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Ultrahigh strain in textured BCZT-based lead-free ceramics with CuO sintering agent

Journal of Materials Science & Technology 2022年第22期117卷 207-214页

作者： Yingchun Liu Hongjun Zhang Wenming Shi qian Wang Guicheng jiang Bin Yang Wenwu Cao Jiubin Tan Functional Materials and Acoustooptic Instruments Institute School of Instrumentation Science and EngineeringHarbin Institute of TechnologyHarbin 150080China Department of Mathematics and Materials Research Institute The Pennsylvania State Ultra-precision Optical&Electronic Instrument Engineering Center Harbin Institute of TechnologyHarbin 150001China

Textured baTiO_(3)(BT)-based lead-free ceramics have gained significant attention due to their high piezoelectric coefficient(d)and very large field induced strain(S).However,costly nano-size raw materials,excessively high sintering temperature and low Curie temperature(T_(c))hinder their device *** this work,highly[001]_(c)-oriented(ba_(0.95)Ca_(0.05))(Zr_(0.04)Ti_(0.96))O_(3) ceramics with x mol%CuO(x=0.25,0.5,1.0,2.5)denoted as BCZT-x were synthesized by templated grain growth using micro-sized raw *** introduction of CuO sintering agent lowered the sintering temperature by 125℃ to 1450℃,and the BCZT-1.0 achieved a high texture degree of∼99%.In addition,the CuO-based liquid phases eliminated boundaries between BT templates and BCZT matrix *** liquid-phase sintering reduced sintering stresses,decreased the average grain size of BCZT-1.0 from 16μm down to 13μm,and increased the dielectric dispersion coefficientγto *** almost smoothed out T_(O-T) anomaly in the temperature dependence of dielectric permittivity and comparably high T_(c)(>102℃)lead to better temperature *** narrower grain orientation distribution with full width at half maximum(FWHM)of∼5.9°and smaller domains with the size of 0.1–0.5μm in width and 3–8μm in length were obtained,a high field induced maximum strain S_(max) of 0.38%and low H_(s) of 5.2%have been achieved in BCZT-1.0 textured ceramics together with a high and homogeneous piezoelectric stress coefficient d_(33)∼780 pC/N and very large d_(33)∗∼2950 pm/V.

关键词： Lead-free BCZT Textured ceramics Piezoelectric Strain hysteresis

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Investigation on Effects of Vertical Degree of Freedom on Gap Resonance Between Two Side-by-Side Boxes Under Wave Actions

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China Ocean Engineering 2022年第3期36卷 403-412页

作者： HE Zhi-wei GAO Jun-liang SHI Hua-bin ZANG Jun CHEN Hong-zhou LIU qian School of Naval Architecture and Ocean Engineering Jiangsu University of Science and TechnologyZhenjiang 212100China State Key Laboratory of Internet of Things for Smart City and Department of Civil and Environmental Engineering University of MacaoMacao 999078China Centre for Infrastructure Geotechnical and Water Engineering(IGWE)Department of Architecture and Civil Engi-neeringUniversity of BathBA27AYUK School of Civil Engineering and Architecture Northeast Electric Power UniversityJilin 132012China

The possible wave resonance in the narrow gap formed by the parallel arrangement of ships will lead to the sharp increase of wave loads and the rapid growth of motion *** fluid resonance inside a narrow gap between two side-by-side boxes is investigated numerically based on an open-source CFD package,*** upstream box remains fixed,while the downstream box is allowed to heave freely under wave *** work aims to examine the influence of the motion of the downstream box on the fluid resonant behaviors inside the *** hydrodynamic behaviors considered include the wave height inside the gap,the heave displacement,and the reflection,transmission,and energy loss *** et al.(2021)reported the influence of the motion of the upstream box on gap resonant *** comparative study,some results of Gao et al.(2021)are also presented in this *** is found that the heave motion of any box in the two-box system leads to a smaller resonant wave height amplification and a larger fluid resonance *** frequency at which the maximum heave displacement of the downstream box occurs is less than the fluid resonant *** heave motion of any box in the two-box system results in a larger reflection coefficient and a smaller energy loss coefficient.

关键词： gap resonance wave height amplification heave motion OpenFOAM

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Study on Transient Gap Resonance with Consideration of the Motion of Floating Body

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China Ocean Engineering 2022年第6期36卷 994-1006页

作者： GAO Jun-liang LYU Jing WANG Jing-hua ZHANG Jian LIU qian ZANG Jun ZOU Tao School of Naval Architecture and Ocean Engineering Jiangsu University of Science and TechnologyZhenjiang 212100China Key Laboratory of Port Waterway and Sedimentation Engineering of MOTNanjing Hydraulic Research InstituteNanjing 210029China Department of Civil and Environmental Engineering the Hong Kong Polytechnic UniversityHong KongChina Centre for Infrastructure Geotechnical and Water Engineering(IGWE)Department of Architecture and Civil EngineeringUniversity of BathBA27AYU.K Shandong Provincial Key Laboratory of Ocean Engineering Qingdao 266100China

In this paper, the transient fluid resonance phenomenon inside a narrow gap between two adjacent boxes excited by the incident focused waves with various spectral peak periods and focused wave amplitudes is simulated by utilizing the open-sourced computational fluid dynamics software, Open FOAM. The weather-side box is allowed to heave freely under the action of waves, and the lee-side box keeps fixed. This paper mainly focuses on how both the spectral peak period and the focused wave amplitude affect the free-surface amplification inside the gap, the motion of the weather-side box, and the wave loads(including the vertical and the horizontal wave forces) acting on both *** comparison, another two-box system with both boxes fixed is also considered as a control group. It is found that the motion of the weather-side box significantly changes the characteristics of the transient gap resonance, and it would cause that the fluid resonant period becomes 1.4-1.6 times that of the two-box system with both boxes *** the concerned physical quantities(i.e., the free-surface amplification in the gap, the motion of the weather-side box, the wave loads) are found to closely depend on both the spectral peak period and the focused wave amplitude.

关键词： transient gap resonance focused waves free-surface amplification wave loads heave motion OpenFOAM

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杵针对2型糖尿病周围神经病变患者血清炎性因子的影响研究

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实用医院临床杂志 2024年第5期21卷 114-118页

作者：贺千桔王寒王芳林洋王瑶成都中医药大学附属医院四川成都610072 四川省达州市中心医院四川达州635000 四川省广安市人民医院四川广安638000 成都市第二人民医院四川成都610017

目的观察杵针对2型糖尿病周围神经病变患者血清炎性因子白细胞介素(IL)-1β、IL-6、肿瘤坏死因子-α(TNF-α)的影响。方法将66例DPN患者按随机数字表法分为对照组与试验组各33例。对照组给予2型糖尿病周围神经病变常规治疗和护理,试验... 详细信息

目的观察杵针对2型糖尿病周围神经病变患者血清炎性因子白细胞介素(IL)-1β、IL-6、肿瘤坏死因子-α(TNF-α)的影响。方法将66例DPN患者按随机数字表法分为对照组与试验组各33例。对照组给予2型糖尿病周围神经病变常规治疗和护理,试验组在对照组基础上实施杵针治疗,杵针治疗部位为:命门八阵、至阳八阵、河车命强段、足三里、三阴交、合谷、阳陵泉,每天1次,1周5次,共4周。比较两组治疗前后血清IL-1β、IL-6、TNF-α、震动感觉阈值,临床症状积分及多伦多临床神经病变评分(TCSS)。结果治疗后,试验组IL-1β、IL-6、TNF-α、震动感觉阈值、临床症状积分、TCSS均较治疗前降低(P<0.05),且均低于对照组(P<0.05)。结论杵针疗法可有效降低2型糖尿病周围神经病变患者IL-1β、IL-6、TNF-α、VPT、CSIT、TCSS,抑制炎症反应,改善患者神经功能和临床症状。

关键词：杵针糖尿病周围神经病变炎性因子

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3-氨基-4-氧代氰基呋咱捕获与表征

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有机化学 2010年第3期30卷 444-448页

作者：罗义芬王伯周霍欢刘愆廉鹏西安近代化学研究所西安710065

3,4-双(4-氨基呋咱-3-基)氧化呋咱由活性中间体3-氨基-4-氧代氰基呋咱分子间发生二聚获得,但3-氨基-4-氧代氰基呋咱不稳定,无法通过分离、纯化及光谱鉴定证实其存在.采用4种不同的烯烃与3-氨基-4-氧代氰基呋咱发生1,3-偶极环加成反应得... 详细信息

3,4-双(4-氨基呋咱-3-基)氧化呋咱由活性中间体3-氨基-4-氧代氰基呋咱分子间发生二聚获得,但3-氨基-4-氧代氰基呋咱不稳定,无法通过分离、纯化及光谱鉴定证实其存在.采用4种不同的烯烃与3-氨基-4-氧代氰基呋咱发生1,3-偶极环加成反应得到3-(4-氨基呋咱-3-基)-5-氰基-Δ2-异噁唑啉、3-(4-氨基呋咱-3-基)-5-乙酰氧基-Δ2-异噁唑啉、3-(4-氨基呋咱-3-基)-5-正丁基-Δ2-异噁唑啉及3-(4-氨基呋咱-3-基)-环己烷并-Δ2-异噁唑啉4种Δ2-异噁唑啉衍生物;采用苯甲酰氯为捕获剂,与3-氨基-4-氧代氰基呋咱反应获得了3-氨基-4-(N-苯甲酸基氨基羰基)呋咱化合物;通过红外光谱、核磁共振光谱、质谱、元素分析表征了5种新化合物的结构,提供了活性中间体3-氨基-4-氧代氰基呋咱存在的间接证据.

关键词： 3-氨基-4-氧代氰基呋咱 1,3-偶极环加成捕获表征

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A Platform to Improve Echinococcosis Control in Tibetan Populations-Sichuan Province,China,2015‒2020

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China CDC weekly 2021年第5期3卷 94-97页

作者： Tian Tian Shuai Han Chuizhao Xue Xu Wang Shijie Yang Bo Zhong qian Wang Wenjie Yu Sha Liao Dan ba Ze Li Wei Li Fei Xie qiang Wang Zelin Zhu Yuwan Hao Weiping Wu Ning Xiao Xiao-nong Zhou National Institute of Parasitic Diseases Chinese Center for Disease Control and PreventionChinese Center for Tropical Diseases ResearchWHO Collaborating Centre for Tropical DiseasesNational Center for International Research on Tropical DiseasesMinistry of Science and TechnologyKey Laboratory of Parasite and Vector BiologyMinistry of HealthShanghaiChina Sichuan Center for Disease Control and Prevention ChengduSichuanChina Center for Disease Control and prevention of Ganzi Tibetan Autonomous Prefecture GanziSichuanChina Shiqu County Center for Disease Control and Prevention GanziSichuanChina

Echinococcosis is a neglected parasitic zoonotic disease that is distributed *** data has shown that China holds the highest disease burden of echinococcosis in the world,resulting in 22.97×10^(5) disability adjusted life year(DALYs)lost annually(1).Echinococcosis is one of the epidemiological factors responsible for poverty in *** 2000,China’s central government(CG)has taken several actions to control echinococcosis in Western *** 2005.

关键词： annually China Tibetan

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丹参花药组织培养研究

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河北农业科学 2024年第3期28卷 78-82页

作者：吴姣姣王倩齐琳琳刘灵娣姜涛钱荣温春秀万修福河北工程大学园林与生态工程学院河北邯郸056001 河北省农林科学院经济作物研究所/河北省药用植物工程技术研究中心河北石家庄050051 道地药材国家重点实验室北京100700

为了建立丹参花药培养再生体系,进行了丹参花药组织培养技术研究。以丹参花蕾为试验材料,研究了小孢子发育时期的确定方法,明确了小孢子处于单核靠边期的花蕾长度,结果显示,丹参花蕾长度为5.0~7.9 mm时小孢子处于单核靠边期。并利用小... 详细信息

为了建立丹参花药培养再生体系,进行了丹参花药组织培养技术研究。以丹参花蕾为试验材料,研究了小孢子发育时期的确定方法,明确了小孢子处于单核靠边期的花蕾长度,结果显示,丹参花蕾长度为5.0~7.9 mm时小孢子处于单核靠边期。并利用小孢子处于单核靠边期的花药做外植体,采用正交试验设计,分别比较了不同激素种类及配比对愈伤组织诱导和不定芽诱导的影响。结果显示,6-ba浓度为1.50 mg/L、2,4-D浓度为0.25 mg/L时,愈伤组织诱导率最高,达到83.33%,且愈伤组织长势较快,体积均匀,呈明显的颗粒状;6-ba浓度为1.25 mg/L、NAA浓度为0.05 mg/L、Iba浓度为0.25 mg/L时,不定芽诱导率最高且明显>其他处理,达到70.00%,且愈伤组织大部分呈鲜绿色,颗粒状明显,丛生苗较多,芽生长速度较快。丹参花蕾长度为5.0~7.9 mm时,小孢子处于单核靠边期,适合进行花药培养;适宜愈伤组织诱导的最佳培养基为MS+6-ba 1.50 mg/L+2,4-D 0.25 mg/L+糖30 g/L+琼脂6.5 g/L;适宜不定芽诱导的最佳培养基为MS+6-ba 1.25 mg/L+NAA 0.05 mg/L+Iba 0.25 mg/L+糖30 g/L+琼脂6.5 g/L。

关键词：丹参花药小孢子组织培养

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金川全尾砂–棒磨砂混合充填料胶砂强度与料浆流变特性研究

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岩石力学与工程学报 2014年第A02期33卷 3985-3991页

作者：杨志强高谦王永前陈得信把多恒北京科技大学金属矿山高效开采与安全教育部重点实验室北京100083 金川集团股份有限公司甘肃金昌737100

针对金川矿山棒磨砂充填料严重不足,开展全尾砂–棒磨砂混合充填料的胶砂试验研究。通过不同配比和料浆浓度的全尾砂–棒磨砂混合充填料的胶砂强度试验和料浆流变特性参数测试,获得充填体试块强度与混合料的配合比、平均粒径以及不均匀... 详细信息

针对金川矿山棒磨砂充填料严重不足,开展全尾砂–棒磨砂混合充填料的胶砂试验研究。通过不同配比和料浆浓度的全尾砂–棒磨砂混合充填料的胶砂强度试验和料浆流变特性参数测试,获得充填体试块强度与混合料的配合比、平均粒径以及不均匀性系数之间的关系,针对金川下向进路胶结充填法采矿,确定了满足充填体强度要求的全尾砂–棒磨砂的合理配比为3∶7。研究表明,混合充填料的7和28 d充填体强度和砂浆泌水率与沉降损失率,均优于纯棒磨砂充填料。该研究结果为金川矿山全尾砂工业化应用提供技术支撑,为金川全尾砂废弃物的资源化利用和环境保护奠定了基础。

关键词：采矿工程全尾砂–棒磨砂混合充填料合理配比抗压强度

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Multi-element B-site substituted perovskite ferroelectrics exhibit enhanced electrocaloric effect

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Science China(Technological Sciences) 2023年第4期66卷 1119-1128页

作者： DU FeiHong SONG ZhiWu XU YuTao HAN DongLin LI qiang ZHENG ShanYu SHEN JiaHe qian XiaoShi Interdisciplinary Research Centre School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai 200240China Zhejiang Research Institute of Chemical Industry Hangzhou 310023China

Electrocaloric(EC)refrigeration holds the promise to achieve next-generation refrigeration technology that can be efficiently powered by ***_(3)(BT)-based ferroelectric materials are attractive owing to their environmentally benign compositions,large polarization,and existing manufacturing method for multilayer ceramic capacitors(MLCC),which have stimulated intensive research efforts on these ***,we report an enhanced electrocaloric effect(ECE)and the refrigeration capacity of multi-element B-site substituted BT-based *** compositions of the proposed ba(Hf_(x)Sn_(x)Zr_(y))-Ti_(1-2x-y)O_(3)(BHSZT)ceramics were selected by fine-tuning each substituent against Titanium ions Ti^(4+),aiming to their respective morphotropic phase boundary(MPB).The BHSZT exhibited an ECE that is greater than that of the single-element substituted baTiO_(3) ceramics by at least 50%,reaching an adiabatic temperature change of above 1.7 K under 40 kV/***,the operating temperature window of the BHSZT ceramics is observed to cover the room temperature,which is a critical feature that allows the device implementation in our daily *** multi-element substitution improved the overall ECE performances,providing a high degree of freedom for polar reorientation and hence the large polar entropy that could be utilized by the external electric field.

关键词： ferroelectrics electrocalorics Ceramics

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四倍体资阳香橙快繁体系的建立研究

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陕西理工大学学报（自然科学版） 2024年第2期40卷 55-63页

作者：王倩蒋景龙秦公伟魏丽娜胡佳陕西理工大学生物科学与工程学院陕西汉中723000 陕西省资源生物重点实验室陕西汉中723000 陕西理工大学秦巴生物资源与生态环境省部共建国家重点实验室(培育) 陕西汉中723000

以四倍体资阳香橙幼芽和茎段为外植体,通过微扦插技术,对不同植物激素组合进行了优化,以期建立高效的快速繁殖体系。结果表明:以幼芽为外植体,添加1.0 mg/L 6-ba+0.1 mg/L KT的MT培养基,诱导芽效果最佳,45 d时诱导率高达91.67%,增殖系数... 详细信息

以四倍体资阳香橙幼芽和茎段为外植体,通过微扦插技术,对不同植物激素组合进行了优化,以期建立高效的快速繁殖体系。结果表明:以幼芽为外植体,添加1.0 mg/L 6-ba+0.1 mg/L KT的MT培养基,诱导芽效果最佳,45 d时诱导率高达91.67%,增殖系数为1.82;以茎段为外植体,添加1.0 mg/L 6-ba+1.0 mg/L KT的MT培养基,腋芽分化效果最佳,45 d时腋芽分化率为76.67%,增殖系数为1.22;而2.0 mg/L NAA+0.2%AC(活性炭)的1/2MT培养基,诱导生根的效果最佳,60 d时生根率达92.59%;对获得的46株组培苗进行移栽驯化,存活率为95.7%。经根尖染色体压片计数法鉴定,获得的组培苗均为四倍体资阳香橙。该研究建立了高效的四倍体资阳香橙无性繁殖体系,可为后续多倍体研究和生产实践提供材料。

关键词：四倍体资阳香橙生根率增殖系数驯化

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