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Enhanced strain and electrostrictive properties in lead-free BNT-based ceramics via rare earth doping

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Journal of Materiomics 2022年第2期8卷 401-407页

作者： anping deng Jiagang Wu Department of Materials Science Sichuan UniversityChengdu610064China

Bi_(0.5)Na_(0.5)TiO_(3)(BNT)-based ceramics are one of the most promising lead-free ferroelectrics due to their high strain *** to other chemical modifications,rare earth ions doping provides sig-nificant possibility to optimize the strain property of BNT-based *** this work,the effects of rare earth ions on phase structure,microstructure,and strain&electrostrictive properties of lead-free BNT-based ceramics were systematically *** earth ions(i.e.,La^(3+),Sm^(3+),Yb^(3+),Dy^(3+),and Nd ^(3+))were selected as the doping *** moderate La^(3+)ions can drive the ferroelectric state of BNT-based ceramics to nonergodic relaxor state or ergodic relaxor *** enhanced strain response of~0.40-0.42% and high converse piezoelectric coefficient of~600-630 pm/V can be achieved under 60-70 kV/cm for La^(3+)-doped ceramic with nonergodic relaxor ***,the giant electrostrictive coefficient Q 33 of~0.047 m 4/C 2 can be obtained for La ^(3+)-doped ceramic with ergodic relaxor *** rare earth ions also present the promotion effect on strain enhancement for BNT-based *** study affords a significant guidance to optimize strain and electrostrictive properties of BNT-based ce-ramics via rare earth ions doping.

关键词： BNT-based ceramics Rare earth doping Strain property Electrostrictive property Structure transition

准分子激光冠状动脉成形术联合药物涂层球囊治疗支架内再狭窄的即刻管腔获益及与光学相干断层成像下不同内膜组织特征间的关系

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中国循环杂志 2024年第2期39卷 133-139页

作者：何攀杨俊杰陈海威邓安平金至赓高磊郭军陈韵岱汪奇中国人民解放军总医院第一医学中心心血管内科北京100853 中国人民解放军医学院北京100853

目的:比较准分子激光冠状动脉成形术(ELCA)联合药物涂层球囊(DCB)治疗冠状动脉支架内再狭窄(ISR)的即刻管腔获益及与光学相干断层成像(OCT)下不同内膜组织特征间的关系。方法:回顾性入选2019年1月至2023年5月于中国人民解放军总医院第... 详细信息

目的:比较准分子激光冠状动脉成形术(ELCA)联合药物涂层球囊(DCB)治疗冠状动脉支架内再狭窄(ISR)的即刻管腔获益及与光学相干断层成像(OCT)下不同内膜组织特征间的关系。方法:回顾性入选2019年1月至2023年5月于中国人民解放军总医院第一医学中心接受DCB治疗的ISR患者86例,共96处ISR病变,所有病变均行OCT评估。根据是否使用ELCA,将病变分为ELCA+DCB组(n=30)和DCB组(n=66);并根据OCT评估的ISR病变内膜组织特征分为均质模式和非均质模式,比较两种不同模式对即刻管腔获益的影响。即刻管腔获益定义为治疗前后的OCT下最小管腔面积变化值(ΔMLA)。结果:ELCA+DCB组与DCB组相比获得更大的ΔMLA[(3.2±0.8)mm^(2)vs.(2.6±1.4)mm^(2),P=0.015]。在均质模式的ISR病变中,ELCA+DCB组的ΔMLA大于DCB组[(3.0±0.9)mm^(2)vs.(2.2±1.1)mm^(2),P=0.030],但在非均质模式的ISR病变中,两组ΔMLA差异无统计学意义[(3.4±0.7)mm^(2)vs.(3.2±1.5)mm^(2),P=0.533]。术后随访6个月期间,病变接受DCB治疗的患者(n=60)与ELCA+DCB治疗的患者(n=26)均无死亡,靶病变血运重建率差异无统计学意义(7.4%vs.4.2%,P>0.05)。结论:ELCA联合DCB是治疗ISR的有效策略,较单独DCB治疗能够实现更大的术后即刻管腔获益,尤其对于OCT显示病变内膜组织均质模式ISR的治疗效果更为显著。

关键词：支架内再狭窄准分子激光冠状动脉成形术药物涂层球囊光学相干断层成像

Effects of rare-earth dopants on phase structure and electrical properties of lead-free bismuth sodium titanate-based ceramics

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Journal of Materiomics 2020年第2期6卷 286-292页

作者： anping deng Jiagang Wu Department of Materials Science Sichuan UniversityChengdu610064China

In this work,the effects of rare earth(RE)dopants on the phase structure,microstructure,and electrical properties of lead-free bismuth sodium titanate(BNT)-based ceramics were *** earth elements(i.e.,Sm,Gd,Ho,Pr,Y,and Yb)were selected as the dopants to replace the Bi site of Bi_(0.5)(Na_(0.8)K_(0.2))0.5TiO_(3) *** was found that the addition of moderate RE ions reduced the temperature of ferroelectricrelaxor transition(T_(f-r))and the dielectric maximum at lower temperature,while the slight influence on the dielectric maximum at higher temperature and microstructure were ***,the threestage evolution of phase structure after introducing RE ions was confirmed.A high piezoelectric coefficient d_(33) of ~190 pC/N was achieved due to the improved dielectric constant in the state with stable electric field-induced ferroelectric *** high strain property and converse piezoelectric coefficient d_(33)* of ~340 pm/V were obtained in the state with the coexistence of nonergodic and ergodic relaxor phases when T_(f-r) approached room *** degenerated overall electromechanical properties exhibited in the state with complete ergodic relaxor *** study affords a significant guidance for optimizing the piezoelectricity of BNT-based ceramics utilizing rare earth dopants.

关键词： BNT-Based ceramics Rare earth doping Phase structure Electrical properties

Catalysis of organic pollutant photodegradation by metal phthalocyanines immobilized on TiO_2@SiO_2

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Chinese Science Bulletin 2011年第10期56卷 969-976页

作者： WANG ShuLian FANG YanFen YANG Yong LIU JunZi deng anping ZHAO XiaoRong HUANG YingPing Engineering Research Center of Eco-environment in Three Gorges Reservoir Region Ministry of Education China Three Gorges University Yichang 443002 China Shanghai Institute of Ceramics Chinese Academic of Sciences Shanghai 200050 China

A TiO2@SiO2 hybrid support was prepared by the sol-precipitation method using n-octylamine as a *** photocatalyst manganese phthalocyanine tetrasulfonic acid (MnPcS) was immobilized on the support to form MnPcS-TiO2@SiO2.X-ray diffraction (XRD) and UV-Visible diffuse reflectance spectra (UV-Vis DRS) were employed to characterize the *** photocatalytic degradation of rhodamine B (RhB) and the catalytic oxidation of o-phenylenediamine (OPDA) under visible light irradiation were used as probe *** mineralization efficiency and the degradation mechanism were evaluated using chemical oxygen demand (COD Cr) assays and electron spin resonance (ESR),*** was efficiently degraded by immobilized MnPcS-TiO2@SiO2 under visible light *** decolorization of RhB occurred after 240 min of irradiation and 64.02% COD Cr removal occurred after 24 h of *** results indicated that the oxidation process was dominated by the hydroxyl radical (·OH) and superoxide radical (O-·2) generated in the system.

关键词： TiO2 光降解催化剂有机污染物金属酞菁 SiO2 CODcr去除率可见光照射

Visible light-induced N-doped TiO_2 nanoparticles for the degradation of microcystin-LR

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Science China Chemistry 2010年第8期53卷 1793-1800,1833-1835页

作者： YANG Jing,CHEN dengXia,deng anping,FANG YanFen,LUO GuangFu,LI DeJiang,LI RuiPing & HUANG YingPing Alan G.MacDiarmid Research Institute of Renewable Energy,China Three Gorges University,Yichang 443000,China Alan G. MacDiarmid Research Institute of Renewable Energy China Three Gorges University Yichang China

N-doped nano-crystalline TiO2 powders have been synthesized by the sol-gel *** shape and crystal structure of the resulting N-doped TiO2 were investigated by X-ray Photoelectron Spectroscopy (XPS),X-ray spectroscopy (XRD),Transmission Electron Microscopy (TEM) and UV-vis reflection *** results showed that doping TiO2 with nitrogen can lower its band gap and apparently shift its optical response to the visible *** the visible light (λ> 420 nm) irradiation,the MC-LR was degraded by the synthesized N-TiO2 *** variation of MC-LR amount and its intermediates were detected by high performance liquid chromatography (HPLC) and LC-MS,*** mineralization of MC-LR was determined by total organic carbon (TOC) ***,transient oxidative species generated during photocatalysis were tracked by electron spin resonance (ESR) and Peroxidase *** these results indicated that visible-light excited N-TiO2 can activate molecular oxygen and thereby achieve degradation of MC-LR completely within 14 *** removal of 59% of TOC was achieved after 20 h *** major oxidative species in the system were hydroxyl radical (·OH) and H2O2.13 Kinds of intermediates were primarily identified in the *** on these results,a reasonable conclusion was drawn for the degradation of MC-LR wherein its four positions are easy to be attacked by the photo-generated OH radical followed by the hydrolyzation of peptides.

关键词： visible Light microcystin-LR N-doped titanium dioxide photocatalysis

酶联免疫吸附分析法测定土壤试样中的阿特拉津

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分析化学 1999年第6期27卷 657-660页

作者：邓安平,杨红,Franek Milan 华西医科大学卫生检测教研室华西医科大学实验化学教研室 Veterinary Research Institute Hudcova 70 621 Bmo 成都610041 Czech Republic

报道一种高灵敏度、高重现性的酶联免疫吸附分析法(ELLSA)对土壤试样中阿特拉津(Atrazine)的测定.测定的线性范围为 0.05～5.0μg/L,由14条标准曲线求得的最低检出限在0.018～0.24μg/L之间,线性相关系数r=0.9922.加标土样分别用含水甲... 详细信息

报道一种高灵敏度、高重现性的酶联免疫吸附分析法(ELLSA)对土壤试样中阿特拉津(Atrazine)的测定.测定的线性范围为 0.05～5.0μg/L,由14条标准曲线求得的最低检出限在0.018～0.24μg/L之间,线性相关系数r=0.9922.加标土样分别用含水甲醇和含水乙腈提取的效率都接近100%,提取液用重蒸水1:200稀释后可消除基质效应和溶剂效应的影响,加标平均回收率为99.6%.

关键词：阿特拉津酶联免疫吸附分析农药 s-三嗪土样提取环境分析

鄂西山区某县医院肺磨玻璃结节患者随访依从性的影响因素

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武汉大学学报（医学版） 2022年第5期43卷 842-847页

作者：向启均佟啟程万里邓安平朱铁源湖北省五峰土家族自治县人民医院外三科湖北五峰443400 武汉大学人民医院胸外科湖北武汉430060

目的:探讨影响肺磨玻璃结节患者随访依从性的相关因素,以期为后续建立山区群众肺结节综合管理与干预模式提供科学依据。方法:通过纳入2019年1月—2020年9月在湖北省五峰土家族自治县人民医院初次诊断为肺磨玻璃结节患者,调查门诊资料及... 详细信息

目的:探讨影响肺磨玻璃结节患者随访依从性的相关因素,以期为后续建立山区群众肺结节综合管理与干预模式提供科学依据。方法:通过纳入2019年1月—2020年9月在湖北省五峰土家族自治县人民医院初次诊断为肺磨玻璃结节患者,调查门诊资料及电话随访了解入组患者的肺结节复查情况,并分析患者随访依从性的影响因素。结果:共有192例肺磨玻璃结节患者纳入本研究,在确诊肺磨玻璃结节后的12~33个月中,仅31.8%(61/192)的患者进行了门诊随诊。通过单因素及多因素回归分析,得出是否专科门诊、经济情况及住址离医院距离是影响患者进行门诊肺磨玻璃结节随诊的重要因素。结论:鄂西山区肺磨玻璃结节患者的门诊随访比例较低,开设肺结节门诊及重点关注偏远贫困患者可能可以改善山区肺磨玻璃结节患者的随访依从情况。

关键词：肺磨玻璃结节随访专科门诊依从性

湘南黄沙坪铜锡多金属矿床与隐伏花岗斑岩有关的矿化-蚀变分带模式

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中国地质 2023年第2期50卷 586-604页

作者：陶琴韩润生赵冻吴鹏田旭峰赵太成杨航宗志宏邓安平昆明理工大学国土资源工程学院云南昆明650093 有色金属矿产地质调查中心西南地质调查所云南昆明650093 湖南省湘南地质勘察院湖南郴州423000 湖南有色黄沙坪矿业有限公司湖南郴州424421

【研究目的】黄沙坪铜锡多金属矿床是湘南地区岩浆热液成矿系统的典型矿床之一。为了深化研究该矿床成岩成矿机制、高效指导深部找矿勘查,需要揭示与隐伏花岗斑岩有关的多金属矿化-蚀变分带规律,构建深部矿化-蚀变空间分带模式。【研究... 详细信息

【研究目的】黄沙坪铜锡多金属矿床是湘南地区岩浆热液成矿系统的典型矿床之一。为了深化研究该矿床成岩成矿机制、高效指导深部找矿勘查,需要揭示与隐伏花岗斑岩有关的多金属矿化-蚀变分带规律,构建深部矿化-蚀变空间分带模式。【研究方法】应用热液矿床的大比例尺蚀变岩相定位找矿预测方法,开展矿区内-136 m、-176 m、-256 m中段典型穿脉剖面的矿化蚀变测量和矿物岩石地球化学研究,剖析了矿化-蚀变的强弱变化、矿物共生组合及其空间分带特征,探讨了成矿元素、元素组合及其元素比值变化规律。【研究结果】构建了矿化-蚀变空间分带模式:从花岗斑岩体(内带)→接触带→围岩(外带),依次为钨钼(黄铁)矿化-硅化-绢云母化花岗斑岩带(Ⅰ)→磁铁(钨锡)矿化石榴石矽卡岩带(Ⅱ-1)→钨钼-磁黄铁矿化石榴石矽卡岩带(Ⅱ-2)→铅锌矿化结晶灰岩带(Ⅲ)→强方解石化灰岩带(Ⅳ)的分带规律,各带对应的主要矿物组合为:石英+(黄铁矿+绢云母)→磁铁矿+透辉石+硅灰石+绿帘石+绿泥石+(白钨矿+锡石+黄铁矿+石榴石)→白钨矿+辉钼矿+磁黄铁矿+(锡石+黄铜矿+黄铁矿+闪锌矿+方铅矿)+石榴石+符山石+透辉石+角闪石+萤石+绿帘石+绿泥石+(石英+方解石)→方铅矿+闪锌矿+(黄铁矿)+方解石+石英→方解石+石英。进一步揭示了各蚀变带矿化元素分布规律:W、Mo→Fe、W、Sn(Bi、Mo)→W、Sn、Bi、Mo(Cu)→Pb、Zn(W、Sn、Cu)→Pb、Zn、Ag的水平分带规律。【结论】黄沙坪铜锡多金属矿床以岩体为中心至两侧围岩矿化-蚀变分带规律明显,各带内特征矿物组合和矿化指示元素的变化规律对矿体的赋存空间具有明显的指示作用。

关键词：矿化-蚀变空间分带岩浆热液成矿系统元素空间变化规律黄沙坪铜锡多金属矿床矿产勘查工程湘南地区

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基于正交分析的含缺陷连续管冲蚀磨损研究

中国工程机械学报 2024年第2期22卷 174-178页

作者：王利锋邓又银张益维钱利霞纪安平重庆三峡学院机械工程学院重庆404020 智能光电系统感知及应用四川省高校重点实验室四川达州635000

含缺陷连续管在继续使用中易造成其冲蚀磨损加剧,因此结合实际工况建立了含缺陷连续管的冲蚀磨损数值模型,并借助已有实验数据对构建模型进行验证。为深入研究缺陷参数对连续管冲蚀磨损的显著性影响,将正交试验方法引入连续管冲蚀磨损... 详细信息

含缺陷连续管在继续使用中易造成其冲蚀磨损加剧,因此结合实际工况建立了含缺陷连续管的冲蚀磨损数值模型,并借助已有实验数据对构建模型进行验证。为深入研究缺陷参数对连续管冲蚀磨损的显著性影响,将正交试验方法引入连续管冲蚀磨损研究分析中。研究表明:当连续管内壁轻微缺陷个数较多但分布不集中时,此类缺陷对连续管的正常使用影响较小;当连续管内壁轻微缺陷个数较多且分布较为集中时,易形成连片缺陷,此类缺陷对多连续管的冲蚀磨损加剧有重大影响;当连续管内壁轻微缺陷个数较少但缺陷较长或较深时,此类缺陷易造成连续管局部冲蚀磨损加剧。

关键词：含缺陷连续管冲蚀磨损数值模拟正交分析