Research Status and Application Prospect of Aluminum Matrix Composites

Aluminum matrix composite is one of the most attractive metal matrix composites.It is a kind of material with strong vitality emerging in response to the needs of modern scientific development.Compared with traditional materials,aluminum matrix composites have the advantages of low density,good electric conductivity and heat conductivity,good wear resistance and oxidation resistance,high specific strength and stiffness,high temperature resistance,good heat treatment performance and flexible preparation process,which make them widely used in the fields of aviation,aerospace,and automobile.In this paper,the factors affecting the properties of aluminum matrix composites,the strengthening mechanism,classification and preparation methods of aluminum matrix composites are summarized.The research status,development direction and application prospect of aluminum matrix composites are briefly introduced.

Recent advance in synthesis and application of heteroatom zeolites

Incorporation of heteroatoms into the framewo rk of zeolites has become a significant strategy to improve their performance in catalysis and adsorption,because the obtained heteroatom zeolites exhibit quite different properties from the conventional aluminosilicate zeolites in aspects of surface acidity,pore structures,particle size and so on.In this review,the progress on the heteroatom zeolites including their synthesis and application is highlighted.First,the recent advance on the design and synthesis of different heteroatom zeolites is summarized.Special emphasis is placed on the introduction and comparison of three typical methods,including the direct synthesis,post synthesis and improved direct synthesis,for the traditional heteroatom zeolites(such as TS-1,Sn-MFI,Sn-β) and newly-reported heteroatom zeolites(such as W-MFI,Mo-MFI).According to their intrinsic characteristics,the application of heteroatom zeolites in diverse fields,such as production of fine chemicals,air pollution control and biomass conversion is then discussed.Finally,the challenges and perspective on the future development of heteroatom zeolites in low-cost preparation and practical application are proposed.

纳米生物传感器的研究进展

纳米生物传感器是纳米科技与生物传感器的融合,其研究涉及到生物技术、信息技术、纳米科学、界面科学等多个重要领域,并综合应用光声电色等各种先进检测技术,可能对临床检测、遗传分析、环境检测、生物反恐和国家安全防御等多个领域产生革命性的影响,因而成为国际上的研究前沿和热点。近年来,随着纳米科学与界面科学的蓬勃发展,纳米生物传感器引起了世人前所未有的极大关注,其开发迅猛,应用广阔。本文从纳米生物传感器的研究现状、应用和展望三方面对纳米生物传感器进行了综述,为了解纳米生物传感器的研究与应用提供帮助。

基于白光LED可见光通信的研究现状及应用前景

可见光通信作为当前无线光通信领域的研究热门,在过去几年取得了可喜的突破。采用白光LED作为光源,利用灯光高速明暗闪烁来传递信息的同时兼顾其在室内照明的功能,节约了能源。文章详细介绍了白光LED可见光通信的研究现状、关键技术、应用场景和发展趋势。

砌体墙—混凝土墙组合的研究现状及应用前景

介绍了砌体墙—混凝土墙组合结构,探讨了该组合结构的研究应用现状及存在的问题,从材料消耗、施工周期、建筑节能及社会效益等多个方面分析了砌体墙—混凝土墙组合结构的经济性能,对该组合结构的应用前景进行了展望,从而推广该组合结构的应用。

准晶材料的研究现状及其前景展望

综述了准晶材料的结构、特征及其应用现状,认为目前将准晶材料以涂层或薄膜的形式涂覆于其它材料表面,只是利用了准晶材料的不粘性、难表面氧化性、耐热、耐磨、低的摩擦系数、耐蚀及特殊的光学性能,而准晶材料还具有独特的热电性、磁阻性、吸氢性和催化性等性能尚未被应用,预言了准晶材料将会有广阔的应用前景。

数字图书馆研究现状及应用前景分析

伴随着现代高新技术的飞速发展,以计算机技术、网络通信技术为代表的因特网迅速崛起,与此相适应,图书馆在走过传统阶段、自动化图书馆阶段后,也开始步入数字图书馆阶段。本文针对数字图书馆的产生背景、概念、构成要素、发展现状及应用前景等方面进行了探讨和总结。