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Greatly enhanced electro-optic modulation efficiency in titanium in-diffusion PIN-PMN-PT waveguide

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Journal of Advanced Ceramics 2023年第7期12卷 1454-1462页

作者： Qingyuan Hu Yuebin Zhang Huimin Liao Xin Liu Pengfei Li Yali Feng Lei An yongyong zhuang Zhuo Xu Xiaoyong Wei Electronic Materials Research Laboratory Key Laboratory of the Ministry of Education&International Center for Dielectric ResearchSchool of Electronic Science and EngineeringXi'an Jiaotong UniversityXi'an 710049China

Electro-optic modulators,which convert electrical signals onto the transmission light,are key devices in electro-optic modulating *** efficiency is one of the most important parameters of an electro-optic modulator,which directly determines the footprint and power consumption of the ***,modulation efficiency strongly depends on the electro-optic response of the *** Pb(In_(1/2)Nb_(1/2))O_(3)-Pb(Mg_(1/3)Nb_(2/3))O_(3)-PbTiO_(3)(PIN-PMN-PT)single crystal with giant electro-optic coefficient(λ_(c))and high transparency indicates the potential to achieve greatly enhanced modulation *** this study,a prototype PIN-PMN-PT phase modulator was fabricated based on a titanium(Ti)in-diffusion waveguide,which is reported for the first *** influences of titanium in-diffusion on the composition and domain structure of the PIN-PMN-PT single crystal were studied by transmission electron microscopy(TEM)and piezoelectric force microscopy(PFM),***,a half-wave voltage(V_(π))of 2.3 V was obtained using a device with 6-mm-long(L)***,the electro-optic modulation efficiency(V_(π)L)was calculated as 1.38 V-cm,which was approximately one order of magnitude lower than that of commercial lithium niobate(LiNbO_(3),LN)phase *** enhanced modulation efficiency indicates more compact device and lower power consumption,which is of great significance for electro-optic modulation systems used in micro-fiber gyroscope,integrated photonic devices,etc.

关键词： Pb(In_(1/2)Nb_(1/2))O_(3)-Pb(Mg_(1/3)Nb_(2/3))O_(3)-PbTiO_(3)(PIN-PMN-PT)single crystal titanium(Ti)in-diffusion waveguide electro-optic modulator

Boosting the piezoelectric property of relaxor ferroelectric single crystal via active manipulation of defect dipole polarization

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Journal of Materiomics 2023年第1期9卷 166-173页

作者： Qingyuan Hu Huimin Liao Xin Liu Li Jin Kexin Song yongyong zhuang Zhuo Xu Vladimir Ya Shur Xiaoyong Wei Electronic Materials Research Laboratory Key Laboratory of the Ministry of Education&International Center for Dielectric ResearchSchool of Electronic ImformationXi'an Jiaotong UniversityXi'an710049China School of Natural Sciences and Mathematics Ural Federal UniversityEkaterinburg620000Russia

To further enhance the property of piezoelectric materials is of great significance to improve the overall performance of electro-mechanical *** in this work,we propose a thermal annealing and high temperature poling approach to achieve significantly enhanced piezoelectricity in Pb(In_(1/2)Nb_(1/2))O_(3)single bondPb(Mg_(1/3)Nb_(2/3))O_(3)single bondPbTiO_(3)(PIN-PMN-PT)crystals with a morphotropic phase boundary(MPB)*** main idea of our approach is to realize a more sufficiently polarized crystal via active manipulation of defects and orientation of defect *** of defect dipoles by the high temperature poling is proved by the piezo-response force ***,a d_(33)of 3300 pC/N and a SE of 0.25%are obtained,nearly 60%higher than that of conventionally poled ***,such a boosting of piezoelectric property is obtained under a maintained Curie *** research not only reveals the active control of defect dipole via modified poling method in the PIN-PMN-PT crystal,but also provides a feasible strategy to further improve the property of piezoelectric materials.

关键词： Piezoelectric property Relaxor ferroelectric single crystals Defects Defect polarization

Wideband polarization-independent anomalous reflection metasurface with multiple resonance modes

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Journal of Advanced Dielectrics 2017年第2期7卷 17-20页

作者： Guoxiang Dong Song Xia yongyong zhuang Hongyu Shi Zhan Zhang Yuchen He Anxue Zhang Xiaoyong Wei Zhuo Xu Electronic Materials Research Laboratory Key Laboratory of the Ministry of Education&International Center for Dielectric Research Xi'an Jiaotong University Xi'anShaanxi 710049P.R.China School of Electronic and Information Engineering Xi'an Jiaotong University Xi'an Shaanxi 710049P.R.China Zhonghang Electronic Measuring Instruments Co. Ltd Xi'anShaanxi 710049P.R.China

An ultra-thin metasurface is proposed to realize wideband polarization-independent anomalous reflection. The sub-wavelengthresonator can produce different resonance modes, which are the result of the combined effect of dielectric and the metallic *** gradient metasurface is done by six discrete orientation of the local sub-wavelength resonator which provides a phase *** simulation and measured results show that 9 GHz bandwidth of the anomalous reflection is achieved.

关键词： Metasurface anomalous reflection polarization

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BaTiO_3基陶瓷介电材料的研究进展

中国陶瓷 2008年第11期44卷 6-8页

作者：杨公安蒲永平王瑾菲庄永勇陕西科技大学材料科学与工程学院西安710021

阐述了BaTiO3基陶瓷电容器系统中通过添加不同添加剂(ZnO、Y2O3、MgO、V2O5、Bi2O3、Fe2O3、Co2O3、Nb2O5、Dy2O3等)对陶瓷温度特性、介电常数、介质损耗及击穿场强的影响,并对具有高介高稳定性的介电材料进行综述及展望。

关键词： BaTiO3 添加剂介电常数介质损耗

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倾斜耦合的光栅耦合器研究进展

压电与声光 2022年第4期44卷 570-587页

作者：张一凡庄永勇杨柳杜波波刘鑫胡庆元夏钰坤张磊魏晓勇徐卓西安交通大学电子陶瓷与器件教育部重点实验室多功能材料与结构教育部重点实验室国际电介质研究中心电子科学与工程学院陕西西安710049 江西匀晶光电技术有限公司江西九江332000

近年来,片上光子集成技术备受关注并飞速发展,但在光纤与芯片、芯片与芯片上实现高效、高可靠性的光耦合仍是难题。光栅因其制作简单,位置灵活,对准容差大及可实现片上测试等一系列优点而备受研究者的关注。目前在绝缘体上硅(SOI)平台... 详细信息

近年来,片上光子集成技术备受关注并飞速发展,但在光纤与芯片、芯片与芯片上实现高效、高可靠性的光耦合仍是难题。光栅因其制作简单,位置灵活,对准容差大及可实现片上测试等一系列优点而备受研究者的关注。目前在绝缘体上硅(SOI)平台和绝缘体上铌酸锂(LNOI)平台上已开发出大量的光栅耦合器件,并获得较高的耦合效率和大带宽。该文主要介绍光栅耦合器的工作原理和主要性能指标,阐述了均匀光栅、倾斜光栅、闪耀光栅和切趾光栅耦合的特点及现阶段进展,并对具有代表性的一维光栅性能指标进行了比较。结果表明,分布式布喇格反射镜和金属反射镜可有效地提升光栅耦合效率。此外,该文还介绍了基于LNOI平台的几种光栅耦合器,其可帮助研究者们梳理光栅耦合器的发展历程、研究现状及各耦合器的特点,为未来研究提供一定的参考。

关键词：光栅耦合绝缘体上硅(SOI) 耦合效率闪耀光栅切趾光栅

Building highly active hybrid double-atom sites in C_(2)N for enhanced electrocatalytic hydrogen peroxide synthesis

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Green Energy & Environment 2021年第6期6卷 846-857页

作者： yongyong Cao JinYan Zhao Xing Zhong Guilin zhuang Shengwei Deng Zhongzhe Wei Zihao Yao Jianguo Wang College of Biological Chemical Science and Engineering Jiaxing UniversityJiaxing314001China Institute of Industrial Catalysis College of Chemical EngineeringState Key Laboratory Breeding Base of Green–Chemical Synthesis TechnologyZhejiang University of TechnologyHangzhou310032China

Two-electron(2 e^(-))oxygen reduction reaction(ORR)shows great promise for on-site electrochemical synthesis of hydrogen peroxide(H_(2)O_(2)).However,it is still a great challenge to design efficient electrocatalysts for H_(2)O_(2)*** address this issue,the logical design of the active site by controlling the geometric and electronic structures is urgently ***,using density functional theory(DFT)computations,two kinds of hybrid double-atom supported on C_(2)N nanosheet(RuCu@C_(2)N and PdCu@C_(2)N)are screened out and their H_(2)O_(2)performances are ***@C_(2)N exhibits higher activity for H_(2)O_(2)synthesis with a lower overpotential of 0.12 V than RuCu@C_(2)N(0.59 V),Ru_(3)Cu(110)facet(0.60 V),and PdCu(110)facet(0.54 V).In aqueous phase,the adsorbed O_(2)is further stabilized with bulk H_(2)0 and the thermodynamic rate-determining step of 2 e^(-) ORR *** activation barrier on PdCu@C_(2)N is 0.43 eV lower than the one on RuCu@C_(2)N with 0.68 ***@C_(2)N is near the top of 2 e^(-) ORR volcano plot,and exhibits high selectivity of H_(2)O_(2.)This work provides guidelines for designing highly effective hybrid double-atom electrocatalysts(HDACs)for H_(2)O_(2)synthesis.

关键词： Hydrogen peroxide(H_(2)O_(2)) Oxygen reduction reaction(ORR) Hybrid double-atoms catalysts(HDACs) Density functional theory(DFT) Aqueous phase

参加全国总α、总β放射性测量能力比对结果分析

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中国辐射卫生 2024年第1期33卷 40-45页

作者：陈永雍施扬海时宇花王萍卢远盛广西壮族自治区职业病防治研究院广西南宁530021

目的通过分析历年全国总α、总β放射性测量能力比对结果,对相关技术问题进行总结和提高。方法按照比对要求,依据国家标准进行水中总α、总β放射性检测,分析比对结果,探讨影响结果的因素。结果 2018—2022年5次参加全国水中总α、总... 详细信息

目的通过分析历年全国总α、总β放射性测量能力比对结果,对相关技术问题进行总结和提高。方法按照比对要求,依据国家标准进行水中总α、总β放射性检测,分析比对结果,探讨影响结果的因素。结果 2018—2022年5次参加全国水中总α、总β放射性检测能力比对,总α放射性、总β放射性的Z检验值范围分别为-0.24~1.8和-1.4~0.35,相对偏差范围分别为-4%~32%和-18%~6%,比对结果均为合格。结论经过比对分析与技术总结改进,测量结果均在合格范围内,且与参考值的相对偏差呈逐年减小的趋势,提高了测量准确度。

关键词：水中总α、总β放射性比对结果分析

一例寻常型天疱疮合并升结肠恶性肿瘤患者皮肤与围手术期的护理

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中国麻风皮肤病杂志 2024年第5期40卷 362-364页

作者：王霞张婷郑捷娄嫚嫚袁勇勇云南省文山州皮肤病防治所云南文山663099 上海交通大学医学院附属瑞金医院上海200025

寻常型天疱疮伴发肿瘤多为副肿瘤型天疱疮(PNP)。PNP累及皮肤黏膜,临床表现易与寻常型天疱疮、扁平苔藓、大疱性类天疱疮等混淆[1]。寻常型天疱疮(PV)是累及皮肤黏膜的自身免疫性大疱性皮肤病,主要表现为皮肤出现易破溃的松弛性水疱和大... 详细信息

寻常型天疱疮伴发肿瘤多为副肿瘤型天疱疮(PNP)。PNP累及皮肤黏膜,临床表现易与寻常型天疱疮、扁平苔藓、大疱性类天疱疮等混淆[1]。寻常型天疱疮(PV)是累及皮肤黏膜的自身免疫性大疱性皮肤病,主要表现为皮肤出现易破溃的松弛性水疱和大疱,破溃后形成糜烂面[2],极易因皮肤糜烂继发皮肤感染而至的菌血症/败血症及其多系统感染[3]。

关键词：寻常型天疱疮大疱性类天疱疮扁平苔藓皮肤糜烂糜烂面菌血症松弛性水疱围手术期的护理

A theoretical study of electrocatalytic ammonia synthesis on single metal atom/MXene

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Chinese Journal of Catalysis 2019年第2期40卷 152-159页

作者： Yijing Gao Han Zhuo yongyong Cao Xiang Sun Guilin zhuang Shengwei Deng Xing Zhong Zhongzhe Wei Jianguo Wang Institute of Industrial Catalysis College of Chemical EngineeringState Key Laboratory Breeding Base of Green-Chemical Synthesis TechnologyZhejiang University of TechnologyHangzhou 310032ZhejiangChina

Electrocatalytic ammonia synthesis under mild conditions is an attractive and challenging process in the earth’s nitrogen cycle,which requires efficient and stable catalysts to reduce the *** N2 activation and reduction overpotential of different Ti3C2O2-supported transition metal(TM)(Sc,Ti,V,Cr,Mn,Fe,Co,Ni,Cu,Zn,Mo,Ru,Rh,Pd,Ag,Cd,and Au)single-atom catalysts have been analyzed in terms of the Gibbs free energies calculated using the density functional theory(DFT).The end-on N2 adsorption was more energetically favorable,and the negative free energies represented good N2 activation performance,especially in the presence Fe/Ti3C2O2(﹣0.75 eV).The overpotentials of Fe/Ti3C2O2,Co/Ti3C2O2,Ru/Ti3C2O2,and Rh/Ti3C2O2 were 0.92,0.89,1.16,and 0.84 eV,*** potential required for ammonia synthesis was different for different TMs and ranged from 0.68 to 2.33 *** possible potential-limiting steps may be involved in the process:(i)hydrogenation of N2 to*NNH and(ii)hydrogenation of*NH2 to *** catalysts can change the reaction pathway and avoid the traditional N–N bond-breaking *** also simplifies the understanding of the relationship between the Gibbs free energy and overpotential,which is a significant factor in the rational designing and large-scale screening of catalysts for the electrocatalytic ammonia synthesis.

关键词： Electrocatalytic ammonia synthesis Single atom catalyst MXene Transition metal Density functional theory Overpotential Gibbs free energy