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关键词： 超高压   压缩机   填料盘   材质分析   性能测试   材料化学   机械性能  

摘要： 本文主要对超高压压缩机填料盘的材料化学和机械性能进行了测试和研究分析

关键词： Equal-to 1   Crystal-structure   Solid-solution   Perovskite structure   Electrode materials   Nasicon structure   Manganese oxides   Batteries   Conductivity   Insertion  

摘要： Metal oxides containing mobile lithium ions are technologically important materials in the context of design and development of electrolytes and electrodes for solid-state lithium batteries. Mobility of lithium in a solid manifests itself in the following measureable ways: ionic conductivity/diffusion, redox insertion/deinsertion and ion exchange. While ionic conductivity and redox insertion/deinsertion determine the practical use of a material as an electrolyte and electrodes, respectively, ion exchange involving lithium in aqueous/molten salt media under mild conditions not only provides a convenient probe for the investigation of lithium mobility in solids, but also enables synthesis of new metastable phases. In this article, we present a chemical (rather than electrochemical) perspective of lithium ion mobility in inorganic oxide materials, in an attempt to bring out the relationships between structure and properties associated with lithium ion mobility. The survey shows that considerable lithium ion mobility occurs both in close-packed (rocksalt and its relatives, spinel, LiNbO3, rutile and perovskite) as well as open-framework (e. g. NASICON) oxide structures. LiCoO2 (alpha-NaFeO2), LiMn2O4 (spinel), LiNbO3/LiTaO3 (structure based on HCP array of anions), LiNbWO6 (trirutile) and (Li,La)TiO3 (perovskite) are some of the oxide materials (structure type indicated in parentheses) where high lithium mobility has been well established by various experimental studies. An investigation of the factors that control lithium ion conductivity in the (Li, La) TiO3 perovskite has enabled us to design new perovskite oxides in the Li-Sr-B-B'-O (B = Ti, Zr;B' = Nb, Ta) systems that exhibit high lithium ion mobility/conductivity. Among the framework materials, NASICON (e. g. Na3Zr2PSi2O12) turns out to be a versatile structure that supports high lithium mobility under ion-exchange, ionic conductivity and redox insertion/deinsertion conditions.

关键词： 材料化学工程   材料设计   面向应用过程  

摘要： 阐述了材料化学工程学科的特点、理论基础、研究内容与方法,综述了我国该学科的最新研究成果,提出了面向应用过程的材料设计理论与方法,展望了该学科的发展方向.

关键词： 中国科学院   福建物质结构研究所   物理研究   结构化学   材料化学   研究领域  

关键词： 教学改革   材料化学   分析化学   教学实践  

摘要： 本文介绍了上好材料化学专业"分析化学"实验课的探索、改革及实践效果。内容包括:设计系列实验,培养学生的实验兴趣,加强考核,处理好与理论课及其它实践环节的关系,强化综合实验等。通过这些具体改革和探索,既训练了学生的操作技能、动手能力,又培养了学生良好的实验习惯;取得了良好的实践效果,为材料化学专业的整体良性发展作出了很好的贡献。

关键词： Liquid crystals  

摘要： Take a spherical carbon 'buckyball', feather it with rod-like molecules, and the result is a distinctive shuttlecock shape that can easily be stacked into columns. Liquid-crystal phases thus formed should have unusual properties.

关键词： 稀土材料   稀土分离   重稀土   钇族元素   稀土族   国家重点实验室  

摘要： 作为我国稀土研究的重要基地,稀土材料化学及应用国家重点实验室走在了世界稀土科学研究的前沿。 稀土材料化学及应用国家重点实验室是在北京大学化学系稀土化学研究中心与无机化学教研室稀土发光材料组的基础上建立起来的。1989年3月通过专家论证,同年6月经国家计委批准列入世界银行贷款的“

关键词： 化学复合镀   无机类富勒烯   纳米材料   复合镀层   摩擦学性能   硫化钨   镍   磷  

摘要： 用化学复合镀技术制备了含有无机类富勒烯硫化钨纳米材料的Ni P (IF WS2 )复合镀层 .用环 -块摩擦实验测试了Ni P (IF WS2 )的摩擦学性能 .研究结果表明它比与Ni P ,Ni P (层状 2H WS2 )和Ni P 石墨复合镀层具有更高的耐磨性能和更低的摩擦系数 .分析了无机类富勒烯纳米材料改善镀层摩擦学性能的机理 .

关键词： Biomimetic materials   nanochemistry   Bionanotechnology   Figure   Hybrid materials   nanobiotechnology   Functional Materials  

摘要： Progress reports are a new type of article in Advanced Engineering Materials, dealing with the hottest current topics, and providing readers with a critically selected overview of important progress in these fields. It is not intended that the articles be comprehensive, but rather insightful, selective, critical, opinionated, and even visionary. We have approached scientists we believe are at the very forefront of these fields to contribute the articles, which will appear on an annual basis. The article below describes the latest advances in Bio-inspired Materials Chemistry.

关键词： Biocompatible materials   Biomimetic materials   Inorganic‐organic hybrid materials   Self‐assembly  

摘要： Progress reports are a new type of article in Advanced Materials, dealing with the hottest current topics, and providing readers with a critically selected overview of important progress in these fields. It is not intended that the articles be comprehensive, but rather insightful, selective, critical, opinionated, and even visionary. We have approached scientists we believe are at the very forefront of these fields to contribute the articles, which will appear on an annual basis. The article below describes the latest advances in bio-inspired materials chemistry.