Preparation and Characterization of Er2O3 Nanocrystals by Schiff Base Salt Combustion Method

The nanocrystals Er2O3 were prepared by using a combustion method with Schiff base as a chelating agent. The Er(Ⅲ) coordanation compound of Schiff base, obtained from erbium nitrate and retinal Schiff base, underwent a combustion process and voluminous ashes formed when calcimining the complex in air. Pure cubic Er2O3 nanocrystals with a diameter of 13nm were produced. The nanocrystals were homogeneous and rigid coacervation was not observed. The photoluminescence emission spectrum of the erbium (Ⅲ) oxide nanocrystals shows that it has a characteristic peak at 1.54μm, and some other shoulder peaks appear on both sides of the main peak.     

纳米技术与纳米材料

介绍了纳米技术与纳米材料的发展与应用,指出了纳米技术带给我国的机遇。     

Preparation and Fluorescence Properties of TiO2 ：Eu Nano-Materials

A series of europium-doped titanium dioxide (TiO2) fluorescent nano-materials prepared by sol-gel method is presented. The phase structure and crystalline sizes of TiO2:Eu, which is doped with different europium content and then heat-treated at different temperature, were investigated by XRD ,TG, DTA and TEM. The results show that europium could be introduced into TiO2 under high temperature and it can suppress the structural phase transition from anatase to rutile and the crystal growth of TiO2 in TiO2:Eu nano-materials. The fluorescence spectra were examined by fluorescence spectrophotometer, and the results show that the fluorescence intensity is the strongest when europium content is 2.68% (molefraction) and the heat-treated temperature is 700℃. From the measurement results of the fluorescence lifetimes, it can be seen that the fluorescence lifetime could be prolonged when europium is incorporated in TiO2.     

稀土纳米材料及应用(Ⅰ)

综述了稀土材料和纳米技术相结合所产生的材料性能优势，并着重介绍了稀土纳米材料的研发与应用现状。     

钼纳米技术的研究与发展动态

介绍了钼纳米技术的研究与发展动态，如纳米级二硫化钼、三氧化钼、钼酸盐等。     

纳米材料及其技术的评述

简要介绍了纳米材料及纳米技术的基本概念，并重点综述了纳米材料和纳米技术在各个领域的，指出纳米指标和纳米技术必将对生产力的发展产生深远的影响。     

纳米氧化铁的制备方法及进展

本文简要介绍了纳米氧化铁的种类、性质及用途,重点论述了纳米氧化铁的制备方法及其进展。     

纳米技术—二十一世纪新产品诞生的源泉

本文主要论述了纳米概念，纳米技术的发展对人类社会进步的重要性，世界各国以及中国在纳米领域里的发展规划及产业化状况，我院在纳米技术研究方面所取得的一些进展。     

“稀土功能材料进展”研讨会在江苏宜兴召开

为了深入学习贯彻2003年全国稀土办公室主任会议精神，交流国内外稀土功能材料应用及进展方面的信息，深入分析制约我国稀土功能材料发展的不利因素，找出推动我国稀土在高新产品发展，延伸稀土产业链的战略对策，加快稀土产品结构调整和企业重组的步伐，以促进我国稀土产业尽快走出     

Synthesis of Ti-Ce-Si Binary and Ternary Nanocomposite Photocatalyst by Supercritical Fluid Drying Technology

Recently,photodegratation of various organiccontaminants with powdered semiconductors as cata-lysts has received much attention for their potential inthe utilization of light energy.TiO2is one of the mostwidely used photocatalysts due toits relatively nontox-ic,high activity,strong oxidizing property,and excel-lent stability.However,some weaknesses such as poormechanic strength,compressive strength and thermalstability have li mited its industrial applications.Therefore,it is necessary to i mp…     

新型抗菌剂——纳米TiO2的研究进展

1前言随着科学技术的突飞猛进和人们生活水平的提高，对水处理装置、食品包装、卫生日用品（抗菌地砖、抗菌陶瓷卫生设施）、抗菌性内衣、内裤、鞋袜材料、抗菌性餐具和切菜板、抗菌地毯以及建筑用抗菌砂浆、抗菌涂料、抗菌不锈钢板、铝板等制做的电冰箱、食品器具及医院设备等耐用消费品的抗菌性有了较高的要求，添加抗菌剂，防止微生物繁殖的商品的开发受到青睐．目前日本、美国、德国等发达国家在这方面已取得飞速的发展，我国也正处于开发研究之中．2抗菌性材料的类型与选择2．l抗菌剂的分类抗菌剂的种类繁多，性能各异，分类方法也不同…     

铸型尼龙改性的研究进展

铸型尼龙产品广泛地用于各种机械零件，改性后的铸型尼龙，可克服其自身的缺点，满足工业应用的要求。文章就我国近年来在铸型尼龙改性研究方面的情况及不同的改性方法做了详细的介绍。     

纳米科技--21世纪的机遇与挑战

纳米科技是近年来发展迅速、多学科交叉的前沿高科技领域，对人类生产和生活方式特产生广泛而深刻的影响。因此，纳米科技的兴起和发展，将奠定21世纪社会和经济可持续发展的重要基础。钢铁研究总院从事纳米材料的研究开发已有30余年的历史，在纳米金属材料领域已经形成综合优势。全面正确地认识纳米科技，明确未来发展方向，对促进材料科学和材料产业的快速发展至关重要。本文阐述了纳米科技的有关概念和内涵，简要分析了国内外发展态势，介绍了所涉及的主要研究领域，并对今后发展方向和应该着重解决的问题进行了初步讨论。     

金属基纳米复合材料研究进展

从纳米复合材料的概念、分类以及设计原则等几方面对纳米复合材料进行了较全面的介绍，并综合评述了几种最新的金属基纳米复合材料的研究进展。     

金属基纳米复合材料研究进展

从纳米复合材料的概念，分类以及设计原则等几方面对纳米复合材料进行较全面的介绍，并综合评述了几种常见的金属基纳米复合材料的研究进展。     

稀土纳米材料及应用(Ⅱ)

综述了稀土材料和纳米技术相结合所产生的材料性能优势，并着重介绍了稀土纳米材料的研发与应用现状。     

Structure and Electrorheological Performance of Nanosized Y2O3-Doped TiO2 Particle Materials

The nanosized particle materials of doped-TiO2 with Y2O3 were prepared by means of sol-gel technique for use in electrorheological (ER) fluids, and their crystal structures were measured by X-ray diffraction (XRD) analysis. To compare with the pure TiO2, a distinct enhancement in the shear stress under dc electric field was found by using such materials. This can be explained by the increase of the dielectric loss and dielectric constant at low frequency. The effects of the crystal structure of the particles on the dielectric property and ER performance of materials were investigated.     

Hydrothermal Synthesis of Nanostructural LaxBi2-xSeyTe3-y Powders

Nanostructural monophase LaxBi2-xSeyTe3-y alloy was synthesized with a hydrothermal route using BiCl3, LaCl3, selenium and tellurium powders as the precursors, NaOH and disodium ethylenediaminetetraacetiate （EDTA） as the additives. The hydrothermally synthesized powders have a petal-like morphology self-structured by the parallel side-by-side arrangement of the nano-scales. It is found that an alkaline additive is necessary for the synthesis of a monophase Bi2Te3 based alloy.     

纳米铜粉的制备研究

本文研究了化学还原法制各纳米铜粉的方法。本实验以次磷酸钠为制备纳米铜粉的还原剂。实验得出其较佳工艺条件： pH值在1．5—2．0之间，温度60℃左右，高速搅拌，反应时间15—20min，硫酸铜溶液中的Cu^ 2被还原为紫红色粉末。对所得产品进行XRD谱图分析，证实紫红色粉末为铜粉，但其在空气中不稳定，极易被氧化为Cu2O。通过扫描电镜图片观察，所得铜粉一次粒径约为十个纳米，但团聚体为数百个纳米的颗粒。