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Cu过渡层对冷喷涂CuCrZr涂层性能的影响
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作者 王博 余敏 +1 位作者 吕培源 陈辉 《表面技术》 EI CAS CSCD 北大核心 2024年第17期196-201,共6页
目的针对冷喷涂CuCrZr涂层与CuCrZr板材在界面处的开裂问题,采用Cu涂层为过渡层,并探究Cu过渡层对CuCrZr涂层组织及性能的影响。方法采用高压氮气为工作气体,使用冷喷涂技术在CuCrZr基板上先制备一层Cu涂层打底,再继续喷涂多层CuCrZr涂... 目的针对冷喷涂CuCrZr涂层与CuCrZr板材在界面处的开裂问题,采用Cu涂层为过渡层,并探究Cu过渡层对CuCrZr涂层组织及性能的影响。方法采用高压氮气为工作气体,使用冷喷涂技术在CuCrZr基板上先制备一层Cu涂层打底,再继续喷涂多层CuCrZr涂层。通过金相显微镜、扫描电镜、显微硬度仪和激光热导仪,对涂层的组织和性能进行表征。结果Cu+CuCrZr涂层与基板界面结合良好,涂层的孔隙率约为0.624%,CuCrZr颗粒的扁平率为(43.62±4.54)%。Cu涂层的平均硬度约为153HV,冷喷涂CuCrZr涂层的平均硬度约为173HV。采用Cu涂层打底获得的CuCrZr涂层的热导率随温度的升高而升高,在500℃时与基体相当。结论Cu过渡层促进颗粒与基体之间发生良好结合,有效防止Cu CrZr涂层与CuCrZr板材开裂。采用Cu+CuCrZr涂层能满足CuCrZr结晶器力学与导热性能的要求。 展开更多
关键词 cuCrZr结晶器 冷喷涂 cu过渡层 导热性能
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团簇连接对Cu10Ag90快速凝固中晶体结构的影响
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作者 蒲元伟 梁永超 《原子与分子物理学报》 CAS 北大核心 2024年第1期71-80,共10页
快速凝固得到的晶体通常都会形成多种孪晶结构,但其成因一直是一个谜.本文采用分子动力学模拟Cu10Ag90合金在0、20和40 GPa压强下的快速凝固过程,分别形成了五重孪晶、层片状孪晶和复杂晶体,通过最大标准团簇方法(LaSCA)分析了短程有序... 快速凝固得到的晶体通常都会形成多种孪晶结构,但其成因一直是一个谜.本文采用分子动力学模拟Cu10Ag90合金在0、20和40 GPa压强下的快速凝固过程,分别形成了五重孪晶、层片状孪晶和复杂晶体,通过最大标准团簇方法(LaSCA)分析了短程有序结构的演变和晶体团簇之间的连接形式.结果发现,结晶转变温度Tc随着压强的增大而升高,平均原子势能也随之增加.非晶共有近邻子团簇(CNS)会在温度降至Tc时转变为晶体CNS,同时晶体团簇数量急剧增加,结构有序度提升.此外,通过分析晶体团簇之间的连接方式发现,五重孪晶中心团簇截边十面体(tDh)只能与具有相同S422的HCP相连形成五重孪晶轴;FCC与HCP有相同的S421,但只能以彼此的顶层或者底层原子作为彼此的中心原子连接形成层片状结构;BCC与FCC、HCP虽然没有共同的CNS,但是可以通过D-S6结构及其变形体连接,其连接方式的多样性是形成复杂晶体的主要原因.这些结果为研究晶体结构不同排列方式提供了新的理解. 展开更多
关键词 分子动力学模拟 cu-AG合金 晶体团簇连接 晶体排列
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Mo-Cu复合材料的电化学分离及钼酸钠制备
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作者 王涵睿 廖磊 +2 位作者 张伟哲 史智峰 郑学军 《中国钼业》 2024年第4期43-47,共5页
针对钼铜复合材料中钼铜的分离回收,提出了一种电化学溶解分离的方法,并制备得到高纯度的二水合钼酸钠。系统研究了工艺参数对整个钼铜复合材料电溶解过程的影响和二水合钼酸钠的制备与纯化。研究结果表明:阴极电流密度450 A/m^(2)、极... 针对钼铜复合材料中钼铜的分离回收,提出了一种电化学溶解分离的方法,并制备得到高纯度的二水合钼酸钠。系统研究了工艺参数对整个钼铜复合材料电溶解过程的影响和二水合钼酸钠的制备与纯化。研究结果表明:阴极电流密度450 A/m^(2)、极间距2 cm、NaOH初始浓度60 g/L时钼电溶解效果最好,7 d溶解率约90%。超声对钼电溶解无明显促进作用,但是能加速阳极原料中铜粉的脱落。电解母液通过蒸发结晶,并对晶体采用无水乙醇洗涤和重结晶的纯化工艺,可最终获得纯度达98.8%的二水合钼酸钠结晶,每公斤原料生产二水合钼酸钠约1.6 kg,满足工业标准。对比直接售卖钼铜复合废料,电化学回收废料毛利润约增加12.3万元/t。 展开更多
关键词 钼铜分离 电化学 二水合钼酸钠 超声 结晶
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3,5-二氯水杨醛缩-4-氨基安替比林Cu(Ⅱ)和Zn(Ⅱ)配合物的合成、晶体结构及抗肿瘤活性研究
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作者 王佳乐 苏武 +3 位作者 田文豪 张梦瑶 陆飘飘 李文戈 《长春师范大学学报》 2024年第2期186-195,共10页
利用3,5-二氯水杨醛与4-氨基安替比林,通过缩合反应,合成3,5-二氯水杨醛缩-4-氨基安替比林希夫碱配体(HL),配体与CuCl_(2)·2H_(2)O、Zn(Ac)_(2)·2H_(2)O,利用溶剂热反应合成两个新型的希夫碱配合物[CuL_(2)](配合物1)和[ZnL_(... 利用3,5-二氯水杨醛与4-氨基安替比林,通过缩合反应,合成3,5-二氯水杨醛缩-4-氨基安替比林希夫碱配体(HL),配体与CuCl_(2)·2H_(2)O、Zn(Ac)_(2)·2H_(2)O,利用溶剂热反应合成两个新型的希夫碱配合物[CuL_(2)](配合物1)和[ZnL_(2)](配合物2)。对合成的配合物进行了红外光谱、热重分析、PXRD表征,用X射线单晶衍射确定了配体(HL)、配合物1和配合物2的分子结构,单晶衍射分析结果表明,配体(HL)晶体属于单斜晶系,空间群为P2_(1)/n,配合物1晶体属于单斜晶系,空间群为C2/c,配合物2晶体属于单斜晶系,空间群为P2_(1)/c,配合物1是四配位的四方形结构,配合物2是扭曲的六配位的八面体结构。MTT法检测了配体(HL)及配合物对3种人体肿瘤细胞株(MDA-MB-231、CNE-2Z、A-549)体外抗肿瘤活性。检测结果显示,配合物对癌细胞的抑制作用明显比配体好,配合物1对MDA-MB-231细胞和CNE-2Z细胞抗增殖活性最好,其IC_(50)值分别为(1.215±0.07)μmol/L、(4.417±0.28)μmol/L均低于顺铂IC_(50)值,配合物2对A-549细胞和MDA-MB-231细胞也表现出较好的抗增殖活性。 展开更多
关键词 3 5-二氯水杨醛缩-4-氨基安替比林 cu(Ⅱ)配合物 Zn(Ⅱ)配合物 晶体结构 抗肿瘤活性
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基于KNSBN∶Cu晶体的光折变联合变换相关器 被引量:3
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作者 赵建林 许其推 +2 位作者 杨德兴 谢良平 杨东升 《光子学报》 EI CAS CSCD 北大核心 2002年第5期557-560,共4页
给出基于 KNSBN∶ Cu晶体的光折变二波耦合联合变换相关器 ( TBJTC) .以KNSBN∶ Cu晶体作为平方律转换器 ,将强度较大且携带参考图象和待识别图象联合频谱的信号光波与一强度较弱的相干平面参考光波同时输入于 KNSBN∶ Cu晶体 ,通过光... 给出基于 KNSBN∶ Cu晶体的光折变二波耦合联合变换相关器 ( TBJTC) .以KNSBN∶ Cu晶体作为平方律转换器 ,将强度较大且携带参考图象和待识别图象联合频谱的信号光波与一强度较弱的相干平面参考光波同时输入于 KNSBN∶ Cu晶体 ,通过光折变二波耦合过程的非线性能量转移 ,实现功率谱转换 ,进而实现相关识别 .理论分析和实验结果表明 ,除输入输出外 ,该光学相关器无需 CCD、L CLV等器件和相应的数字处理 ,是一个全光光学相关器 . 展开更多
关键词 联合变换相关器 光折变效应 二波耦合 knsbn:cu晶体 光学相关识别
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Cu∶KNSBN晶体自泵浦与互泵浦相位共轭共存特性的实验研究 被引量:12
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作者 许海平 石顺祥 +2 位作者 赵卫 陈利菊 孙艳玲 《光子学报》 EI CAS CSCD 北大核心 2002年第5期588-591,共4页
利用 Cu∶KNSBN晶体 ,研究了在两束泵浦光对称入射的条件下 ,自泵浦与互泵浦相位共轭共存时相互竞争和相互影响的特性 ,以及共存时的相位共轭特性与两束泵浦光的入射位置、入射夹角和泵浦比之间的关系 。
关键词 共存特性 实验研究 自泵浦相位共轭 互泵浦相位共轭 激光束 cu:knsbn晶体
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光折变KNSBN掺Cu晶体的生长 被引量:4
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作者 孙大亮 宋永远 +1 位作者 姜全忠 陈焕矗 《人工晶体学报》 EI CAS CSCD 1992年第2期110-113,共4页
用 Czochralski 技术生长了 A 位置非充满型 KNSBN 掺 Cu 晶体,提拉速度为4—8mm/h,转速为15—20r/min;沿提拉方向测量了温场分布,用氩离子激光器测量了晶体的高光折变性能。
关键词 晶体生长 knsbn 光折变 材料
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Cu:KNSBN晶体生长及其光折变效应的研究
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作者 荣宪伟 刘欣荣 +1 位作者 赵朝中 关承祥 《人工晶体学报》 EI CAS CSCD 北大核心 2006年第2期253-256,共4页
在KNSBN晶体中掺进CuO,采用硅钼棒作加热体,以Czochralsk i技术生长Cu:KNSBN晶体。以二波耦合光路,测试晶体的衍射效率和记录时间,计算折射率变化值Δn。Cu:KNSBN晶体的衍射效率,记录速度和折射率变化值皆高于Fe:L iNbO3晶体。尤其记录... 在KNSBN晶体中掺进CuO,采用硅钼棒作加热体,以Czochralsk i技术生长Cu:KNSBN晶体。以二波耦合光路,测试晶体的衍射效率和记录时间,计算折射率变化值Δn。Cu:KNSBN晶体的衍射效率,记录速度和折射率变化值皆高于Fe:L iNbO3晶体。尤其记录速度比Fe:L iNbO3晶体高一个数量级以上。测试Cu:KNSBN晶体位相共轭反射率R和自泵浦位相共轭反射率RC。Cu:KNSBN晶体的自泵浦位相共轭反射率RC值达到64%,是纯KNSBN晶体的二倍。以Cu:KNSBN晶体自泵浦位相共轭镜进行消畸变实验。实验结果表明:输出光波确系输入探测光波的位相共轭光波。 展开更多
关键词 cu:knsbn晶体 光折变效应 衍射效率
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Effects of crystallization on low-temperature specific heat capacity of Cu_(60)Zr_(20)Hf_(10)Ti_(10) bulk metallic glass
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作者 王志新 孙斌 卢金斌 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2011年第6期1309-1313,共5页
The specific heat capacities of Cu60Zr20Hfl0Til0 bulk metallic glass (BMG) and crystallized alloys were measured from 2 to 101 K. The effect of crystallization on the specific heat capacity of the BMG was studied. T... The specific heat capacities of Cu60Zr20Hfl0Til0 bulk metallic glass (BMG) and crystallized alloys were measured from 2 to 101 K. The effect of crystallization on the specific heat capacity of the BMG was studied. The effects of crystallization and the relationship between local modes and boson peak in the BMG were discussed. The specific heat capacity deviates from the simple Debye behaviors, showing the presence of local harmonic modes (Einstein oscillator) in the BMG and the crystallized alloy. Model calculation includes the contribution of one Debye mode and two Einstein modes for the BMG, one Debye mode and one Einstein mode for the crystallized alloy, showing an adequate description of the experimental data. 展开更多
关键词 cu60Zr20HfloTi10 BMG specific heat capacity crystalLIZATION
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同质异构Al-Cu-Mg系混晶粉末冶金制备新方法 被引量:1
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作者 于涛 李峰 +1 位作者 王野 李学问 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2023年第2期371-382,共12页
为突破传统同质粉末材料均以颗粒尺寸细化作为改性的单一途径禁锢,提出同质异构思想,即通过低能球磨将不同粒径的AA2024合金粉末按照一定比例混合,经热压烧结制备混晶坯料。研究结果表明,传统单一粒径粉末烧结后晶粒形貌趋向于不规则多... 为突破传统同质粉末材料均以颗粒尺寸细化作为改性的单一途径禁锢,提出同质异构思想,即通过低能球磨将不同粒径的AA2024合金粉末按照一定比例混合,经热压烧结制备混晶坯料。研究结果表明,传统单一粒径粉末烧结后晶粒形貌趋向于不规则多边形状,而不同粒径粉末混合烧结后晶粒形貌为小颗粒包覆大颗粒的结构形式;与前者相比,当粗粉占比为20%(质量分数)时,抗拉强度增加了38.8%;当粗粉占比为50%时,伸长率提高了14%。粉末混合后的烧结样品呈沿晶断裂和穿晶断裂的混合断裂机制,第二相对位错的钉扎效应更加明显,因此,合金性能得到显著提高。此研究工作为高性能同质异构混晶材料的制备提供了一种新思路。 展开更多
关键词 同质异构 AL-cu-MG合金 混晶 粉末冶金
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Synthesis, Crystal Structure and Electrochemical Properties of a One-dimensional Chain Coordination Polymer [Cu(phen)(2,4,6-TMBA)_2(H_2O)]_n 被引量:10
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作者 LI Wei LI Chang-Hong +1 位作者 YANG Ying-Qun KUANG Yun-Fei 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2008年第2期210-214,共5页
A one-dimensional chain coordination polymer [Cu(phen)(2,4,6-TMBA)2(H2O)]n has been synthesized by reacting 2,4,6-trimethyl-benzoic acid, 1,10-phenanthroline and Cu(Ⅱ) perchlorate and its structure was charac... A one-dimensional chain coordination polymer [Cu(phen)(2,4,6-TMBA)2(H2O)]n has been synthesized by reacting 2,4,6-trimethyl-benzoic acid, 1,10-phenanthroline and Cu(Ⅱ) perchlorate and its structure was characterized. Crystal data for this complex: tetragonal, space group I41, a = 2.0293(3), b = 2.0293(3), c = 1.3758(2) nm, α =β= γ = 90°, V= 5.6657(13) nm3, Dc= 1.379 g/cm3, Z = 8, μ(MoKa) = 0.815 mm-1, Mr = 588.14, F(000) = 2456, S = 1.047, R = 0.0459 and wR = 0.1053. The crystal structure shows that two neighboring Cu(Ⅱ) ions are linked together by one bridging-chelating 2,4,6-trimethyl-benzoic group, forming a one-dimensional chain structure. Each Cu(Ⅱ) ion is coordinated with two nitrogen atoms from one 1,10-phenanthroline molecule, three oxygen atoms from three 2,4,6-trimethyl-benzoic acid molecules and one oxygen atom from one water molecule, giving a six-coordinate distorted octahedral coordination geometry. The cyclic voltammetry behavior of the complex was also investigated. 展开更多
关键词 cu(Ⅱ) coordination polymer crystal structure electrochemical property analysis
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Synthesis,Crystal Structure and Properties of a Nanotubular Metal-organic Framework(MOFs) Based on Cu(Ⅱ) Oxide Chains and Benzenedicarboxylates 被引量:5
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作者 许文涛 陈莲 +1 位作者 江飞龙 洪茂椿 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2012年第3期321-326,共6页
A new cooper benzenedicarboxylate metal-organic coordination polymer,[Cu(μH2O)(BDC)]n·nDMF(1,H2BDC = 1,4-benzenedicarboxylate acid,DMF = N,N'-dimethylfor-mamide),has been successfully synthesized under hy... A new cooper benzenedicarboxylate metal-organic coordination polymer,[Cu(μH2O)(BDC)]n·nDMF(1,H2BDC = 1,4-benzenedicarboxylate acid,DMF = N,N'-dimethylfor-mamide),has been successfully synthesized under hydrothermal conditions and characterized by IR spectroscopy,elemental analysis,thermogravimetric analysis and single-crystal X-ray diffraction.This complex crystallizes in triclinic,space group P1 with a = 6.605,b = 10.44780(10),c = 11.0881(6) ,α = 62.064(11),β = 73.410(15),γ = 78.404(16)°,C11H13CuNO6,Mr = 318.76,V = 645.79(8) 3,Z = 2,Dc = 1.639 g/cm3,F(000) = 326,μ = 1.712 mm-1,the final R = 0.0362 and wR = 0.1330 for 2055 observed reflections with I 〉 2σ(I).The title compound contains infinite inorganic chains constructed by Cu oxygen octahedra by sharing corners and edges.Each chain is connected by BDC linkers to four other chains to form a three-dimensional framework with irregular rhombic channels where the DMF molecules are encapsulated. 展开更多
关键词 crystal structure cu(Ⅱ) complex benzenedicarboxylate nanotubule MOFS
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Hydrothermal Synthesis and Crystal Structure of a 1D Cu(II) Coordination Polymer: [Cu(bbpy)(H_2bptc)]_n Constructed by a Tetracarboxylic Acid 被引量:4
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作者 梅崇珍 单雯雯 刘秉涛 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2011年第8期1173-1177,共5页
The title compound [Cu(bbpy)(H2bptc)]n (bbpy = 4,4'-dimethyl-2,2'-bipyridine and H4bptc = 1,1'-biphenyl-2,2?,3,3'-tetracarboxylic acid) has been synthesized by hydrothermal reaction, and its structure was d... The title compound [Cu(bbpy)(H2bptc)]n (bbpy = 4,4'-dimethyl-2,2'-bipyridine and H4bptc = 1,1'-biphenyl-2,2?,3,3'-tetracarboxylic acid) has been synthesized by hydrothermal reaction, and its structure was determined by X-ray diffraction and characterized by elemental analysis, IR spectrum and thermogravimetric analysis. The crystal is of triclinic, space group P1 with a = 11.2831(12), b = 11.6718(13), c = 11.7771(13), α = 105.392(2), β = 108.382(2), γ = 112.397(2)o, CuC28H20N2O8, Mr = 576.00, V = 1222.4(2)3, Dc = 1.565 g/cm3, F(000) = 590, μ = 0.951 mm-1, S = 1.022 and Z = 2. The final refinement gave R = 0.0405 and wR = 0.1142 for 4270 observed reflections with I 2σ(I). The title complex has a 1D [Cu(bbpy)(H2bptc)]n chain structure, in which the extensive hydrogen-bond interactions make the chain more stable. The neighboring parallel chains are further packed into a 2D layer structure via π···π stacking interaction between the pyridine rings of bbpy ligands. Moreover, the adjacent layers are interconnected by the C–H···π interactions to form a 3D metal-organic framework. 展开更多
关键词 tetracarboxylic acid cu(Ⅱ) coordination polymer crystal structure
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Synthesis and Crystal Structure of the Binuclear Complex:[Cu_2(phen)_2(ip)(Hip)_2]·4H_2O 被引量:2
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作者 SUN Ya-Guang GU Xiao-Fu GAO En-Jun REN Ling ZHANG Dong-Sheng XU Jie 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2007年第2期157-160,共4页
A binuclear complex [Cu2(phen)2(ip)(Hip)2].4H2O has been synthesized by the reaction of Cu(CH3COO)2.H2O, phen(1,10-phenanthroline) and isophthalic acid (H2ip) under hydrothermal condition. Elemental analys... A binuclear complex [Cu2(phen)2(ip)(Hip)2].4H2O has been synthesized by the reaction of Cu(CH3COO)2.H2O, phen(1,10-phenanthroline) and isophthalic acid (H2ip) under hydrothermal condition. Elemental analysis, IR spectra and X-ray single-crystal diffraction were carded out to determine the composition and crystal structure. Crystal data for this complex: monoclinic, space group C2/c, a = 19.214(3), b = 10.6973(14), c = 22.567(3) A, β = 105.081(2)°, C24H19N2O8Cu, Mr= 526.95, Z = 8, F(000) = 2160, V= 4478.6(10) A3, Dc = 1.563 g/cm^3,μ = 1.030 mm^-1, -24≤h≤ 16, -13≤k≤13, -28≤l≤28, R = 0.0369 and wR = 0.0819 for 4615 (Rint = 1.0357) independent reflections and 3290 observed ones (I 〉 2σ(I)). Structural analysis shows that coordination geometry of Cu( Ⅱ ) is a planar square, and the title complex exhibits a 2-D framework supramolecular structure by hydrogen bonds and π-π stacking interactions. 展开更多
关键词 cu(Ⅱ) crystal structure isophthalic acid SUPRAMOLEcuLE
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Crystallization Growth of Single Crystal Cu by Continuous Casting 被引量:2
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作者 Zhenming XU and Jianguo LI (School of Materials Science and Engineering, Shanghai Jiaotong University, Shanghai 200030, China) Hengzhi FU (State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China) 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2000年第3期345-347,共3页
Crystallization growth of single-crystal Cu by continuous casting has been investigated using self-designed horizontal continuous casting equipment and XRD. Experimental results showed that the crystallization plane o... Crystallization growth of single-crystal Cu by continuous casting has been investigated using self-designed horizontal continuous casting equipment and XRD. Experimental results showed that the crystallization plane of (311), (220) and (ill) were eliminated sequentially in evolutionary process. The final growth plane of crystal was (200), the direction of crystallization was [100], the growth direction of both sides of the rod inclined to axis, and the degree of deviation of direction [100] from the crystal axis was less than 10°. In order to produce high quality single crystal, the solid-liquid interface morphology must be smooth, even be planar. 展开更多
关键词 crystallization Growth of Single crystal cu by Continuous Casting cu
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Hydrothermal Syntheses, Crystal Structures and Luminescence Properties of Cu(Ⅱ) and Cd(Ⅱ) Complexes Assembled by 6-Hydroxypicolinic Acid and 1,10-Phenanthroline 被引量:1
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作者 YU You-Zhu CHANG Song-Yang +4 位作者 HAN Xi CHEN Guang-Xin XUAN Ya-Wei WU Xian-Li WANG Fang 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2019年第4期651-659,共9页
Two new complexes based on 6-hydroxypicolinic acid(H_2picO) and 1,10-phenanthroline(phen), such as [Cu_4(picO)_4(phen)_4]·12 H_2O(1) and {[Cd_4(picO)_4(phen)_4(H_2O)_2]·5H_2O}_n(2), have been synthesized and... Two new complexes based on 6-hydroxypicolinic acid(H_2picO) and 1,10-phenanthroline(phen), such as [Cu_4(picO)_4(phen)_4]·12 H_2O(1) and {[Cd_4(picO)_4(phen)_4(H_2O)_2]·5H_2O}_n(2), have been synthesized and characterized by IR, elemental analyses, thermogravimetric analyses and X-ray diffraction technique. Single-crystal X-ray diffraction analyses revealed that the two complexes both crystallize in the triclinic system, space group P(16)-. For complex 1, the picO ligands adopt a tridentate coordination mode to link copper(Ⅱ) ions into dimmers. PicO ligands also adopt a tridentate mode in complex 2, which connects the cadmium(Ⅱ) to form a one-dimensional chain. Moreover, luminescent properties of 1 and 2 were also investigated. 展开更多
关键词 cu(Ⅱ) and Cd(Ⅱ) COMPLEXES 6-hydroxypicolinic acid crystal structures luminescent properties
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Synthesis and Crystal Structure of a Dinuclear Cu(II) Complex with Tridentate Schiff Base and Azido Bridge 被引量:1
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作者 LINHong FENGYunLong GAOShan 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2005年第4期375-378,共4页
A new dinuclear copper(II) complex ([Cu(C12H17N2O)(N3)]2, C24H34Cu2N10O2) has been synthesized and characterized by X-ray structure determination. It crystallizes in the monoclinic system, space group P21/c with a =... A new dinuclear copper(II) complex ([Cu(C12H17N2O)(N3)]2, C24H34Cu2N10O2) has been synthesized and characterized by X-ray structure determination. It crystallizes in the monoclinic system, space group P21/c with a = 18.529(4), b = 10.933(2), c = 14.534(3) ?, β = 111.07(3)°, V = 2748(1) ?3, Z = 4, Mr = 621.69, F(000) = 1288, Dc = 1.503 g/cm3 and μ(MoKα) = 1.590 mm?1. The structure was refined to R = 0.0647 and wR = 0.1846 for 4406 observed reflections (I > 2σ(I)). The asymmetric unit comprises two halfmolecules. The complex is a centrosymmetric dimmer in which the copper atoms are penta-coordinated by three coordination atoms from the corresponding tridentate Schiff base ligand and two bridging azide anions. The Cu(II)…Cu(II) average distance is 3.350(1) ?. 展开更多
关键词 dimethylamino-1-propylamine SALICYLALDEHYDE Schiff base cu(II) complex crystal structure bridging azide
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Synthesis,Crystal Structure and Photoluminescence of a Cuprous Dimer with Tetrakis(pyrazol-i-yl)borate Linker 被引量:1
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作者 康丽菊 陈进 +3 位作者 滕腾 陈旭林 余荣民 卢灿忠 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2015年第11期1761-1767,共7页
A cuprous dimer [Cu(POP)]2(pz4B)BF4·(CH3CN)3 (1, POP = bis(2-(diphenylphosphanyl)phenyl)ether, pz4B- = tetrakis(pyrazol-i-yl)borate anion) was synthesized from the reaction of Cu(CH3CN)4BF4, POP a... A cuprous dimer [Cu(POP)]2(pz4B)BF4·(CH3CN)3 (1, POP = bis(2-(diphenylphosphanyl)phenyl)ether, pz4B- = tetrakis(pyrazol-i-yl)borate anion) was synthesized from the reaction of Cu(CH3CN)4BF4, POP and Kpz4B in CH3CN at room temperature. The compound was characterized by elemental analysis and X-ray single-Crystal structure analysis. It crystallizes in monoclinic, space group P21/c with a = 12.3491(2), b = 20.8845(3), c = 33.0657(4) A, β = 94.251(1)°, V = 8504.3(2) A3, Z = 4, Mr = 1693.21, Dc = 1.322 g/cm3, F(000) = 3496,μ = 1.843 mm-1, GOOF = 1.031, the final R = 0.0442 and wR = 0.1235 for 14397 observed reflections with 1〉 2σ(I). 1 is an ionic compound. It is composed of a BF4- anion and a {[Cu(POP)]2(pz4B)}+ cation. The cation contains two [Cu(POP)]+ cationic moieties and a pz4B- anionic linker. The Cu(I) ions show a distorted tetrahedral coordination geometry defined by two nitrogen atoms from a pz4B- bridging ligand and two phosphorous atoms from a POP terminal chelating ligand. The complex emits blue luminescence with the maximum peak at 457 nm with 3% quantum yield in solid state at room temperature. The Cu(I) centers are essentially electronically separated because both HOMO and LUMO contain very little contribution from the bridging ligand. The unexpected low emission is ascribed to the intramolecular interaction of the emissive centers. 展开更多
关键词 binuclear cu(Ⅰ) complex crystal structure emissive property DFT calculation
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Liquid State Undercoolability and Crystal Growth Kinetics of Ternary Ni-Cu-Sn Alloys 被引量:2
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作者 闫娜 胡亮 +2 位作者 阮莹 王伟丽 魏炳波 《Chinese Physics Letters》 SCIE CAS CSCD 2016年第10期141-144,共4页
The liquid state undercoolability and crystal growth kinetics of ternary Ni-5%Cu-5%Sn and Ni-10%Cu-10%Sn alloys are investigated by the glass fluxing method. In these two alloys, experimental maximum undercoolings of ... The liquid state undercoolability and crystal growth kinetics of ternary Ni-5%Cu-5%Sn and Ni-10%Cu-10%Sn alloys are investigated by the glass fluxing method. In these two alloys, experimental maximum undercoolings of 304 K (0.18TL ) and 286K (0.17TL ) are achieved and the dendritic growth velocities attain 39.8 and 25.1 m/s, respectively. The transition of morphology from coarse dendrite into equiaxed structure occurs and the grain size of the a (Ni) phase decreases remarkably when the undercooling increases. Both the lattice constant and microhardness increase obviously with the enhancement of undercooling. The enrichment of Cu and Sn solute contents reduces the dendritic growth velocity, while enhances the lattice constant and microhardness of a (Ni) phase. 展开更多
关键词 SN of cu Liquid State Undercoolability and crystal Growth Kinetics of Ternary Ni-cu-Sn Alloys NI
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Isochronal and isothermal crystallization in Zr_(55)Cu_(30)Ni_5Al_(10) bulk metallic glass 被引量:2
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作者 J.C.QIAO J.M.PELLETIER 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2012年第3期577-584,共8页
Non-isothermal crystallization transformation kinetics and isothermal crystallization kinetics in super-cooled liquid region(SLR) in Zr55Cu30Ni5Al10 bulk metallic glasses were studied by differential scanning calori... Non-isothermal crystallization transformation kinetics and isothermal crystallization kinetics in super-cooled liquid region(SLR) in Zr55Cu30Ni5Al10 bulk metallic glasses were studied by differential scanning calorimetry(DSC) and X-ray diffraction(XRD).In isochronal mode,the average values of activation energy in Zr55Cu30Ni5Al10 bulk metallic glass determined by different models(Kissinger method,Flynn-Wall-Ozawa method and Augis-Bennett method) are in good agreement with each other.In addition,the isothermal transformation kinetics in Zr55Cu30Ni5Al10 bulk metallic glasses was described by the Johnson-Mehl-Avrami(JMA) model.For Zr55Cu30Ni5Al10 bulk metallic glass,the Avrami exponent n ranges from 2.2 to 2.9,indicating that crystallization mechanism in the bulk metallic glass was mainly diffusion-controlled;crystal growth is controlled by long range ordering diffusion in three-dimensional growth during isothermal crystallization process.The average value of activation energy in Zr55Cu30Ni5Al10 bulk metallic glass is 469 kJ/mol in isothermal transformation process. 展开更多
关键词 Zr55cu30Ni5Al10 metallic glass thermal analysis crystallization kinetics Avrami exponent
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