Synthesis and luminescence properties of rare earth ternary complexes consisting of Tb（Ⅲ）, β-diketones and 1,10-phenanthroline （phen）

In order to study the luminescent properties of ternary rare earth complexes with β-diketone ligand, three new β-diketone ligands, 1-phenyl-3-(p-phenylethynylphenyl)-1,3-propanedione(HPPP), 1-(2-thienyl)-3-(p-phenylethynylphenyl)-1,3-propanedione (HTPP) and 1-(2-furyl)-3-(p-phenylethynylphenyl)-1,3-propanedione (HFPP), were synthesized by Sonogashira coupling reaction and Claisen condensa- tion. Three new ternary rare earth complexes, TbL3phen (L = PPP, TPP, or FPP), were synthesized by the reaction of rare earth chloride TbCl3,1,10-phenanthroline (phen) with HPPP, HTPP, or HFPP respectively, in alcohol solution. The compositions were characterized by means of elemental analysis, chemical analysis, and IR spectra. Luminescent properties of the three new complexes have been studied. The results show that the ternary Tb(III) complexes only emit the weak fluorescence of the Tb(III) ion, which reveals the triplet state energy of the ligands does not match well with the excited state vibrating energy of Tb3 ion.     

小浪底水电站水轮机抗磨蚀技术措施

小浪底水电站存在过机水流含沙量高和水头变化幅度大的双重技术难题。为减轻高含沙水流水对水轮机过流部年的严重磨蚀破坏，确保组安全正常运行在水轮机的参数选择，结构设计防护措施等方面采了综合治理措施。     

情绪与经济理论

认为可以在一般的意义上把情绪融入经济学的理由有,情绪可能是决策理性的一个来源;情绪本身能成为理性选择的对象;情绪可以模型化.     

Synthesis and luminescence properties of rare earth ternary complexes consisting of Tb(III), β-diketones and 1,10-phenanthroline (phen)

In order to study the luminescent properties of ternary rare earth complexes with β-diketone ligand, three new β-diketone ligands, 1-phenyl-3-(p-phenylethynylphenyl)-1,3-propanedione(HPPP), 1-(2-thienyl)-3-(p-phenylethynylphenyl)-1,3-propanedione (HTPP) and 1-(2-furyl)-3-(p-phenylethynylphenyl)-1,3-propanedione (HFPP), were synthesized by Sonogashira coupling reaction and Claisen condensation. Three new ternary rare earth complexes, TbL₃phen (L = PPP, TPP, or FPP), were synthesized by the reaction of rare earth chloride TbCl₃,1,10-phenanthroline (phen) with HPPP, HTPP, or HFPP respectively, in alcohol solution. The compositions were characterized by means of elemental analysis, chemical analysis, and IR spectra. Luminescent properties of the three new complexes have been studied. The results show that the ternary Tb(III) complexes only emit the weak fluorescence of the Tb(III) ion, which reveals the triplet state energy of the ligands does not match well with the excited state vibrating energy of Tb³⁺ ion.     

Preparation and Dynamic Mechanical Properties at Elevated Temperatures of a Tungsten/Glass Composite

Experiments were conducted to prepare a borosilicate glass matrix composite containing 50 vol.% tungsten and examine its dynamic compressive behavior at elevated temperatures in the range of 450-775 °C. The results show that the homogenous microstructure of the tungsten/glass composite with relative density of ~ 97% can be obtained by hot-pressing sintering at 800 °C for 1 h under pressure of 30 MPa. Dynamic compressive testing was carried out by a separate Hopkinson pressure bar system with a synchronous device. The results show that the peak stress decreases and the composite transforms from brittle to ductile in nature with testing temperature increasing from 450 to 750 °C. The brittle–ductile transition temperature is about 500 °C. Over 775 °C, the composite loses load-bearing capacity totally because of the excessive softening of the glass phase. In addition, the deformation and failure mechanism were analyzed.     

渠式切割装配式地下连续墙受力性状研究

渠式切割装配式地下连续墙(Trench cutting Assembled Diaphragm wall,TAD)具有绿色环保、施工效率高及环境扰动微小等特征,是近年研发的一种新型支护方式.在杭州市某原位试验场地,测定了开挖过程中该新型围护结构的工作性状.实测结果结合Plaxis-3D软件数值分析后发现,随着开挖深度的增加,墙体位移和弯矩不断增大,围护结构最大位移点下移,直至开挖面附近;围护结构顶端弯矩取决于顶部连接方式,当顶部连接方式为混凝土顶板时,围护结构整体工作性能更好;水泥土墙的厚度和强度对墙体影响较小.结果表明,渠式切割装配式地下连续墙具备适用性,可替代传统地下连续墙与止水帷幕组合结构,并可配合盖板暗挖法用于地下管廊建设.     

R406a应用于中高温热泵热水器的性能研究

为了研究非共沸混合制冷剂R406a应用于中高温热泵热水器的性能,对R406a和R22两种工质的基本物性进行对比分析,并将R406a热泵热水机组放在房间热平衡室内进行试验。在环境温度20℃,机组最终出水温度75℃条件下,对机组进行测试,研究机组的循环性能、排气压力和排气温度。实验结果表明,R406a相比于R22热泵热水器在制取高温热水时,具有相对较低的排气温度和排气压力。在系统出水温度为75℃时,系统的排气温度和排气压力均在安全运行范围以内,且系统COP为2.26。     

铅锌尾矿膏体缓凝研究及控制措施

尾矿膏体充填技术已在国内外诸多矿山得到推广应用,相关科研单位及矿山企业在膏体充填材料、级配、流变特性、胶结材料等方面开展了大量研究工作,但对膏体缓凝机理及控制措施方面的研究很少。通过对胶结剂性质、原矿性质、尾矿药剂残留、尾矿特性等方面进行分析,开展胶结剂初凝及安定性分析、尾矿粒级分析、X射线衍射分析、元素化学物相分析、MLA分析、扫描电镜分析等工作,找到了导致充填体缓凝的原因,并提出相应的解决措施。相关研究及认识给国内外采用尾矿膏体充填的硫化矿采选企业确保膏体质量提供了借鉴和参考,避免膏体缓凝发生。     

Al基非晶合金原位TEM拉伸塑性形变研究

为探究Al基非晶合金小尺度变形行为,首次用热双金属片拉伸装置实现Al86Ni7Er5Co1La1非晶合金纳米线原位TEM拉伸观察.结果表明:Al86Ni7Er5Co1La1非晶合金纳米线室温下表现出明显尺寸效应,拉伸断裂应变高达14.6％;选区电子衍射分析表明,该成分非晶合金纳米线在变形过程中始终保持非晶状态,未发生形变诱发纳米晶现象.     

硝酸铵钙的生产技术

叙述了硝酸铵钙的物化性能。阐述了国内2种硝酸铵钙产品——氨化硝酸钙和硝酸铵钙的生产方法以及生产技术的发展方向。