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吕宗尹 《国外塑料》2012,(11):29-30
2011年中国塑料制品行业实现平稳较快发展,行业产值迅速增长、内需旺盛、产销顺畅,高技术、创新型塑料机械、产品工艺倍受青睐。为了实现塑料行业产值持续稳定发展,推动新型工业的技术研发创新,促进行业内备企业实现资源共享,提高和扩大行业有效信息传递速度和范围,中国塑协携手广东省塑料工业协会、广东省佛山市南海区狮山镇人民政府举办“2012年(第七届)塑料工业新材料、新工艺、新装备行业峰会”。  相似文献   

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罗钟生  罗英涛 《炭素技术》2013,32(4):67-69,79
以超低灰的煤炭LAC为原料,得到了可以代替石油焦用于阳极制作的原料CLAC。研究了由CLAC制作的阳极各项理化性能及在大型铝电解槽上的应用,认为添加部分CLAC制作的炭阳极可以满足铝电解槽对阳极的使用要求。  相似文献   

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We all make use of oxide ultrathin films, even if we are unaware of doing so. They are essential components of many common devices, such as mobile phones and laptops. The films in these ubiquitous electronics are composed of silicon dioxide, an unsurpassed material in the design of transistors. But oxide films at the nanoscale (typically just 10 nm or less in thickness) are integral to many other applications. In some cases, they form under normal reactive conditions and confer new properties to a material: one example is the corrosion protection of stainless steel, which is the result of a passive film. A new generation of devices for energy production and communications technology, such as ferroelectric ultrathin film capacitors, tunneling magnetoresistance sensors, solar energy materials, solid oxide fuel cells, and many others, are being specifically designed to exploit the unusual properties afforded by reduced oxide thickness. Oxide ultrathin films also have tremendous potential in chemistry, representing a rich new source of catalytic materials. About 20 years ago, researchers began to prepare model systems of truly heterogeneous catalysts based on thin oxide layers grown on single crystals of metal. Only recently, however, was it realized that these systems may behave quite differently from their corresponding bulk oxides. One of the phenomena uncovered is the occurrence of a spontaneous charge transfer from the metal support to an adsorbed species through the thin insulating layer (or vice versa). The importance of this property is clear: conceptually, the activation and bond breaking of adsorbed molecules begin with precisely the same process, electron transfer into an antibonding orbital. But electron transfer can also be harnessed to make a supported metal particle more chemically active, increase its adhesion energy, or change its shape. Most importantly, the basic principles underlying electron transfer and other phenomena (such as structural flexibility, electronic modifications, and nanoporosity) are now largely understood, thus paving the way for the rational design of new catalytic systems based on oxide ultrathin films. Many of the mechanisms involved (electron tunneling, work function changes, defects engineering, and so forth) are typical of semiconductor physics and allow a direct link between the two fields. A related conceptual framework, the "electronic theory of catalysis", was proposed a long time ago but has been largely neglected by the catalytic community. A renewed appreciation of this catalytic framework, together with spectacular advances in modeling and electronic structure methods, now makes it possible to combine theory with advanced experimental setups and meet the challenge of designing new materials with tailored properties. In this Account, we discuss some of the recent advances with nanoscale oxide films, highlighting contributions from our laboratory. Once mastered, ultrathin oxide films on metals will provide vast and unforeseen opportunities in heterogeneous catalysis as well as in other fields of science and technology.  相似文献   

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如何选择化工新产品新技术   总被引:1,自引:0,他引:1  
讨论了技术需求方如何有效地选择精细化工新技术、新产品,认为技术市场是选择新技术、新产品的重要渠道。  相似文献   

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《国外塑料》2012,(1):56-58
热流道技术是应用于塑料注塑模浇注流道系统的一种先进技术,是指从注射机喷嘴送往浇口的物料始终保持熔融状态,在每次开模时不需要固化作为废料取出,滞留在浇注系统中的熔料可在再一次注射时被注入型腔。节约原料、降低制品成本的热流道技术已成为塑胶注塑成型工艺的一个热点方向。  相似文献   

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陆刚 《现代技术陶瓷》2010,31(4):23-29,36
随着科学技术的不断发展,汽车的研发及生产阶段越来越多地采用新材料及新工艺,这也使得人们对汽车轻质化、低成本、智能化、经济性和可靠性的要求成为可能。特种陶瓷具有各种优异、独特的性能,应用在汽车上,对减轻车辆自身质量、提高发动机热效率、降低油耗、减少排气污染、提高易损件寿命、完善汽车智能性功能都具有积极意义。车用陶瓷已引起工程领域材料科学的关注,根据碳化硅等特种陶瓷的结构性能及种类,分别介绍了陶瓷发动机、热敏陶瓷传感器、车用催化净化器的陶瓷载体、尾气净化蜂窝陶瓷材料载体、柴油车排气净化陶瓷蜂窝过滤器和陶瓷汽车制动器刹车片,以及车用陶瓷轴承等实例,充分反映了车用陶瓷新材料的研究和开发其应用前景广阔。  相似文献   

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工程创优在石化工程建设系统已开展了十余年,每年石化集团总部都组织评选部级优质工程(集团公司优质工程)并根据部优工程的情况向全国工程建设行业协会推荐国家级优质工程.  相似文献   

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