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Realizing translucency in aluminosilicate glass at ultralow temperature via cold sintering process

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Journal of Advanced Ceramics 2022年第11期11卷 1714-1724页

作者： jie GAO Kangjing WANG wei LUO Xiaowei CHENG Yuchi FAN Wan JIANG State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Institute of Functional MaterialsCollege of Materials Science and EngineeringDonghua UniversityShanghai 201620China Department of Chemistry Fudan UniversityShanghai 200438China

Glass with high visible-light transparency is widely considered as the most important optical material,which typically requires a processing temperature higher than 1000℃.Here,we report a translucent aluminosilicate glass that can be prepared by cold sintering process(CSP)at merely 300℃.After eliminating structural pores in hexagonal faujasite(EMT)-type zeolite by heat treatment,the obtained highly active nanoparticles are consolidated to have nearly full density by adding NaOH solution as liquid ***,direct densification of EMT powder cannot remove the structural pores of zeolite completely,leading to an opaque compact after the *** is proved that the chemical reaction between the NaOH-and zeolite-derived powders is highly beneficial to dissolution–precipitation process during sintering,leading to the ultra-low activation energy of 27.13 kJ/*** the addition of 5 M NaOH solution greatly promotes the densification via the reaction with aluminosilicate powder,lower or higher concentration of solvent can deteriorate the transmittance of ***,the CSP-prepared glass exhibits a Vickers hardness of 4.3 GPa,reaching 60%of the reported value for spark plasma sintering(SPS)-prepared sample.

关键词： glass cold sintering process(CSP) optical properties mechanical properties

中华鳖源按蚊伊丽莎白菌的分离鉴定及药敏特性研究

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水生生物学报 2024年第4期48卷 683-693页

作者：王玉柱蒋巍巍刘文舒路晶晶唐艳强肖海红郭小泽李思明江西省农业科学院畜牧兽医研究所南昌330200 四川农业大学动物科技学院成都611130

研究对从江西省抚州市南丰县某中华鳖养殖基地患病中华鳖(Trionyx sinensis)组织中分离培养得到的一株按蚊伊丽莎白菌(Elizabethkingia anophelis)疑似菌株进行鉴定和药敏特性研究。在无菌环境中解剖患病中华鳖得到肝脏、脾脏组织,匀浆... 详细信息

研究对从江西省抚州市南丰县某中华鳖养殖基地患病中华鳖(Trionyx sinensis)组织中分离培养得到的一株按蚊伊丽莎白菌(Elizabethkingia anophelis)疑似菌株进行鉴定和药敏特性研究。在无菌环境中解剖患病中华鳖得到肝脏、脾脏组织,匀浆后接种在LB培养基上,分离得到优势菌株EJX2021。对该菌株进行形态学观察、16S RNA基因序列测定和生理生化鉴定以鉴定菌株种类;进行人工回归感染、组织病理学观察、毒力因子分析和抗生素药物敏感性试验研究其致病能力和药物敏感性特征。从患病中华鳖中分离出一株优势菌株EJX2021,结合其表型特征、16S RNA基因序列测定和生理生化鉴定,确定其为按蚊伊丽莎白菌。在人工回归感染后,该菌株对中华鳖15d的LD50为1.62×10^(8)CFU/mL,95%置信区间为(0.78—3.37)×10^(8)CFU/mL;组织病理学观察肠道、肺脏、脾脏、肝脏等组织出现不同程度病变。毒力因子分析显示该菌株包含246个潜在毒力基因。药物敏感性试验显示该菌株为多重耐药菌株,对多西环素、米诺环素、卡那霉素、哌拉西林、恩诺沙星、氟苯尼考敏感,对头孢曲松、头孢哌酮中度敏感,对新霉素等15种抗生素具有耐药性。研究证明了按蚊伊丽莎白菌是能够导致中华鳖病害的一种病原菌,为该细菌导致中华鳖病害的检测、鉴别和防治提供科学依据。

关键词：按蚊伊丽莎白菌分离鉴定药敏特性中华鳖

Fracture Behavior of Cold Sprayed 304 Stainless Steel Coating During Cold Rolling

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Journal of Iron and Steel Research International 2012年第11期19卷 57-63页

作者： MENG Xian-ming ZHANG Jun-bao HAN wei ZHAO jie School of Materials Science and Engineering Dalian University of Technology Dalian 116024 LiaoningChina Baosteel Research Institute Baoshan Iron and Steel Co Ltd Shanghai 201900 China

The fracture behavior of cold sprayed 304 stainless steel coating in cold rolling process was studied. The 304 stainless steel coatings were deposited on low carbon steel substrate by cold gas dynamic spray （CGDS） and then cold rolled, respectively. The fracture morphology of the coatings was observed and analyzed, and the crack distri- butions along the longitudinal rolling direction of the coatings were also investigated and discussed. The results showed that the cohesive strength of the cold sprayed 304 stainless steel coating was too low to be cold rolled. Mi crocracks were formed in the as-sprayed coatings and ran perpendicularly to the rolling direction. The spacing dis- tance between these cracks decreased with the increase of the cold rolling reduction. In addition, it was also found that the initial crack generated at the surface of the coating and propagated from the surface to the interface along the weakly bonded particles. A theoretical analysis was developed for the coating fracture. It gave a critical minimum cohesive bonding strength of the coating for non-breaking in cold rolling process. The crack propagation manner of the cold rolled coatings was also discussed.

关键词： fracture cold spraying cold rolling 304 stainless steel coating microstructure

Blue light-emitting polyfluorenes containing dibenzothiophene-S,S-dioxide unit in alkyl side chain

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Science China Chemistry 2017年第10期60卷 1356-1366页

作者： Yiwen Fang jie Liu Yuhao Zhang Ting Guo Fei Huang wei Yang Yong Cao Institute of Polymer Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and Devices South China University of Technology Guangzhou 510640 China

Blue light-emitting polyfluorenes containing dibenzothiophene-S,S-dioxide(SO) unit in alkyl side chain(PF-FSOs and PF-CzSOs) were synthesized. All the polymers show high thermal stability with the decomposition temperatures over400 °C. The highest occupied molecular orbital(HOMO) and the lowest unoccupied molecular orbital(LUMO) energy levels of the copolymer slightly decrease with the increase of SO content in side chain. PL spectra of the polymers show slightly red shift and broadening with the increase of solvent polarities, indicating unremarkable intramolecular charge transfer(ICT) effect in the polymers containing SO unit in alkyl side chain. EL spectra of the polymers are almost unchanged in the current densities from 100 to 400 mA cm.2, indicating the superb EL stability of the resulted polymers. The EL spectra of the copolymers exhibit obvious blue-shift and narrowing with the CIE of(0.18, 0.11) for PF-FSO10 and(0.17, 0.11) for PF-CzSO10, respectively,compared with PF-SO10 containing SO unit in main chain with the CIE of(0.16, 0.17) and PFO with the CIE of(0.18, 0.18).The superior device performances were obtained with the luminous efficiency(LEmax) of 1.17 and 0.68 cd A.1 for PF-FSO15 and PF-CzSO20, respectively, compared with the LEmax of 0.37 cd A.1 for PFO. The results indicate that linking SO unit to alkyl side chain of the polyfluorene is a promising strategy for efficient blue light-emitting polymers.

关键词： dibenzothiophene-S S-dioxide alkyl side chain polyfluorene blue emission polymer light-emitting diode(PLED)

Magnetic, Photoluminescent and Semiconductive Properties of a Novel 4f-5d Bromide Compound(La6Hg5Br26)[4(HgBr2)](2Br)

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Chinese Journal of Structural Chemistry 2020年第1期39卷 154-163,5页

作者： LIN wei-Sheng CHEN wen-Tong Department of Ecological and Resources Engineering Fujian Key Laboratory of Eco-industrial Green TechnologyWuyi UniversityWuyishan 354300China Institute of Applied Chemistry School of Chemistry and Chemical EngineeringJiangxi Province Key Laboratory of CoordinationChemistryJinggangshan UniversityJi’an 343009China State Key Laboratory of Structural Chemistry Fujian Institute of Researchon the Structure of MatterChinese Academy of SciencesFuzhou 350002China

An unprecedented 4f-5d material(La6Hg5Br26)[4(HgBr2)](2Br)(1)was syn-thesized by hydrothermal reactions and structurally characterized by single-crystal X-ray diffraction *** 1 crystallizes in the Pbam space group of orthorhombic system with a=13.0980(10),b=13.6650(9),c=28.010(2)?,V=5013.4(6)?^3,Br36Hg9La6,Mr=5515.53,Z=2,Dc=3.613 g/cm^3,μ(MoKα)=29.457 mm^–1 and F(000)=*** 1 is characteristic of a two-dimensional(2D)layered *** photoluminescent measurements with solid-state samples reveal that compound 1 has a strong emission in the green region of light *** has remarkable CIE chromaticity coordinates of(0.2499,0.3589).A wide optical band gap of 3.41 eV is discovered by the solid-state UV/vis diffuse reflectance *** variable-temperature magnetic susceptibility obeys the Curie-weiss law(cm=c/(T–q))with C=2.48 K and a negative weiss constantθ=–169.07 K as revealed by the magnetic measurements,indicating the existence of an antiferromagnetic interaction in compound 1.

关键词： lanthanide mercury magnetism photoluminescence semiconductor

Constitutive equation and hot processing maps of Al-5Ti-1B master alloy

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Rare Metals 2018年第8期37卷 668-674页

作者： Fu-wei Kang jie Zhou Zhi-wei Wang Xue-Min Zhang Yi-Cheng Feng Er-Jun Guo School of Materials Science and Engineering Harbin Universityof Science and Technology Harbin 150040 China Harbin Dong An Engine Group Corporation Ltd. Aviation Industry Corporation of China Harbin 150066 China

The isothermal compression tests of A1-5Ti- 1B master alloy were conducted on the thermal mechanical simulator Gleeble-1500D at the deformation temperature range of 300-450 ℃,the strain rate range of 0.01- 10.00 s^-l, and the engineering strain of 50 %. The effects of deformation temperatures and strain rates on the flow stress were analyzed by the true stress-true strain curves. The result indicates that the flow stress increases with the increase of strain rate, while it decreases with the increase of temperature. The hot deformation activation energy of A1-5Ti-IB master alloy is calculated to be 250.9 ***^-1, and the constitutive equation is established as ε=1.97 x lO^19[sinh（O.O15δ）^11.14exp（-250.9/RT）, and the validity of this constitutive equation is verified. Based on dynamic material model （DMM） criterion, the hot processing map of AI-5Ti-1B master alloy is obtained. The optimum hot extrusion conditions are determined as deformation temperature of 400℃ and strain rate of 1.00 s^-1, and the flow instability only appears at the temperature range of 300-340℃ at the base of the hot processing map.

关键词： Al-5Ti-1B master alloy Flow stress Constitutive equation Hot processing map

Characteristics of Tropical Sea Surface Temperature Anomalies and Their Influences on the Onset of South China Sea Summer Monsoon

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Atmospheric and Oceanic Science Letters 2013年第5期6卷 266-272页

作者： LIANG jie-Yi wen Zhi-Ping CHEN jie-Peng and WU Li-Ji Center for Monsoon and Environment Research/Department of Atmospheric Sciences Sun Yat-Sen University College of Agriculture South China Agricultural University

The characteristics of sea surface temperature anomalies （SSTAs） in the tropical oceans and their influences on the onset of South China Sea summer monsoon （SCSSM） have been *** anomaly of SST in tropical Pacific Ocean exerts persistence impact for one to three months on atmospheric *** the warm pool becomes anomalously warmer during an earlier period from February to April,the SCSSM breaks out earlier,and vice *** value decomposition （SVD） and composite analysis have shown that,in La Ni（n）a pattern,the convection over Western Pacific will occur earlier and be stronger than normal,which favors the convergence at a lower layer over Western Pacific,as well as the strengthening of upwelling branch of Walker circulation,leading to an earlier burst of westerly in the southern South China ***,the convection in Sumatra appears earlier than normal and favors the westerly evolution in eastern Indian Ocean,resulting in the splitting of the subtropical high belt and an early onset of ***,the atmospheric circulation anomaly is reversed in El Ni（n）o pattern.

关键词： onset of South China Sea summer monsoon tropical pacific ocean sea surface temperature anomalies

基于多学科团队合作的延续性干预对脊髓肿瘤术后患者功能康复与生活质量的影响

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河北医药 2024年第11期46卷 1690-1693页

作者：邢淼于丽魏婕刘乐胡杰祝平北京天坛医院神经外科北京市100050

目的分析基于多学科团队合作的延续性干预对脊髓肿瘤术后患者功能康复与生活质量的影响。方法采取便利抽样的方法选取2021年1月至2023年1月北京天坛医院收取的92例脊髓肿瘤术后患者,根据数字随机表法分作2组,每组46例。对照组予以常规... 详细信息

目的分析基于多学科团队合作的延续性干预对脊髓肿瘤术后患者功能康复与生活质量的影响。方法采取便利抽样的方法选取2021年1月至2023年1月北京天坛医院收取的92例脊髓肿瘤术后患者,根据数字随机表法分作2组,每组46例。对照组予以常规延续护理,观察组予以基于多学科团队合作的延续性干预,3个月后比较2组患者功能康复效果、机体康复水平、病耻感及生活质量。结果护理后,观察组患者功能康复优良率65.22%,高于对照组的43.48%(P<0.05);观察组患者体能量表(ECOG)评分(1.41±0.13)分,长海痛尺评分(3.38±1.19)分,低于对照组的(1.71±0.15)分与(4.01±1.27)分(P<0.05);观察组患者慢性疾病病耻感量表(SSCI)评分(84.20±7.45)分,低于对照组的(91.48±7.91)分(P<0.05);观察组健康生活量表简表(SF-36)分数显著高于对照组(P<0.05)。结论基于多学科团队合作的延续性干预在脊髓肿瘤术后患者中的应用可取得显著效果,不仅能提高其功能康复效果及机体康复水平,而且还可降低患者的病耻感,促进其生活质量进一步提高。

关键词：多学科团队合作延续性干预脊髓肿瘤功能康复生活质量

Null geodesics,quasinormal modes,and thermodynamic phase transition for charged black holes in asymptotically flat and dS spacetimes

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Chinese Physics C 2020年第11期44卷 220-231页

作者： Shao-wen wei Yu-Xiao Liu Institute of Theoretical Physics&Research Center of Gravitation Lanzhou UniversityLanzhou 730000China Department of Physics and Astronomy University of WaterlooWaterlooOntarioN2L 3G1Canada

A numerical study has indicated that there exists a relation between the quasinormal modes and the Davies point for a black *** this paper,we analytically study this relation for charged Reissner-Nordstrom black holes in asymptotically flat and de Sitter(dS)spacetimes in the eikonal limit,under which the quasinormal modes can be obtained from the null geodesics using the angular velocity Ω and the Lyapunov exponentλof the photon *** in asymptotically flat and dS spacetimes,we observe spiral-like shapes in the complex quasinormal mode ***,the starting point of the shapes does not coincide with the Davies ***,we find a new relation in which the Davies point exactly meets the maximum temperature T in the T-Ω and T-λ *** a higher-dimensional asymptotically flat spacetime,although there is no spiral-like shape,such a relation still ***,we provide a new relation between black hole thermodynamics and dynamics in the eikonal *** this relation,we can test the thermodynamic property of a black hole using the quasinormal modes.

关键词： black holes phase transition photon sphere