Single crystal growth and characterization of LaLuO3

Wide shoulder and fast lateral growth are characteristics of LaLuO₃ during crystallization onto an iridium rod in Czochralski's configuration. Under careful temperature control, necking in and further low-speed pulling provided for single-crystal growth, but spontaneous separation of the growing crystal from the melt is a strongly limiting factor for production of large boules. Ce- and Pr-doped single crystals of up to 0.5 cm³ were obtained and used in measurements of the X-ray data, density, melting point and optical properties and in annealing studies.     

La2Zr2O7 films on Cu–Ni alloy by chemical solution deposition process

Films of La₂Zr₂O₇ (=LZO) have been formed by chemical solution deposition technique (CSD) on new bi-axially textured Cu–Ni alloy tapes based on rolled constantan (Cu₅₅Ni₄₅) Rabits. The precursor used was acetylacetonates treated in propionic acid (0.1–0.87 mol/l) and then deposited by spin-coating. The LZO film starts to crystallize above 850 °C, the film nucleates bi-axially textured on the substrate (with unit cell axis rotated 45° from those of the substrate). The top part of the film is not textured even after long annealing time at 1100 °C, but the interfacial part is bi-axially textured. Thus, synthesis of bi-axially textured films on Cu₅₅Ni₄₅ Rabits seems possible but more works are needed to optimize its properties.     

含镧ZA12和ZA27合金相变过程的DSC分析

用差示扫描量热分析（ＤＳＣ）研究了Ｌａ对ＺＡ１２和ＺＡ２７铸态合金加热及冷却相变的影响。结果表明，ＺＡ１２中含０．４％Ｌａ，使合金的凝固温度区间减小，共析转变温度降低，共析转变热增大，表明Ｌａ抑制其共析相变。ＺＡ２７中含０．４％Ｌａ，使合金的凝固温度区间增宽和凝固潜热增加，并使冷却过程中的共晶转变出现双峰，这可能是因为ε相提前析出的缘故。     

Rare Earth Complexes of Aminopolycarboxylic Acid Ⅱ.Synthesis and Structure of Lanthanum Complex of Dipicolinic Acid

Complexes of the general formula,(Me_4N)_2[(Ln(HDPA)_2(DPA)]·Cl,have been synthesized,whereLn=La,Ce,Pr,Nd,Sm and H_2DPA=dipicolinic acid.Among them,the crystal structure of the La complexhas been determined by a four-circle X-ray diffractometer to a final R value of 0.080.The crystal isorthorhombic,space group Pccn with a=1.0321(1),b=1.4951(2),c=2.0766(6)nm,V=3.2044(9)nm~3,andZ=4.The rare earth ion is nine coordinated to forming a tortuous tricapped trigonal prism.     

Transport Behaviour of La~（3＋） with Flat－Sheet－Sandwich Supported Liquid Membrane Extraction System

ＴｒａｎｓｐｏｒｔＢｅｈａｖｉｏｕｒｏｆ Ｌａ~（３＋） ｗｉｔｈ Ｆｌａｔ－Ｓｈｅｅｔ－ＳａｎｄｗｉｃｈＳｕｐｐｏｒｔｅｄ ＬｉｑｕｉｄＭｅｍｂｒａｎｅＥｘｔｒａｃｔｉｏｎＳｙｓｔｅｍＹｉＴａｏ（易涛）；ＹａｎＣｈｕｎｈｕａ（严纯华）；ＬｉＢｉａｏｇｕ?..     

Effect of La~（3＋） and Ca~（2＋） on ＂Ion－Gate＂ of Glutathione Monolayer Gold Electrode

ＥｆｆｅｃｔｏｆＬａ~（３＋）ａｎｄＣａ~（２＋）ｏｎ＂Ｉｏｎ－Ｇａｔｅ＂ｏｆＧｌｕｔａｔｈｉｏｎｅＭｏｎｏｌａｙｅｒＧｏｌｄＥｌｅｃｔｒｏｄｅＪｉａｎｇＺｉｗｅｉ（江子伟）；ＸｉｎＷｅｎｋｕａｎ（辛文宽）；ＺｈｕＷｅｎｙｕ（朱文育）；ＧａｏＸｉａｏｘ...     

Studies on a surface acoustic wave (SAW) dosimeter sensor for organophosphorous nerve agents

As a follow-up of previous work on a Surface Acoustic Wave (SAW) sensor for nerve agents, irreversible response effects have been studied in more detail. Surface analytical studies indicated that degradation products are responsible for the effects observed. In addition it was tried to explore these effects for the development of a nerve agent dosimeter. Experiments were conducted to test the performance of a SAW sensor coated with La(III) 2-bis(carboxymethyl)amino hexadecanoic acid. The experiments revealed that many improvements must be made especially with respect to sensitivity and linear response behaviour.     

镧元素对钨钴硬质合金的影响

通过正交设计实验方法分析了合金元素对钨钴硬质合金YG6性能的影响规律。结果表明镧元素能同时提高YG6硬质合金抗弯强度11％,HRA.硬度值0.2.计算确定出制备过程的最优工艺参数为:烧结温度在1396～1410℃,镧含量在0.92％～1.04％范围内。镧元素对结构的影响表现为:细化WC晶粒。     

硝酸体系中锕的三烷基氧膦萃取

本文研究了TRPO-煤油对硝酸体系中的锕的萃取,确定了萃取络合物的组成;测定了表观平衡常数;并研究了各种因素对Ac的萃取的影响。在实验基础上推导出了计算Ac的分配比的经验公式。还研究了TRPO-煤油对常量La的萃取,并讨论了使用TRPO萃取实现La,Ac分离的可能性。     

以D2EHPA为载体的中空纤维丝液膜提取镧

本文以液膜法提取稀土获得基础知识为目的,以二(2-乙基己基)磷酸(D2EHPA)为载体,用中空纤维丝液膜提取稀土金属镧。测定了流量随时间的变化以及外水相的酸浓度、镧浓度、载体浓度对膜传质速度的影响,并利用传质速度方程式对实验结果给予定量解释。