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环境湿度对1–3型水泥基压电复合材料性能的影响

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硅酸盐学报 2006年第5期34卷 626-629,635页

作者：程新黄世峰胡雅莉王守德济南大学材料学院济南250022

用切割–填充法,以硫铝酸盐水泥为基体,铌镁锆钛酸铅[Pb(Mg1/3Nb2/3)O3·PbTiO3·PbZrO3](PMN)为压电功能体制备了1–3型硫铝酸盐水泥基压电复合材料。研究了环境湿度对1–3型水泥基压电复合材料的压电性能和介电性能的影响。结果表明:... 详细信息

用切割–填充法,以硫铝酸盐水泥为基体,铌镁锆钛酸铅[Pb(Mg1/3Nb2/3)O3·PbTiO3·PbZrO3](PMN)为压电功能体制备了1–3型硫铝酸盐水泥基压电复合材料。研究了环境湿度对1–3型水泥基压电复合材料的压电性能和介电性能的影响。结果表明:随着相对湿度的增大,压电电压常数g33与机械品质因数Qm呈非线性减小。湿度对压电应变常数d33以及机电耦合系数Kp和Kt的影响较小。在低频和高频段,当相对湿度低于85%时,介电常数εr基本不受湿度的影响,表现出良好的介频稳定性。

关键词： 1-3型水泥基压电复合材料相对湿度压电性能介电性能机电耦合系数

基于遥感的1973—2015年武汉市湖泊水域面积动态监测与分析研究

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水利学报 2017年第8期48卷 903-913页

作者：马建威黄诗峰许宗男中国水利水电科学研究院北京100038 水利部防洪抗旱减灾工程技术研究中心北京100038

近年来,武汉市城市内涝频发,湖泊的减少被认为是导致其发生的重要原因。然而目前尚未有一个统一、科学的数据来表示整个武汉市湖泊的历史变迁。为了掌握近几十年武汉市湖泊的时空变化规律,基于多源遥感数据,采用归一化差异水体指数(NDWI... 详细信息

近年来,武汉市城市内涝频发,湖泊的减少被认为是导致其发生的重要原因。然而目前尚未有一个统一、科学的数据来表示整个武汉市湖泊的历史变迁。为了掌握近几十年武汉市湖泊的时空变化规律,基于多源遥感数据,采用归一化差异水体指数(NDWI)和面向对象分割结合的水体提取算法,对1973—2015年武汉市的湖泊分布进行了提取,并结合武汉市气象资料和统计年鉴对引起其变化的影响因素进行了分析。结果如下:(1)1973年,武汉市辖区内的湖泊水域面积为1170.84 km2,2015年为856.27 km2,42年间减少了314.57 km2,剧烈减少时期发生在1973—2005年,2005年以后,基本趋于稳定。(2)1973年武汉市中心城区湖泊水域面积为148.90 km2,1973年到1996年,湖泊水域面积基本趋于稳定,而在1996年之后,武汉市中心城区湖泊水域面积开始剧烈减少,2010年之后,武汉市中心城区的湖泊水域面积基本趋于稳定;2015年,武汉市中心城区湖泊水域面积为99.94km2,相对于1973年,减少了48.96 km2。(3)1973年到2015年,武汉市年降水量呈现略增加的趋势,年平均气温则有一定的增加趋势;而在1990年之后,武汉市人口的增加、城镇的快速发展及房地产开发导致了大量的湖泊被侵占;气候变化和人类活动共同导致了武汉市的湖泊水域面积减少,其中人类活动是其变化的主要因素。

关键词：武汉湖泊多源遥感数据时空变化人类活动

Preparation and acoustic properties of high-temperature acoustic emission sensor based on La_(3)Ga_(5)SiO_(14) crystal

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Journal of Advanced Dielectrics 2024年第1期14卷 25-32页

作者： Jingxiang Si Changhong Yang Rui Guo Yifan Wu Xiujuan Lin shifeng huang Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials University of Jinan Jinan 250022P.R.China

With the rapid development of modern industries,the high-temperature piezoelectric sensors that can work in extreme environments are in great *** this work,langasite(La_(3)Ga_(5)SiO_(14),LGS),as a high-temperature piezoelectric crystal with stable electro-elastic performance,is used as core element,and air and porous Al_(2)O_(3) are selected as backing layers respectively to prepare two kinds of high-temperature acoustic emission(AE)*** detection sensitivities at 25–500℃ are analyzed by the ball falling test and Hsu–Nielsen *** the condition of 25–500℃,the received amplitude signals by both sensors are maintained above 90 dB stimulated by the ZrO_(2) ceramic ball *** the Hsu–Nielsen experiment,as the temperature rising from 25℃ to 500℃,the signal amplitude of sensor with air backing layer decays from 447 mV to 365 mV,while the signal amplitude varies from 270 mV to 203 mV for the sensor with porous Al_(2)O_(3) backing ***,compared with the bandwidth of the air-backing sensor(37–183 kHz),the sensor with porous Al_(2)O_(3) backing layer broadens bandwidth to 28–273 *** results show that both these AE sensors have strong and stable response ability to AE signals at high-temperature of 500℃.Therefore,piezoelectric AE sensor based on LGS has great potential application in the ffeld of high-temperature structural health monitoring.

关键词： La_(3)Ga_(5)SiO_(14) acoustic emission sensor sensitivity structural health monitoring

Fabrication and Properties of 1-3 Polymer Modified Cement Based Piezoelectric Composites

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Fabrication and Properties of 1-3 Polymer Modified Cement Ba...

基于虚拟地理环境的数字孪生流域防洪应用技术探讨

The 1st International Congress on Advanced Materials 2011

作者： Mimi Li Min Sun shifeng huang Dongyu Xu Yamei Liu School of Material Science and Engineering University of Jinan

A piezoelectric ceramic(lead niobium lithium zirconate titanate, P(LN)ZT), sulphoaluminate cement and polymer were used to fabricate polymer modified cement based piezoelectric composites by cut-filling technique. The influence of P(LN)ZT volume fraction on the piezoelectric and dielectric properties of composite was investigated. The results show that as the P(LN)ZT volume fraction increase, thepiezoelectric strain factor d 33 , relative dielectric factor ε r and the acoustic impedance increase evidently, while the piezoelectric voltage factor g 33 and the dielectric loss tanδ decrease. Comparing with P(LN)ZT Piezoelectric ceramic, the vibration at thickness mode of 1-3 type piezoelectric composite is strengthened, and the electromechanical quality factor is reduced. When P(LN)ZT volume fraction is 30.86%, the acoustic impedance value is 8.24 M rayl, which is close to that of the concrete (9.0 M rayl), and this is suitable for the non destructive inspection.

关键词： 1-3 polymer modified cement based piezoelectric composite piezoelectric properties dielectric properties electromechanical properties acoustic impedance

来源： cnki会议评论

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遥感学报 2024年第5期28卷 1330-1339页

作者：李毅黄诗峰臧文斌高志国中国科学院空天信息创新研究院北京100094 中国水利水电科学研究院北京100038 天津城建大学地质与测绘学院天津300384

防洪是数字孪生流域的重要应用领域,数字孪生流域防洪应用不仅需要对流域中的自然要素进行科学表达,同时也需要对人类的活动特征进行描述。虚拟地理环境将自然要素与人文要素进行耦合研究,侧重于构建沉浸式的实验和认知环境,可以为数字... 详细信息

防洪是数字孪生流域的重要应用领域,数字孪生流域防洪应用不仅需要对流域中的自然要素进行科学表达,同时也需要对人类的活动特征进行描述。虚拟地理环境将自然要素与人文要素进行耦合研究,侧重于构建沉浸式的实验和认知环境,可以为数字孪生流域防洪中的人地关系建模以及洪水场景表达与风险认知提供新视角和新方法。本文首先介绍数字孪生流域的概念、发展现状以及虚拟地理环境的特征,然后基于虚拟地理环境提出数字孪生流域防洪应用技术框架,阐述了数字化流域场景构建、数字流域状态同步、洪水时空过程建模与实验、人地关系建模、洪水场景表达与风险认知等关键技术,最后对数字孪生流域中的沉浸式VR/AR应用、公众参与防洪等未来的发展进行了展望。

关键词：遥感虚拟地理环境数字孪生流域洪水灾害增强现实元宇宙

Achieving both large piezoelectric constant and low dielectric loss in BiScO_(3)-PbTiO_(3)-Bi(Mn_(2/3)Sb_(1/3))O_(3)high-temperature piezoelectric ceramics

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Journal of Advanced Dielectrics 2022年第6期12卷 24-31页

作者： Yunyun Feng Changhong Yang Xiaoying Guo Wei Sun Wenxuan Wang Xiujuan Lin shifeng huang Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials University of Jinan Jinan 250022P.R.China

BiScO_(3)-PbTiO_(3)binary ceramics own both high Curie temperature and prominent piezoelectric properties,while the high dielectric loss needs to be reduced substantially for practical application especially at high *** this work,a ternary perovskite system of(1-x-y)BiScO3-yPbTiO3-xBi(Mn_(2/3)Sb_(1/3))O_(3)(BS-yPT-xBMS)with x=0.005,y=0.630-0.645 and x=0.015,y=0.625-0.640 was prepared by the traditional solid-state reaction *** phase structure,microstructure,dielectric/piezoelectric/ferroelectric properties were *** BS-yPT-xBMS ceramic series,the BS-0.630PT-0.015BMS at morphotropic phase boundary possesses the reduced dielectric loss factor(tanδ=1.20%)and increased mechanical quality factor(Qm=84),and maintains a high Curie temperature(TC=410°C)and excellent piezoelectric properties(d_(33)=330 pC/N)*** particular importance,at elevated temperature of 200°C,the value of tanδis only increased to 1.59%.All these properties indicate that the BS-0.630PT-0.015BMS ceramic has great potential for application in high-temperature piezoelectric devices.

关键词： High-temperature piezoelectric ceramics BiScO_(3)-PbTiO_(3) morphotropic phase boundary Bi(Mn_(2/3)Sb_(1/3))O_(3).

Large piezoelectric property of Bi(Fe_(0.93)Mn_(0.05)Ti_(0.02))O_(3) film by constructing internal bias electric field

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Journal of Advanced Dielectrics 2024年第4期14卷 63-70页

作者： Xiufang Yuan Mengjia Fan Wenxuan Wang Guoguo Wang Xiujuan Lin shifeng huang Changhong Yang Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials University of Jinan Jinan 250022P.R.China

BiFeO_(3)(BFO),Mn-doped-BFO(BFMO),Ti-doped-BFO(BFTO),and(Mn,Ti)-codoped-BFO(BFMTO)thin films are fabricated on the Pt/TiO_(2)/SiO_(2)/Si substrates via a sol–gel method combined with spin-coating and the subsequent layer-by-layer annealing *** with BFO film,the BFMTO film exhibits the lowest leakage current density(-10^(-4) A/cm^(2)@290 kV/cm).Notably,the polarization–electric field(P–E)loop of BFMTO film exhibits a positive displacement along the x-axis due to the existence of internal bias electric field,which is in agreement with the results of the PFM phase and amplitude ***,a very prominent inverse piezoelectric constant of d_(33)-160 pm/V was obtained,which overcomes other related thin *** internal bias electric field of BFMTO film can be caused by the different work functions of the thin film and the bottom electrode,accumulation of oxygen vacancies and the formation of defect ***,the internal bias electric field of BFMTO film has a good stability at the same electric field after experiencing the test cycle from low electric field to high electric field(400–1900 kV/cm).These results indicate that self-polarized BFMTO film can be integrated to devices without additional polarization process,and have a wide range of application in microelectromechanical systems.

关键词： Self-polarization bismuth ferrite film ion doping

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基于原位发泡工艺的固废基发泡陶瓷研究进展

硅酸盐学报 2022年第9期50卷 2510-2526页

作者：姜葱葱董祎然黄世峰程新山东省建筑材料制备与测试技术重点实验室济南大学济南250022

本工作着眼于绿色高附加值的发泡陶瓷产业,以消耗利用固废为前提,综述了利用原位发泡工艺制备发泡陶瓷的研究进展,并从固废原材料、发泡剂、添加剂、制备工艺及发泡陶瓷的性能与应用等方面展开了讨论。结合前期研究基础,揭示了发泡行为... 详细信息

本工作着眼于绿色高附加值的发泡陶瓷产业,以消耗利用固废为前提,综述了利用原位发泡工艺制备发泡陶瓷的研究进展,并从固废原材料、发泡剂、添加剂、制备工艺及发泡陶瓷的性能与应用等方面展开了讨论。结合前期研究基础,揭示了发泡行为与烧结过程的相互作用,提出了发泡陶瓷的原位成孔烧结机制,并对目前存在的问题及未来发展方向进行了总结,以期为纵深推动固废综合利用及发泡陶瓷的发展与应用提供参考。

关键词：发泡陶瓷原位发泡工艺固体废弃物发泡机理

Stable self-polarization in lead-free Bi(Fe_(0.93)Mn_(0.05)Ti_(0.02))O_(3)thick films

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Journal of Advanced Dielectrics 2022年第6期12卷 48-55页

作者： Mengjia Fan Xinyu Bu Wenxuan Wang Wei Sun Xiujuan Lin shifeng huang Changhong Yang Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials University of Jinan Jinan 250022P.R.China

The BiFeO3-based film is one of the most promising candidates for lead-free piezoelectric film *** this work,the 1μm-thick Bi(Fe_(0.93)Mn_(0.05)Ti_(0.02))O_(3)(BFMT)films are grown on the ITO/glass substrate using a sol-gel method combined with spin-coating and layer-by-layer annealing *** films display a large saturated polarization of 95μC/cm^(2),and a remanent polarization of 70μC/cm^(2).Especially,the films are self-poled caused by an internal bias field,giving rise to asymmetric polarization-electric field(P-E)loops with a positive shift along the x-axis.A stable self-polarization state is maintained during the applied electric field increasing to 1500 kV/cm and then decreasing *** weak dependence of P-E loops on frequency(1-50 kHz)and temperature(25-125°C)indicate that the internal bias field can be stable within a certain frequency and temperature *** results demonstrate that the self-polarized BFMT thick films can be integrated into devices without any poling process,with promising applications in micro-electro-mechanical systems.

关键词： Lead-free stable self-polarization bismuth ferrite thick films.