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BaTiO3 solid solutions co-doped with Gd3+ and eu3+:Synthesis,structural evolution and dielectric properties

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Journal of Rare earths 2024年第10期42卷 1920-1926页

作者： R.Martínez-López M.Pérez-Labra J.A.Romero-Serrano F.R.Barrientos-Hernández M.Reyes-Pérez M.I.Valenzuela-Carrillo G.Urbano-Reyes V.e.Reyes-Cruz G.I.Dávila-Pulido Academic Area of earth Sciences and Materials Autonomous University of Hidalgo State Metallurgy and Materials Department ESIQIE-IPNUPALM Autonomous University of Coahuila Boulevard Adolfo López Mateos S/n

In this paper,the synthesis,structural evolution,and dielectric properties of BaTiO3solid solutions codoped with rare earth elements(Gd3+and eu3+) prepared using the solid-state reaction method are *** pure precursor powders of BaCl3,TiO2,Gd2O3,and eu2O3were mixed in stoichiometric proportions,ground in an agate mortar before being uniaxially pressed at 250 MPa and sintered at 1300℃ in air atmosphere for 6 h to obtain Ba1-3xGd2xTi1-3xeu4xO3（x=0,0.0015,0.01 and0.1）.X-ray diffraction（XRD） and Rietveld's refinement results reveal the crystal phase ferroelectric tetragonal BaTiO3for the samples with x=0,0.0015 and 0.01, as well as a consistent increment in the lattice parameters caused by the *** solubility limit of Gd3+and eu3+in the BaTiO3structure is reached for the sample with x>0.01,and the orthorhombic eu2TiO5and monoclinic BaTi2O5secondary phases were *** Raman results show the characteristic peaks of ferroelectric tetragonal BaTiO3around 716 cm-1（LO of A1 symmetry）,515 cm-1（TO of A1 symmetry）,and 305 cm-1（B1）.The maximum relative permittivity measured at 1 kHz was recorded to be 6151.8 for the sample with x=0.0015,and a decrease in the curie.temperature to 105℃ with respect to the undoped sample was *** punctual microanalysis for the samples with x=0.0015,0.01,and 0.1 reveals grains composed of Ba,Ti,O,Gd,and eu homogeneously distributed in the *** Ba/Ti ratios for samples with x=0.0015,0.01 and 0.1 are 2.86,2.91,and 0.68,respectively,indicating substitution at the Ti site for samples with x=0.0015 and 0.01 and a substitution at the Ba site for the sample with x=0.1.

关键词： BaTiO3 Doping europium Gadolinium Rare earths Synthesis

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万有文库第二集七百种居礼传上下

万有文库第二集七百种居礼传上下

Compressive behavior and energy absorption of metal porous polymer composite with interpenetrating network structure

1935年

作者：王云五Marie curie.黄人杰译述

来源：汇雅图书（南通市图书馆... 评论

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汇雅图书（南通市图书馆）

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Transactions of Nonferrous Metals Society of China 2006年第S2期 439-443页

作者： LIU Yu, GONG Xiao-lu Institut Charles Delaunay, CNRS FRe 2848, LASMIS, UTT 12, rue Marie curie. BP 2060, 10010 Troyes, France

Interpenetrating phase composites (IPCs) are a new class of composite materials with improved combinations of mechanical and physical properties. This study was performed on a new type of IPC called metal porous polymer composite (MPPC) with an interpenetrating network structure. Aluminum-polypropylene (AI-Pe) and Aluminum-epoxy resin (Al-ep) composites were produced by infiltrating the polymer in the aluminum foam. The composite microstructures were characterized using SeM observation. The compressive behavior and energy absorption characteristics of MPPC were investigated and compared with the aluminum foams. The compressive modulus of composite was compared with the VOIGT-ReUSS bounds and HASHIN-SHTRIKMAN (H-S) bounds models. The experimental modulus of compressive tests falls well within the theoretical models.

关键词： MPPC composite micro structure compressive behavior energy modulus

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科学高地的巨人夫妇——居里夫人与居里

作者： (法)玛丽·居里(Marie curie.

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居里夫人自传

Lipschitz Properties in Variable exponent Problems via Relative Rearrangement

2017年

作者： (法)玛丽·居里(marie curie.

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Chinese Annals of Mathematics,Series B 2010年第6期31卷 991-1006页

作者： Jean-Michel RAKOTOSON UMR 6086 CNRS.Laboratoire de Mathématiques Université de Poitiers SP2MI Boulevard Marie et Pierre Curie Téléport 2 BP30179 86962 Futuroscope Chasseneuil Cedex France

The author first studies the Lipschitz properties of the monotone and relative rearrangement mappings in variable exponent Lebesgue spaces completing the result given in [9]. This paper is ended by establishing the Lipschitz properties for quasilinear problems with variable exponent when the right-hand side is in some dual spaces of a suitable Sobolev space associated to variable exponent.

关键词： Monotone rearrangement Relative rearrangement Variable exponents Quasi-linear equations

A ReMARK ON FORMAL MODeLS FOR NONLINeARLY eLASTIC MeMBRANe SHeLLS

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Chinese Annals of Mathematics,Series B 2001年第3期22卷 307-324页

作者： C. COLLARD Laboratoire d’Analyse Numerique, Tour n°55, Universite Pierre et Marie curie. 4, place Jussieu, 75005 Paris, France. Laboratoire de Mathematiques Appliquees au Calcul Scientifique, Universite de Valenciennes et du Hainaut-Cambresis, Le Mont H Labiratoire d'Analyse Numérique Tour n°55 Université Pierre et Marie Curie 4 place Jussieu 75005 Paris France Laboratoire de Mathématiques Appliquées au Calcul Scientifique Université de Valenciennes et du Hainaut-Cambresis Le Mont Houy - B.P. 311 - F 59304 Valenciennes cedex France

This paper gives all the two-dimensional membrane models obtained from formal asymptotic analysis of the three-dimensional geometrically exact nonlinear model of a thin elastic shell made with a Saint Venant-Kirchhoff material. Therefore, the other models can be quoted as flexural nonlinear ones. The author also gives the formal equations solved by the associated stress tensor and points out that only one of those models leads, by linearization, to the "classical" linear limiting membrane model, whose justification has already been established by a convergence theorem.

关键词： Nonlinear elastic shell Convergence theorem Asymptotic analysis

四面体对称中d5离子的4T2能级的压电光谱学研究.Jahn-Teller相互作用和反常偶极子强度

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发光学报 1975年第6期 50-51页

作者： R PARROT,D.curie 法国居里大学发光实验室法国居里大学发光实验室

我们指出,对于对称中的d5离子而言,Jahn-Teller相互作用或反常偶极子强度（DS）使关于三重态的零声子线（ZPL）结构的分析变得极为复杂。我们也指出了对单轴应力效应例如ZPL的移动、劈裂和极化的仔细研究,不仅对Jahn-Teller相互作用,同... 详细信息

我们指出,对于对称中的d5离子而言,Jahn-Teller相互作用或反常偶极子强度（DS）使关于三重态的零声子线（ZPL）结构的分析变得极为复杂。我们也指出了对单轴应力效应例如ZPL的移动、劈裂和极化的仔细研究,不仅对Jahn-Teller相互作用,同时对偶极子强度计算中所包含的机构,都给出了详细的知识。首先分析了Jahn-Teller耦合对4T2态

关键词：偶极子强度三重态 ZPL 多重态能级 d~5 Jahn-Teller 压电离子光谱学

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天道酬勤

初中生 2021年第9期 28-31页

作者：玛丽·居里不详

1891年11月,在24岁时,我终于实现了多年以来魂牵梦萦的愿望。到达巴黎的时候,我受到姐姐和姐夫的热情欢迎,但我只在他们家住了几个月。为了方便姐夫行医,他们住在巴黎郊外,那里距离我上学的学校很远,所以我需要就近住宿。像国内许多学... 详细信息

1891年11月,在24岁时,我终于实现了多年以来魂牵梦萦的愿望。到达巴黎的时候,我受到姐姐和姐夫的热情欢迎,但我只在他们家住了几个月。为了方便姐夫行医,他们住在巴黎郊外,那里距离我上学的学校很远,所以我需要就近住宿。像国内许多学生一样,在一个带有少量家具的小房间,我安顿下来。就这样,我艰难地度过了四年留学生活。

关键词：四年留学生活巴黎