Spark plasma sintering Spark plasma sintering Reaction mechanism Reaction mechanism Graphene oxide Graphene oxide Sol-gel synthesis Sol-gel synthesis
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Wang, Shouyong , Han, Shangru , Zhang, Xin et al. Synthesis and reaction mechanism of high injected electron concentration and low work function [Ca24Al28O64]4+:(4e-) by Sol-gel method combined with spark plasma sintering [J]. | JOURNAL OF ALLOYS AND COMPOUNDS , 2024 , 1003 . |
| MLA | Wang, Shouyong et al. "Synthesis and reaction mechanism of high injected electron concentration and low work function [Ca24Al28O64]4+:(4e-) by Sol-gel method combined with spark plasma sintering" . | JOURNAL OF ALLOYS AND COMPOUNDS 1003 (2024) . |
| APA | Wang, Shouyong , Han, Shangru , Zhang, Xin , Liu, Nan , Luo, Zhuang , Rong, Qinglin et al. Synthesis and reaction mechanism of high injected electron concentration and low work function [Ca24Al28O64]4+:(4e-) by Sol-gel method combined with spark plasma sintering . | JOURNAL OF ALLOYS AND COMPOUNDS , 2024 , 1003 . |
| Export to | NoteExpress RIS BibTex |
Abstract ：
The Formations, stabilities, evolutions of geometries, electronic states together with the spin polarization transitions involved with magnetic properties of the MnGa compound under c axis anisotropic stress are systematically studied within the framework of density functional theory analyzing method. The results show that the anisotropically geometric expansion can be induced under stress. There are five kinds of atomic distances within the compound, with larger distance values for Mn-Mn and Ga-Ga, and smaller distances for Mn-Ga. The induced atomic distance fluctuations are also anisotropic, corresponding to the anisotropic binding strength regulations. The compound under stress is more stable. The s orbital releases electrons, the p and the d orbitals accept electrons for Mn. The s orbital and the d orbital release electrons, the p orbital traps electrons for Ga. The Mn1 and Mn2, Ga1 and Ga2 have diversified configurations under stress. A transition of ionic state of Mn2 is observed. Electrons transfers occur between orbitals and species under stress. The MnGa has anisotropic conductor band structure. The effective mass of conduction band as well as shallow valence band are enhanced under stress. The electronic band experiences a transition from semimetal into metal. The s, p and d electrons form the conduction band and shallow valence band. The d electrons mainly form the deep valence band, too. The localization at-16.8eV of d electrons is weakened under stress. The Mnd electrons get less responsible for the spin state under stress. The Mn1 and Mn2 turn to exhibiting distinctively diverse profiles, the Ga1 and Ga2 turn to exhibiting the same profiles under stress. The Mn shows strong atomic magnetic moment than that of Ga.
Keyword ：
Geometry Geometry MnGa MnGa Stress Stress Spin polarization transition Spin polarization transition
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Zhang, G. L. , Lu, Q. M. , Zhang, F. P. et al. Study on formation, electronic states evolution and spin polarization transition for MnGa compound under an anisotropic stress [J]. | PHYSICA B-CONDENSED MATTER , 2022 , 639 . |
| MLA | Zhang, G. L. et al. "Study on formation, electronic states evolution and spin polarization transition for MnGa compound under an anisotropic stress" . | PHYSICA B-CONDENSED MATTER 639 (2022) . |
| APA | Zhang, G. L. , Lu, Q. M. , Zhang, F. P. , Yue, M. . Study on formation, electronic states evolution and spin polarization transition for MnGa compound under an anisotropic stress . | PHYSICA B-CONDENSED MATTER , 2022 , 639 . |
| Export to | NoteExpress RIS BibTex |
Abstract ：
A field-emission microtips array with a radius of curvature, height, and separation distance of 0.5, 5, and 4 mu m, respectively, was processed on the single-crystal Gadolinium hexaboride ceramic (GdB6) (100) plane using a femtosecond laser. The height and morphology of the microtips array were uniform, and the crystal structure and phase composition of GdB6 did not change after the processing. According to the field-emission performance test of a GdB6 microtips array, the turn-on electric field intensity was 1.9 V/mu m, and the field-emission current density reached 0.49 A/cm(2) when the applied electric field strength was 6.7 V/mu m; meanwhile, it had outstanding field-emission stability. Subsequently, the transmission process of the field-emission current of the GdB6 between the cathode and the anode was simulated using COMSOL Multiphysics 5.6 software. The transmission process of the electron beam from emitters to the anode surface was divided into three stages due to the interaction between emission electrons and a magnetic field generated by its motion, including divergence, pinch, and drift. The increase of electric field strength reduced the radial displacement of the electron beam while moving the beam waist further away from the anode surface. The simulation results provide theoretical guidance for regulating the shape of the field-emission electron beam, size, and energy.
Keyword ：
Emission electron beam Emission electron beam Filed-emission microtips array Filed-emission microtips array Gadolinium hexaboride (GdB6) Gadolinium hexaboride (GdB6) Transmission process Transmission process
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Liu, Weikang , Zhang, Xin , Liu, Hongliang et al. Field emission and electron beam transmission characteristics of microtips array on the (100) plane of single-crystal Gadolinium hexaboride ceramic [J]. | CERAMICS INTERNATIONAL , 2022 , 48 (6) : 8395-8402 . |
| MLA | Liu, Weikang et al. "Field emission and electron beam transmission characteristics of microtips array on the (100) plane of single-crystal Gadolinium hexaboride ceramic" . | CERAMICS INTERNATIONAL 48 . 6 (2022) : 8395-8402 . |
| APA | Liu, Weikang , Zhang, Xin , Liu, Hongliang , Li, Jichao , Zhou, Ning , Liu, Yanqin et al. Field emission and electron beam transmission characteristics of microtips array on the (100) plane of single-crystal Gadolinium hexaboride ceramic . | CERAMICS INTERNATIONAL , 2022 , 48 (6) , 8395-8402 . |
| Export to | NoteExpress RIS BibTex |
Abstract ：
The nanostructured Mg3Sb2 and Mg3.17Y0.03Sb1.985Te0.015 bulks were prepared using the induction melting-melt spinning (MS)-spark plasma sintering (SPS) method. The grain size of the sample prepared by this method was 50-80 nm. Mg3Sb2 materials co-doped with Y and Te effectively improved the carrier concentration and mobility. The room temperature carrier concentration was significantly increased from 1.28 x 10(18) cm(-3) for Mg3Sb2 to 7.12 x 10(19) cm(-3) for Mg3.17Y0.03Sb1.985Te0.015, and carrier mobility from 21.80 cm(2)V(-1) s(-1) for Mg3Sb2 to 67.53 cm(2)V(-1) s(-1) for Mg3.17Y0.03Sb1.985Te0.015. More carriers were introduced by the doping of the Mg site with the Y element. When Te replaced Sb in the covalent bonding layer, it weakened the polar covalent bond with Mg, thus favoring the movement of carriers. Meanwhile, the co-doping of Y and Te enhanced phonon scattering and reduced the thermal conductivity. The thermal conductivity of the nanostructured Mg3.17Y0.03Sb1.985Te0.015 is about 0.74 Wm(-1) K-1, which was only 69% of the bulk counterparts. When the grain size reached the nanometer scale, the grain boundary density increased substantially. The periodic potential field within a single grain was destroyed at the grain boundary. The interface interfered with the carriers and phonon transport, which further reduced the thermal conductivity. At 773 K, the ZT peak value of the nanostructured Mg3.17Y0.03Sb1.985Te0.015 was improved to 1.28, which was significantly higher than that of the non-doped samples.
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Wang, Yingjie , Zhang, Xin , Wang, Yang et al. High thermoelectric performance of nanostructured Mg3Sb2 on synergistic Te-doping and Mg/Y interstitial [J]. | JOURNAL OF MATERIALS SCIENCE , 2022 , 57 (5) : 3183-3192 . |
| MLA | Wang, Yingjie et al. "High thermoelectric performance of nanostructured Mg3Sb2 on synergistic Te-doping and Mg/Y interstitial" . | JOURNAL OF MATERIALS SCIENCE 57 . 5 (2022) : 3183-3192 . |
| APA | Wang, Yingjie , Zhang, Xin , Wang, Yang , Liu, Nan , Liu, Yanqin , Lu, Qingmei . High thermoelectric performance of nanostructured Mg3Sb2 on synergistic Te-doping and Mg/Y interstitial . | JOURNAL OF MATERIALS SCIENCE , 2022 , 57 (5) , 3183-3192 . |
| Export to | NoteExpress RIS BibTex |
Abstract ：
The [Ca24Al28O64](4+):4e(-) (C12A7:e(-)) electride is a conductive oxide ceramic with high injected electron concentration and low work function, but its brittleness leads to difficulty in mechanical processing and low production yield. The present work aimed at improving the mechanical properties of C12A7:e(-) by introducing monoclinic ZrO2. When the ZrO2 content was 5 wt%, the fracture toughness increased 133% from 1.819 to 4.214 MPa m(1/2) and the flexural strength increased 116% from 15.916 to 34.469 MPa for C12A7:e(-)-5 wt% ZrO2, indicating that ZrO2 can effectively improve the mechanical properties of C12A7:e(-). The microstructure and phase analysis showed that the toughening mechanisms of ZrO2 composite C12A7:e(-) contain both stress-induced phase transformation toughening and dispersion toughening of ZrO2 particles. When the content of ZrO2 is between 0 and 5 wt%, the injected electron concentration of C12A7:e(-)-ZrO2 was maintained in the range of 2.05-2.10 x 10(21) cm(-3) and illustrate excellent electrical transport properties. The study indicated that adding ZrO2 in C12A7:e(-) effectively solves the problem of brittle fracture, improves the finished product rate during processing, and maintains its excellent electrical transport properties.
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Luo, Zhuang , Ju, Shanshan , Zhang, Xin et al. [Ca24Al28O64](4+):4e(-) electride ceramic realizes mechanical and electrical transport properties coordinated regulation via composite ZrO2 [J]. | JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS , 2022 , 33 (9) : 6380-6388 . |
| MLA | Luo, Zhuang et al. "[Ca24Al28O64](4+):4e(-) electride ceramic realizes mechanical and electrical transport properties coordinated regulation via composite ZrO2" . | JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS 33 . 9 (2022) : 6380-6388 . |
| APA | Luo, Zhuang , Ju, Shanshan , Zhang, Xin , Zhao, Weikang , Liu, Fei , Yin, Zhanqing et al. [Ca24Al28O64](4+):4e(-) electride ceramic realizes mechanical and electrical transport properties coordinated regulation via composite ZrO2 . | JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS , 2022 , 33 (9) , 6380-6388 . |
| Export to | NoteExpress RIS BibTex |
Abstract ：
(Ca1-xCux) 12A7: e(-) bulks (0 <= x <= 0.05) with electrical performance were fabricated by the in-situ aluminothermic synthesis. The results showed that all the electron concentrations of (Ca1-xCux) 12A7: e(-) reached the theoretical value of about 2.28 x 10(21) cm(-3). In (Ca0.96Cu0.04) 12A7: e(-), the electron mobility at room temperature increased from 3.81 to 5.19 cm(2) V-1 S-1 and the conductivity increased from 415 to 1405 S cm(-1). It indicated that Cu-doping effectively improved electrical properties. The photoexcitation property also changed positively. The energy required for electrons to transition from cage conduction band to frame conduction band showed a decreasing trend, from 2.23 to 1.48 eV. The first-principle calculation showed an upward shift in the Fermi energy level position of C12A7: e(-). In addition, Cu atoms provided more density of states near the Fermi energy level. The number of empty orbitals near the Fermi surface of (Ca1-xCux) 12A7: e(-) that can receive excited electrons increased. It provided a theoretical basis for preparing (Ca1-xCux) 12A7: e(-) with high electrical transport characteristics.
Keyword ：
electrical properties electrical properties first-principles first-principles functional ceramic functional ceramic e(-) e(-)
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Liu, Fei , Zhang, Xin , Yin, Zhanqing et al. High electrical transport performance of C12A7: e(-) ceramics electrides on Cu-doping [J]. | JOURNAL OF THE AMERICAN CERAMIC SOCIETY , 2022 , 105 (6) : 4135-4142 . |
| MLA | Liu, Fei et al. "High electrical transport performance of C12A7: e(-) ceramics electrides on Cu-doping" . | JOURNAL OF THE AMERICAN CERAMIC SOCIETY 105 . 6 (2022) : 4135-4142 . |
| APA | Liu, Fei , Zhang, Xin , Yin, Zhanqing , Luo, Zhuang , Xiao, Yixin , Liu, Yanqin et al. High electrical transport performance of C12A7: e(-) ceramics electrides on Cu-doping . | JOURNAL OF THE AMERICAN CERAMIC SOCIETY , 2022 , 105 (6) , 4135-4142 . |
| Export to | NoteExpress RIS BibTex |
Abstract ：
[Ca24Al28O64](4+)(4e(-)) (C12A7:e(-)) has excellent potential in electric propulsion owing to various advantages, including low work function, low working temperature, and stable chemical properties. However, increasing electron concentration enhances the thermionic emission property of C12A7:e(-). This study used a chemical method-spark plasma sintering to synthesize Zr-doped C12A7:e(-) (C12(A(1 -) (x)Z(x))7:e(-), where x = 0 to 0.14). The study results show that C12(Al0.86Zr0.14)7:e(-) maximum injected electron concentration (n), conductivity (sigma), electron mobility (mu(n)), and zero-field emission current density (J(o)) improved to 2.4 x 10(21) /cm(3), 1507 S/cm, 5.2 cm(2)/V center dot s, and 2.4 A/cm(2), respectively. The emission current density of the C12(Al0.86Zr0.14)7:e(-) could be maintained at about 2.9 A/cm(2) under 1100 degrees C, 4000 V, and 600 min. Theoretical calculation results prove that Zr doping broadens the cage conduction band (CCB) of C12A7:e(-) and reduces the bandgap between the CCB and the frame conduction band. In addition, Zr doping increases the electronic density of states near the Fermi level, and the density of states presents a continuous state. This helps to increase the injected electron concentration and enhance the electrical transport and thermionic emission characteristics of the sample. The calculation results provide theoretical support for the experiment.
Keyword ：
injected electron concentration injected electron concentration e(-) e(-) thermionic emission properties thermionic emission properties first-principles calculations first-principles calculations
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Luo, Zhuang , Zhang, Xin , Xiao, Yixin et al. Enhancing the injected electron concentration and thermionic emission property in C12A7:e(-) ceramic via Al site Zr doping [J]. | JOURNAL OF THE AMERICAN CERAMIC SOCIETY , 2022 , 105 (12) : 7355-7365 . |
| MLA | Luo, Zhuang et al. "Enhancing the injected electron concentration and thermionic emission property in C12A7:e(-) ceramic via Al site Zr doping" . | JOURNAL OF THE AMERICAN CERAMIC SOCIETY 105 . 12 (2022) : 7355-7365 . |
| APA | Luo, Zhuang , Zhang, Xin , Xiao, Yixin , Liu, Weikang , Han, Shangru , Ju, Shanshan et al. Enhancing the injected electron concentration and thermionic emission property in C12A7:e(-) ceramic via Al site Zr doping . | JOURNAL OF THE AMERICAN CERAMIC SOCIETY , 2022 , 105 (12) , 7355-7365 . |
| Export to | NoteExpress RIS BibTex |
Abstract ：
Single-crystal lanthanum hexaboride (LaB6) is a functional ceramic with a low work function, strong resistance to ion bombardment, reasonable conductivity, and low evaporation rate. This study explored the use of a femtosecond laser combined with electrochemical etching to prepare a microtips array on the (100) crystal plane of a single-crystal LaB6 ceramic. The ablation threshold of single-crystal LaB6, processed using a femtosecond laser, was studied in addition to the microstructure and field emission properties of the sample. The study results proved that selecting a peak laser fluence F-0 of 9.9 J/cm(2) could help avoid the thermal ablation of the microtips array. The phase, crystal structure, and elemental composition of the microtips array on the single-crystal LaB6 were unchanged. The prepared microtips array of a field emitter had a curvature radius, height, and minimum spacing of 0.4, 8, and 20 mu m, respectively. The field emission test results showed that the starting electric field strength and field-emission current density were 2.45 V/mu m and 2.07 A/cm(2), respectively, when the applied electric field strength was 5.2 V/mu m. In addition, the field enhancement factor was 1493, indicating an excellent field emission stability.
Keyword ：
functional ceramic functional ceramic femtosecond laser femtosecond laser microtips array microtips array electrochemical etching electrochemical etching single-crystal lanthanum hexaboride (LaB6) single-crystal lanthanum hexaboride (LaB6)
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Zhou, Ning , Zhang, Xin , Zhang, Wei et al. Controllable preparation of microtips array on (100) crystal plane of single-crystal lanthanum hexaboride ceramic [J]. | JOURNAL OF THE AMERICAN CERAMIC SOCIETY , 2021 , 105 (3) : 1896-1903 . |
| MLA | Zhou, Ning et al. "Controllable preparation of microtips array on (100) crystal plane of single-crystal lanthanum hexaboride ceramic" . | JOURNAL OF THE AMERICAN CERAMIC SOCIETY 105 . 3 (2021) : 1896-1903 . |
| APA | Zhou, Ning , Zhang, Xin , Zhang, Wei , Liu, Hongliang , Li, Yuancheng , Liu, Yanqin et al. Controllable preparation of microtips array on (100) crystal plane of single-crystal lanthanum hexaboride ceramic . | JOURNAL OF THE AMERICAN CERAMIC SOCIETY , 2021 , 105 (3) , 1896-1903 . |
| Export to | NoteExpress RIS BibTex |
Abstract ：
Sr-doped single crystals (C1-xSx)12A7:e(-) (x = 0, 0.01, 0.02, 0.03) were successfully fabricated by floating zone method. It is found that Sr-doping decreases the reduction time from 30 h to 20 h. The maximum emission current of (C1-xSx)12A7:e(-) is greatly improved by 50% than that of the un-doped. The DFT calculations show Sr-doping in C12A7 contributed to the free O2- in the cages spread out, leading to a short reduction time; increase the "window" between two adjacent cages that is conducive to the electrons in cages to escape. And the work function of the (C1-xSx)12A7:e(-) is lower than that of C12A7:e(-).
Keyword ：
Thermionic emission properties Thermionic emission properties Electrical properties Electrical properties Floating zone method Floating zone method Single crystal (C1-xSx)12A7:e(-) Single crystal (C1-xSx)12A7:e(-)
Cite：
Copy from the list or Export to your reference management。
| GB/T 7714 | Zhang, Xin , Feng, Qi , Zhao, Jiping et al. Sr-doping enhanced electrical transport and thermionic emission of single crystal 12CaO center dot 7Al(2)O(3) electride [J]. | CURRENT APPLIED PHYSICS , 2020 , 20 (1) : 96-101 . |
| MLA | Zhang, Xin et al. "Sr-doping enhanced electrical transport and thermionic emission of single crystal 12CaO center dot 7Al(2)O(3) electride" . | CURRENT APPLIED PHYSICS 20 . 1 (2020) : 96-101 . |
| APA | Zhang, Xin , Feng, Qi , Zhao, Jiping , Liu, Hongliang , Li, Jichao , Xiao, Yixin et al. Sr-doping enhanced electrical transport and thermionic emission of single crystal 12CaO center dot 7Al(2)O(3) electride . | CURRENT APPLIED PHYSICS , 2020 , 20 (1) , 96-101 . |
| Export to | NoteExpress RIS BibTex |
Export
| Results： |
Selected to |
| Format： |
