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Temperature dependent behaviors of electro-elastic properties of NdCa_(4)O(BO_(3))_(3)crystal with monoclinic symmetry

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Journal of Rare Earths 2022年第11期40卷 1772-1777,I0004页

作者： Guiteng Yao Feifei Chen Fapeng Yu Xian Zhao State Key Laboratory of crystal materials Center for Optics Research EngineeringShandong UniversityJinan 250100China

Rare-earth calcium oxyborate crystals(RECa_(4)O(BO_(3))_(3),RECOB,RE:rare-earth elements)are a kind of multifunctional crystal materials.In this work,the temperature dependent behaviors of the electroelastic constants of NdCOB crystal were investigated over the temperature range of-80-200℃,and their temperature coefficients were evaluated.It is found that NdCOB crystal possesses minimal variation of relative dielectric permittivities(crystal cut.Furthermore,the electromechanical coupling factors and piezoelectric coefficients as a function of temperature were studied.The electromechanical coupling factor kand piezoelectric coefficient dare determined to be~30.8%and~15.2 pC/N at room temperature,respectively.The large piezoelectric response and zero temperature coefficient of frequency indicate the potential usage of NdCOB crystal for piezoelectric frequency devices over a wide temperature range.

关键词： NdCOB Electro-elastic constants Temperature dependence Zero temperature coefficient of frequency Rare earths

Design considerations for re-functionalizing electrocatalytic materials

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Science China(Technological Sciences) 2023年第12期66卷 3355-3368页

作者： ZHANG DanTong PENG Chao XUE DongFeng Multiscale crystal materials research center Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China

Electrocatalytic materials are a critical bottleneck for the development of new energy economics.This review summarizes the unique physicochemical properties of topological,magnetic,and rare earth materials and their applications in the functionalization of electrocatalysts.Topological materials have unique band structures and geometric structures,and the interface difference in charge transport structures can give rise to topological insulators,topological superconductors,and Dirac metals.Magnetic materials possess distinctive electron spin-splitting configurations,and varying spin strengths induce disparate impacts on the intermediate equilibrium adsorption capability.Rare earth materials have unique f-electron roaming properties,broad atomic radius,and f-orbital configurations,which typically confer notable advantages in oxygen reduction reactions.Furthermore,the catalytic performance exhibits significant differences under an external alternating electric,thermal,and magnetic field.These new materials show great potential in the re-functionalization of electrocatalytic materials and are expected to lead the development of the next generation of emerging energy materials.

关键词： electrocatalysis topological materials magnetic materials rare earth materials

Perspective for OER electrocatalysts:Lattice engineering of clay-like frameworks with near-surface cluster active sites

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Science China(Technological Sciences) 2024年第1期67卷 330-334页

作者： ZHANG DanTong QIAN BinBin XUE DongFeng Multiscale crystal materials research center Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China

Near-surface cluster active centers(NSCAC)are pivotal functional units in the catalysis of oxygen evolution reaction(OER),which exceeds the limitations imposed by the diverse coordination environments experienced in atomic and molecular active centers,thereby serving as an exceptional medium for exploring the dynamic catalytic processes of metal active sites[1,2].In the OER,the NSCAC primarily consist of the catalytic site and the first neighboring coordinating atoms.The investigation of NSCAC surpasses the exclusive reliance on the electron state regulation mechanism at the atomic level.

关键词： cluster centers exceptional

以LiB_(3)O_(5)为模板设计深紫外零级波片材料

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Science China materials 2024年第3期67卷 914-920页

作者：张志远徐蝶 Abudukadi Tudi 杨志华韩树娟潘世烈 Research Center for Crystal Materials State Key Laboratory of Functional Materials and Devices for Special Environmental ConditionsXinjiang Key Laboratory of Functional Crystal MaterialsXinjiang Technical Institute of Physics and ChemistryChinese Academy of SciencesUrumqi 830011China center of materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

以著名的LiB_(3)O_(5)为模板,通过增强其结构中B_(2)O_(5)的夹角使双折射更小,在封闭体系中通过高温溶液法获得了两种新的用于制造零级波片的双折射晶体Li_(2)MLaB_(18)O_(30)(M=Rb,Cs).有趣的是,相邻的B_(2)O_(5)接近垂直排列,使得它... 详细信息

以著名的LiB_(3)O_(5)为模板,通过增强其结构中B_(2)O_(5)的夹角使双折射更小,在封闭体系中通过高温溶液法获得了两种新的用于制造零级波片的双折射晶体Li_(2)MLaB_(18)O_(30)(M=Rb,Cs).有趣的是,相邻的B_(2)O_(5)接近垂直排列,使得它们表现出比商用石英晶体(Δn~0.0092在可见光区域)小得多的双折射率(分别为0.0032@532 nm和0.0027@532 nm).此外,Li_(2)MLaB_(18)O_(30)(M=Rb,Cs)晶体的紫外截止边均低于200 nm,表明它们可用作深紫外区域的零级波片材料.

关键词： tiny birefringence zero-order waveplate deep-ultraviolet region angle of B_(2)O_(5)

Perspective on perovskite materials as X-ray detectors

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Science China(Technological Sciences) 2022年第1期65卷 244-246页

作者： CHEN HuiWen LI YunLong XUE DongFeng Multiscale crystal materials research center Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China

X-ray imaging plays an important role in medical applications[1].Two available strategies are currently employed for X-ray detection,direct conversion and indirect conversion method(Figure 1).In the direct method,X-ra... 详细信息

关键词： Figure perovskite converted

Perspective on multiple degrees of freedom in crystal materials

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Science China(Technological Sciences) 2022年第11期65卷 2787-2789页

作者： SHI GuoQiang XUE DongFeng Multiscale crystal materials research center Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen518055China

Degrees of freedom describe the freedom of variables or values to vary within a specific material system.research on functional crystalline materials generally involves their preparation and growth to large-sized crystals,as well as the exploration of structure-property relationships[1,2].With the continuous research on the applications of functional crystalline materials in quantum science and technology.

关键词： crystalline sized freedom

New opportunities for ferroelectric deep-UV nonlinear optical crystals

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Science China materials 2024年第3期67卷 1004-1005页

作者： Miriding Mutailipu Shilie Pan Research Center for Crystal Materials Xinjiang Technical Institute of Physics and ChemistryChinese Academy of SciencesUrumqi 830011China center of materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

Deep-ultraviolet(deep-UV)light with the wavelength below200 nm is one of the most crucial elements of both laser-driven industrial and scientific applications in recent years[1].DeepUV light has been produced using a variety of techniques,such as gas discharge lamps,synchrotron radiation,excimer lasers,free electron lasers,and nonlinear frequency conversion.

关键词： nonlinear optical ferroelectric

非线性光学数据库:理论预测助力材料的快速发现

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Science China materials 2023年第11期66卷 4473-4479页

作者：谢聪伟吉洪诺夫·叶夫格尼储冬冬吴梦凡克鲁格洛夫·伊万潘世烈杨志华 Research Center for Crystal Materials CAS Key Laboratory of Functional Materials and Devices for Special EnvironmentsXinjiang Technical Institute of Physics&ChemistryCASUrumqi 830011China center of materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

现代激光技术迫切需要能够通过二次谐波产生相干光的非线性光学材料.然而,只有很少一部分非中心对称晶体材料的非线性光学性质被实验或者理论研究,针对高性能非线性光学晶体材料的探索仍非常有限.本工作建立了迄今为止最大的计算非线性... 详细信息

现代激光技术迫切需要能够通过二次谐波产生相干光的非线性光学材料.然而,只有很少一部分非中心对称晶体材料的非线性光学性质被实验或者理论研究,针对高性能非线性光学晶体材料的探索仍非常有限.本工作建立了迄今为止最大的计算非线性光学晶体材料数据库,其中包含2354个非中心对称晶体结构,以及它们的倍频系数和带隙.本文提供了理论数据的计算细节和其与实验数据的对比验证,以及数据库的详细描述.该数据库的重要特点之一是它包含大量通过进化算法搜索发现的新的热力学稳定和亚稳定结构,这为寻找具有更好性能的新型非线性光学材料提供了可能性.

关键词： materials database high-throughput computation second harmonic generation response NLO materials data-mining

LiAlS_(2):一种具有超宽带隙和高激光损伤阈值的潜在红外频率转换材料

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Science China materials 2023年第3期66卷 1189-1196页

作者：李广卯杨志华潘世烈 Research Center for Crystal Materials CAS Key Laboratory of Functional Materials and Devices for Special EnvironmentsXinjiang Technical Institute of Physics&ChemistryCASUrumqi 830011China Institution center of materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

具有宽带隙、高激光损伤阈值和无双光子吸收的红外非线性光学晶体材料在民用和军事领域具有许多重要应用.本工作通过系统的实验表征和全面的第一性原理研究了LiAlS_(2)晶体的综合光学性质.结果表明,LiAlS_(2)是一致熔融的晶体材料,在2.0... 详细信息

具有宽带隙、高激光损伤阈值和无双光子吸收的红外非线性光学晶体材料在民用和军事领域具有许多重要应用.本工作通过系统的实验表征和全面的第一性原理研究了LiAlS_(2)晶体的综合光学性质.结果表明,LiAlS_(2)是一致熔融的晶体材料,在2.09μm光源下能够实现Ⅰ类相位匹配,倍频效应(SHG)和有效SHG系数均为AgGaS_(2)的0.2倍;LiAlS_(2)具有目前红外非线性光学晶体材料中最宽的光学带隙,为5.13 eV,激光诱导损伤阈值约为AgGaS_(2)的28倍.此外,对其折射率色散关系的研究发现,LiAlS_(2)为正双轴晶体,最短相位匹配波长为1.98μm;结构-性能关系分析表明[AlS_(4)]四面体决定了其光学带隙,同时是材料SHG响应的主要贡献来源.以上结果表明,LiAlS_(2)是一种潜在的能够在高能激光系统中应用的红外非线性光学材料.

关键词：频率转换激光诱导损伤阈值倍频效应激光损伤阈值相位匹配双光子吸收晶体材料双轴晶体