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Highly efficient sono-piezo-photo synergistic catalysis in bismuth layered ferroelectrics via finely distinguishing sonochemical and electromechanochemical processes

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Journal of Materiomics 2022年第1期8卷 47-58页

作者： Lizhen Lu Nan Liang Haiqin Sun Qiwei Zhang xihong hao Inner Mongolia Key Laboratory of Ferroelectric-related New Energy Materials and Devices School of Materials and MetallurgyInner Mongolia University of Science and Technology7#Arerding StreetKun DistrictBaotou014010China

Ultrasonic stimulation induced polarization behaviors in ferroelectric materials have been extensively explored in catalytic ***,the ultrasonic wave similarly can realize dye degradation by the sonocatalysis behavior,which is always neglected in most reports on in-situ ultrasound-induced piezoelectric catalysis,so that people might overestimate piezocatalytic *** this,we designed a series of visible light sensitive bismuth layered ferroelectric materials(BLFMs),M_(0.5)Bi_(2.5)Nb_(2)O_(9)(MBN,M=Li,Na,and K).It is found that the cavitation-induced degradation rates of Rhodamine B(RhB)strongly depend mechanical stirring speeds under a fixed ultrasonic power,which gradually increases with it,and reaches 77.9%(500 rpm and 3 h).Under lower stirring speed and reaction time(<50 rpm and 2 h),the cavitation effect is almost negligible,only piezocatalysis behavior occurs,which can be used as a key condition to distinguish the piezocatalysis and *** particular,the degradation rate constant of Na_(0.5)Bi_(2.5)Nb_(2)O_(9) catalyst reaches up to 4.943×10^(-2) min^(-1) by the coupling of sonocatalysis,piezocatalysis and photocatalysis,which is much higher than that of single photocatalysis(0.491×10^(-2) min^(-1)),piezocatalytic(1.6×10^(-3) min^(-1)),and sonocatalysis(0.756×10^(-2) min^(-1)).These results may provide a feasible strategy of further improving catalytic degradation efficiency,and accurately determining the sonocatalysis and piezocatalysis contribution.

关键词： Polarization Piezocatalysis Sonocatalysis Ferroelectric materials

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Multicolor upconversion reversible modulations in YNbO_(4):Er^(3+)/Tm^(3+)/Yb^(3+) photochromic materials

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Journal of Rare Earths 2024年第2期42卷 270-277,I0002页

作者： Zhen Zhang Peng Li Ziyi Xu Zhihao Zhang Qiwei Zhang Haiqin Sun xihong hao Inner Mongolia Key Laboratory of Ferroelectric-related New Energy Materials and Devices Schoolof Materials and MetallurgyInner Mongolia University of Science and TechnologyBaotou014010China College of Physics and Technology Guangxi Normal UniversityGuilin541004China

Photochromic materials with multicolor upconversion reversible modulations are attractive in optical switching ***,the fabricated YNbO_(4):Er^(3+)/Tm^(3+)/Yb^(3+) materials exhibit excellent photochromism and multicolor upconversion properties from green,red to near infrared(NIR) emissions with increasing Yb *** multiband upconversion modulations are achieved by alternating light(365 and 405 nm) or thermal *** 365 nm irradiation,the luminescence color changes from yellow to red,the luminescent photoswitching contrast reaches up to 86.21%(green),82.12%(red) and 77.38%(NIR) in the Y_(0.83)Er_(0.01)Tm_(0.01)NbO_(4):0.15 Yb ***,the upconversion emission intensity before and after photochromic reaction shows remarkable change in a wide temperature range of 298-718 *** results indicate that the Er^(3+)/Tm^(3+)/Yb^(3+) tri-doped YNbO_(4) materials can be a good candidate in optical switching and data storage applications.

关键词： Photochromic materials Luminescence modulation Multicolor emission Photoswitching contrast Rare earths

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A review on the dielectric materials for high energy-storage application

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Journal of Advanced Dielectrics 2013年第1期3卷 5-18页

作者： xihong hao Laboratory of Integrated Exploitation of Bayan Obo Multi-Metal Resources Inner Mongolia University of Science and Technology Baotou 014010P.R.China School of Materials and Metallurgy Inner Mongolia University of Science and Technology Baotou 014010P.R.China

With the fast development of the power electronics,dielectric materials with high energy-storage density,low loss,and good temperature stability are eagerly desired for the potential application in advanced pulsed *** on the physical principals,the materials with higher saturated polarization,smaller remnant polarization,and higher electrical breakdown field are the most promising *** to this rule,so far,four kinds of materials,namely antiferroelectrics,dielectric glass-ceramics,relaxor ferroelectric and polymer-based ferroelectrics are thought to be more likely used in next-generation pulsed capacitors,and have been widely ***,this review serves to give an overall summary on the state-of-the-art progress on electric energy-storage performance in these ***,some general future prospects are also provided from the existed theoretical and experimental results in this work,in order to propel their application in practice.

关键词： Microstructure energy storage dielectric properties antiferroelectrics glass-ceramic relaxor ferroelectrics polymers

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Tuning the ferroelectric,dielectric and photoluminescence properties of 0.88(Na_(0.5)Bi_(0.5))TiO_(3)-0.12BaTiO_(3) ceramics by Sm ion doping

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Journal of Advanced Dielectrics 2019年第5期9卷 87-92页

作者： Yong Li Jun Zhao Xinglei Zhang Qiannan Jia xihong hao Inner Mongolia Key Laboratory of Ferroelectric-Related New Energy Materials and Devices Inner Mongolia University of Science and Technology Baotou 014010 P.R.China

Solid solutions of the lead-free 0.88(Na_(0.5)Bi_(0.5))TiO_(3)-0.12BaTiO_(3)(NBT-BT:xSm)ferroelectric ceramics were synthesized by solid state *** doping of Sm promotes the structure of the ceramics to transform toward morphotropic phase boundary,and it decreases the grain size of the *** the increase of Sm content,the ferroelectric properties are improved gradually,where the ferroelectric polarization increases and the coercive field *** doping induces a dielectric anomaly with obvious frequency dispersion at a low temperature,exhibiting the transition from the ferroelectric to relaxor ***,the photo-luminescence spectra of NBT-BT:xSm ceramics exhibit a strong orange emission upon blue light excitation of the 400 nm to 500 *** emission intensities are strongly dependent on the Sm doping concentration,which reached the optimal value as the doping concentration is 0.7%.These results suggest that the NBT-BT:xSm ceramics may have significant technological promise in novel multifunctional devices.

关键词： NBT-BT rare earth ferroelectric dielectric photoluminescence

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Flexible multilayer lead-free film capacitor with high energy storage performances via heterostructure engineering

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Journal of Materiomics 2022年第4期8卷 772-780页

作者： Ningning Sun Jinhua Du Ye Zhao Chunxiao Lu Pei Han Yong Li Qiwei Zhang xihong hao Inner Mongolia Key Laboratory of Ferroelectric-Related New Energy Materials and Devices School of Materials and MetallurgyInner Mongolia University of Science and TechnologyBaotou014010China

The immense potential of flexible energy storage materials applied in wearable electronic devices hasstimulated a lot of science researches on manufacturing technology and performance ***, an all-inorganic flexible ferroelectric film with multilayer heterostructure is prepared based onMn doped Bi0.5Na0.5TiO_(3)eBiNi0.5Zr0.5O_(3) (Mn:BNT-BNZ) and Bi0.5Na0.5TiO_(3)eBiZn0.5Zr0.5O_(3) (BNT-BZZ)relaxor ferroelectrics. A win-win situation of breakdown strength and polarization is achieved in theMn:BNT-BNZ/BNT-BZZ multilayer film with the stacking period N - 3, of which energy density and ef-ficiency reach 80.4 J/cm3 and 62.0% respectively. It is proposed that the excellent energy storage per-formances are attributed to the synergistic effect of the electric field amplification effect, interfaceblocking effect and the polarization coupling effect based on the multilayer heterostructure. Moreover,the flexible ferroelectric film exhibits outstanding temperature (25e205 - C), frequency (0.5e5 kHz)stability and antifatigue property (1 108 cycles), and can well maintain stable performance at differenttensile/compressive bending radii (10e5 mm) and even after 104 bending cycles with a fixed bendingradius of 3 mm. This work opens up a promising route to the development of flexible energy storagematerials.

关键词： Energy storage Ferroelectric Flexible Multilayer Heterostructure

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Anomalous photovoltaic effect in Na_(0.5)Bi_(0.5)TiO_(3)-based ferroelectric ceramics based on domain engineering

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Journal of Materiomics 2024年第5期10卷 975-983页

作者： Xinxiang Yang Xing Gao Shan Zhang Jun Zhao Xinlei Zhang Xin Song Chunxiao Lu Yong Li Liwen Zhang xihong hao Inner Mongolia Key Laboratory of Ferroelectric-Related New Energy Materials and Devices School of Materials and MetallurgyInner Mongolia University of Science and TechnologyBaotou014010China

The anomalous photovoltaic(APV)effect is promising for high-performance ferroelectric materials and devices in photoelectric ***,it is a challenge how to tune the APV effect by utilizing the characteristic structure of ***,a domain engineering strategy is proposed to enhance the APV effect in lead-free 0.88(Na_(0.5)Bi_(0.5)TiO_(3))-0.12(Ba_(1–1.5x)S_(mx)TiO_(3))(NBT-BST)ferroelectric *** tuning the domain size based on Sm^(3+)doping,a maximum open-circuit voltage(VOC)of 18.1 V is obtained when Sm^(3+)content is 0.75%,which is much larger than its bandgap(Eg).The mechanism of this large VOC originates from the multiple positive effects induced by the small-size domain,where decreasing domain size enhances ferroelectric polarization and net interface barrier potential,leading to a large driving electric ***,the APV effect exhibits a giant temperature sensitivity due to the dramatic evolution of small-size domain in the temperature *** work sheds light on the exploration of ferroelectrics with APV effect and inspires their future high-performance optoelectronic device applications.

关键词： Anomalous photovoltaic effect Ferroelectric Domain NBT-BST ceramics Polarization

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Effects of thickness on the microstructure and energy-storage performance of PLZT antiferroelectric thick films

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Journal of Advanced Dielectrics 2013年第3期3卷 24-30页

作者： Ningning Sun Ying Wang Liwen Zhang Xuefeng Zhang xihong hao Meiling Li Laboratory of Integrated Exploitation of Bayan Obo Multi-Metal Resources Inner Mongolia University of Science and Technology Baotou 014010 P.R.China School of Materials and Metallurgy Inner Mongolia University of Science and Technology Baotou 014010 P.R.China College of Physics and Technology Inner Mongolia University Hohhot 010020 P.R.China

The typical antiferroelectric(AFE)thick films Pb_(0.94)La_(0.04)(Zr_(0.98)Ti_(0.02))O_(3)(PLZT 4/98/2)with different thicknesses of 2,4,6 and 10μm were successfully deposited on Pt(111)/TiO_(2)/SiO_(2)/Si(100)substrates from polyvinylpyrrolidone(PVP)-modified chemical *** effects of thickness on the crystalline structure,electrical properties and the energy-storage performance were investigated in detail.X-Ray diffraction analysis and scanning electron microscopy pictures indicated that AFE films with a thickness less than 4m showed a(111)-preferred orientation with uniform surface *** electrical measurement results illustrated that,as the thickness increased,the saturation polarization,remnant polarization,dielectric constant and leakage current of AFE thick films were enhanced gradually,while the capacitive density and the critical breakdown fields were ***,all the PLZT 4/98/2 AFE films shared the same Curie temperature of about 224℃.As a result,the AFE thick films showed good energy-storage stability in a wide temperature *** maximum energy-storage density of 47.4 J/cm^(3) was obtained in the 2-μm-thick PLZT 4/98/2 films measured at 3699 kV/cm.

关键词： Electronic materials chemical synthesis dielectric properties energy storage

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气态悬浮炉在稀土碳酸盐焙烧中的应用开发

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中国稀土学报 2021年第4期39卷 616-623页

作者：田皓崔建国郝喜红王哲徐萌张伟白云鄂博稀土资源研究与综合利用国家重点实验室包头稀土研究院内蒙古包头014030 内蒙古科技大学材料与冶金学院内蒙古包头014010 包头华美稀土高科有限公司内蒙古包头014015

以热分解温度较高的碳酸镧为原料,将气态悬浮焙烧设备引入到稀土行业中进行稀土碳酸盐的焙烧处理。采用同步热分析仪、X射线衍射仪、激光粒度仪、扫描电子显微镜、智能粉体特性测试仪对产品的热分解过程、晶相组成、晶体粒度、形貌特征... 详细信息

以热分解温度较高的碳酸镧为原料,将气态悬浮焙烧设备引入到稀土行业中进行稀土碳酸盐的焙烧处理。采用同步热分析仪、X射线衍射仪、激光粒度仪、扫描电子显微镜、智能粉体特性测试仪对产品的热分解过程、晶相组成、晶体粒度、形貌特征、比表面积、密度和安息角等特性进行了表征。对连续生产过程中的能耗、产品收率等实际生产指标进行持续监测,并与传统静态焙烧工艺做综合性比较。结果表明:气态悬浮炉焙烧稀土碳酸盐的适应性强,可以生产出合格的稀土氧化物产品,产品无过烧或欠烧,产品流动性好,比表面积大,单位产品能耗低,该设备可以在稀土行业推广。

关键词：气态悬浮炉碳酸镧氧化镧表征合格产品

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新活素对老年急性失代偿期心衰患者心功能及BNP水平的影响分析

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智慧健康 2023年第24期9卷 162-165,169页

作者：郝喜红陇南市第一人民医院心血管内科一病区甘肃陇南746000

目的探讨老年ADHF患者采取新活素治疗的效果。方法选取2022年3月—2023年3月本院收治的60例老年ADHF患者,经随机分组后采取不同治疗方式,对比两组临床效果、治疗前后心功能、BNP水平以及生活质量。结果研究组治疗总有效率高于对照组... 详细信息

目的探讨老年ADHF患者采取新活素治疗的效果。方法选取2022年3月—2023年3月本院收治的60例老年ADHF患者,经随机分组后采取不同治疗方式,对比两组临床效果、治疗前后心功能、BNP水平以及生活质量。结果研究组治疗总有效率高于对照组,组间差异有统计学意义(P0.05),治疗后两组LVESD、LVEDD均有所降低(P0.05);治疗后两组BNP水平、MLHFQ评分均有所降低(P<0.05),但研究组降低更明显,差异有统计学意义(P<0.05)。结论采取新活素治疗老年ADHF患者,不仅可提升疗效,改善患者心功能、生活质量,还可降低其BNP水平。

关键词：老年ADHF 新活素常规治疗心功能 BNP水平生活质量

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Optimization of energy storage properties in(1−x)Na_(0.5)Bi_(0.5)TiO_(3)-xSr_(0.7)La_(0.2)TiO_(3)-relaxed ferroelectric ceramics

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Journal of Advanced Dielectrics 2023年第1期13卷 25-31页

作者： Ziyue Ma Jianye Zhu Jianhua Wu Yanhua Hu Xiaojie Lou Ningning Sun Ye Zhao Yong Li xihong hao Inner Mongolia Key Laboratory of Ferroelectric-Related New Energy Materials and Devices School of Materials and Metallurgy Inner Mongolia University of Science and Technology BaotouInner Mongolia 014010P.R.China Department of Chemical Engineering Ordos Institute of TechnologyOrdos Inner Mongolia 017000P.R.China Frontier Institute of Science and Technology and State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong University Xi’an Shaanxi 710049P.R.China

Ferroelectric materials are considered to be the most competitive energy storage materials for applications in pulsed power electronics due to excellent charge-discharge ***,the low energy storage density is the primary problem limiting their practical *** this study,(1−x)Na_(0.5)Bi_(0.5)TiO_(3)-xSr_(0.7)La_(0.2)TiO_(3)[(1−x)NBT-xSLT]ferroelectric ceramics are found to exhibit excellent energy storage performances through a synergistic *** the SLT concentration increases,the relaxation characteristic increases significantly and the breakdown strength increases dramatically from 150 kV/cm to 220 kV/*** recoverable energy storage density of the _0.55NBT-0.45SLT ceramic is 2.86 J/cm^(3) with an energy storage efficiency of 88%under an electric field of 220 kV/***,the ceramic with x=0.45 mol exhibited excellent energy storage stability in the ranges of 20-180℃(temperature)and 1-125 Hz(frequency).These excellent properties demonstrate the potential of(1−x)NBT-xSLT ceramics when used as dielectric capacitors in pulsed power systems.

关键词： Energy storage ferroelectric lead-free ceramics dielectric microstructure

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