硅烷热分解方法中温度对硅棒质量的影响

针对采用CVD反应器的硅烷热分解工艺制备棒状高纯多晶硅的过程进行了研究。理论上研究了硅烷受热分解的过程,以及温度梯度对硅沉积的影响。从应用角度出发,研究了制备过程中棒状多晶硅致密性、能耗、硅烷转化率等方面的影响因素。通过降低杂质和改善硅棒外观,使生产的多晶硅棒达到了区熔级的标准,并成功区熔成晶。提出了在制备工艺中尚待优化的问题,指出采用侧面间接进气方式有利于沉积的均匀性和致密性。     

多晶硅生产过程中硅烷废气的处理

文章主要介绍了如何通过碱液淋洗工艺对于在硅烷流化床法生产多晶硅的过程中所产生的硅烷废气进行无害化处理以满足环保要求。     

刍议四氯化硅的多晶硅副产物的有效利用

随着科技的不断发展，清洁能源也得到了开发和利用，随着光伏产业迅猛发展，加速了多晶硅产业的发展。三氯氢硅是多晶硅生产的主要原料，在其生产过程中，最主要的副产物就是四氯化硅，而四氯化硅将会带来严重的环境污染。因此，对四氯化硅进行合理处理，对多晶硅绿色生产的实现具有较大的现实意义。本文主要对四氯化硅的应用现状给予介绍，并对多晶硅副产物的有效利用进行探究，比如制备光纤原料高纯四氯化硅、三氯氢硅、硅酸酯类及白炭黑等。     

多晶硅制备工艺及发展趋势分析

多晶硅是用来制作太阳能电池的重要材料,本身拥有多种制备工艺和技术。而随着太阳能等可再生资源的利用程度的提升,多晶硅的制备工艺也得到了不断的发展,从而满足多晶硅的生产需求。因此,基于这种认识,本文对西门子工艺、冶金法和流化床法这几种常见多晶硅制备工艺进行了分析。而在此基础上,则对多晶硅制备工艺的发展趋势进行了探究,以便为关注这一话题的人们提供参考。     

我国液体润滑剂研制获重要突破

成本高居不下一直是制约多晶硅以及光伏产业发展的根本问题。湖北武大有机硅新材料股份有限公司等国内单位在吸收国外先进成果，并进行大量实践的基础上，创造性提出了以直接法烷氧基硅烷为基础的多晶硅工业新体系，有望从源头破解这一难题。     

树脂除碳技术在超纯三氯氢硅提纯工艺中的应用

三氯氢硅的合成过程中会引入碳杂质,在多晶硅和作为硅源的硅外延片生产中很容易发生沉积,形成晶格点缺陷,从而影响半导体材料的性能。高纯三氯氢硅中碳杂质主要以甲基二氯硅烷形式存在,而甲基二氯硅烷沸点与三氯氢硅接近,依靠单纯的精馏法很难去除。文章重点介绍普通精馏法、吸附法、反应精馏法等几种三氯氢硅除碳方法,经过对比分析,精馏与树脂吸附相结合是目前比较有效的三氯氢硅除碳工艺。     

光纤用高纯SiCl4制备方法的研究

本文对比分析了几种光纤用高纯SiCl4的制备方法,包括精馏法、吸附-精馏法、部分水解法和光氯化法,得出光氯化法为目前为止最合适的制备光纤用高纯SiCl4的方法.     

生产电子级多晶硅的影响因素

多晶硅在诸多领域被广泛的应用。目前改良西门子法以其节能、节省物耗、减少污染等优点被广泛应用于多晶硅生产中。多晶硅生产厂家现在大多只能生产出太阳能级多晶硅,而对电子级多晶硅的生产一直存在着技术瓶颈。文章从生产原料中的硅粉、生产工艺中的精馏工艺、尾气回收工艺、还原工艺分别对生产电子级多晶硅产品质量的影响作了详细地阐述。从工艺参数控制、原料及中间产物质量管控等方面着重加以论述。     

电子级多晶硅生产中间产品氯硅烷中痕量磷含量检测方法进展

采用改良西门子法在生产电子级多晶硅过程中,精馏中间产物氯硅烷通入多晶硅还原炉,通过氢气还原氯硅烷生产多晶硅,其中氯硅烷中存在的各种形式的磷作为施主杂质,对电子级多晶硅产品质量影响重大。文章系统阐述电子级多晶硅生产中间产品氯硅烷中痕量磷含量的检测方法及研究进展,通过比较各种氯硅烷中痕量磷含量杂质检测方法的优缺点,以供日常检测参考。     

高纯八甲基环四硅氧烷制备工艺研究进展

高纯八甲基环四硅氧烷广泛应用于光通讯行业,更是集成电路等电子工业生产中不可缺少的基础和支撑材料之一。文章重点介绍了高纯八甲基环四硅氧烷(D4)的除杂提纯工艺,包括精馏法、络合精馏法、结晶-真空抽滤法、金属去除剂除杂法,分析了各个方法的优点及限制其广泛应用的制约因素,最后展望了高纯八甲基环四硅氧烷提纯除杂技术未来的发展方向。     

基于年轻人对时尚审美情趣下的服饰店面多元化陈列研究

陈列设计的概念作为最具潜力的营销策略,让其注入更新鲜的血液来满足年轻消费者的心理需求,成为当今服装消费市场对提升商品附加值的研究重点。本项研究调查对象覆盖武汉、上海、青岛、天津、北京、南宁、珠海等十多个省份。一百多份调查结果体现年轻人追求多重情感因素相融合的服装消费心理。据此,将深入分析年轻人对各层面陈列因素的认可程度,根据其对审美、文化、视觉、时尚、生活等品位的追求,得出多元化创意陈列设计构想,旨在给予顾客在购物的同时更多浪漫、文艺、个性化等感官、精神体验,增强消费前沿预见性。     

The impact of new product launch strategies on competitive reaction in industrial markets

The importance of successful innovation for the long‐term performance of companies can hardly be exaggerated. However, we need to consider this in a dynamic setting, in which competitors do not remain passive. We find that two thirds of new product launches meet reaction by competitors after their launch. We also empirically demonstrate that the strategic launch decisions that managers take have an effect on future reaction by competitors. Following an extensive review of the literature, a propositional model is developed. In order to test this theoretical model, an ex post facto field study was designed, in which the authors obtained comprehensive information on 509 new industrial products launched in the US, the UK and the Netherlands. Competitive reaction is diagnosed in terms of changes in the marketing instruments of the competitor. A logistic regression model is estimated on the occurrence of competitive reaction with any marketing instrument. We also look at the occurrence of individual marketing instrument reactions. The data show that competitors react primarily by means of price changes. Product assortment and promotional changes are less frequent, whereas distribution policy modifications occur very rarely. The characteristics of the new product launch strategy were found to have a significant impact on both the occurrence and nature of competitive reactions. We claim that the competitive effect of radically new products and incrementally new products greatly differs. The results show that competitors fail to respond to radical innovations and to new products that employ a niche strategy. They do react if a new product can be assessed within an existing product category and thus represent an unambiguous attack. Both innovative and imitative new products meet reaction in this case. The results also demonstrate that competitors are more inclined to react to the introduction of new products that are supported by extensive communication by the innovating firm. The likelihood of reaction is also higher in high growth markets than in low growth markets. The article discusses theoretical and managerial implications of these results, as well as thoughts for future research that may add more insight.     

关于铅锌原矿Pb、Zn品位分布状况的研究

铅锌矿所采出原矿的Pb、Zn品位在出矿随机取样分析时所得到的检测结果的统计分布状况同时也反映了矿产资源在一定的地质条件下所生成的地质原矿金属品位的分布。根据统计资料对原矿的Pb、Zn品位分布状况进行研究，目的就是找出其分布规律，以建立其分布的概率密度函数，结合探矿时矿体的资料科学地计算出原矿Pb、Zn品位分布区间的概率。以便更准确地推断矿产资料储有量。     

针织面料在春秋外衣设计上的应用与分析

针织面料主要用作内衣生产,用针织面料进行春秋季外衣设计,能发挥针织物柔、垂、贴、透的特点。针织物不只可以用作贴身的内衣生产的面料,在外衣设计中也能够发挥针织物休闲的特点,为服装设计增添新的思路。针织物的透气性可以进行相对大小的控制,以满足设计要求;针织物能够通过自身组织设计,满足外衣设计的尺寸稳定性;针织面料服装在加工过程中,要注意自身的加工特点。针织面料与机织面料有机结合设计效果更好,能够充分发挥各种面料的性能特点。     

Utilizing a Value of Information Framework to Improve Ore Collection and Classification Procedures

This case study utilizes a value of information decision framework to provide mine managers guidance regarding the purchase of ore grade scanners. LKAB's Kiruna mine produces three types of iron ore to meet long-term contractual agreements on a monthly basis. There is a priori uncertainty regarding the ore type in any given mineable section of the orebody. In addition, there is extracted ore type uncertainty that is introduced by the mining process. These uncertainties are better understood by obtaining more precise (real-time) information. In addition, a better understanding of the uncertainties can improve the quality of operational decisions and increase the overall profitability of the mine. This case study provides a framework for measuring the economic impact of information purchases in a mining context and discusses the implications of those findings.     

贝利特水泥的优势及研究现状

贝利特水泥由于能耗低而逐渐引起人们的关注。随后因为它还具有水化热低、耐久性好、干缩小、可利用低品位原料、污染小等优点而引起人们越来越多的研究。虽然贝利持矿物早期强度较低,但通过引入早强矿物或加适当的稳定活化剂或低温煅烧等方式可以解决贝利特水泥早强低的问题。本文综述了贝利特水泥的优势、发展现状以及最新的研究成果,为贝利特水泥的进一步开发与研究提供参考。     

中海油特种I-DSBS改性沥青的生产技术与质量控制

为了提高I-D SBS改性沥青的各项性能指标,以满足特种I-D SBS改性沥青的质量需求,利用中海油自产的重交沥青作为基质沥青原料,韩国LG501型号SBS为改性剂,对应的生产技术,对生产特种I-D SBS改性沥青中的质量控制技术进行了分析,结果表明,通过控制基质沥青、SBS等原辅材料的质量和生产过程工艺参数,能够生产出合格、稳定的特种I-D SBS改性沥青产品。     

利用壳聚糖亲和层析提取抑酶肽的研究

采用化学改性的壳聚糖为载体,共价法偶联胰蛋白酶,制成抑酶肽亲和吸附剂,将其直接亲和层析牛肺提取液,分离、纯化高比活力的抑酶肽。抑酶肽抑制比活力为71 428 BAEE.mg-1,酶活性回收率为62.5%。该方法质量稳定,成本较低,吸附剂机械强度高,抗污染能力较强,非特异性吸附较小,可反复使用,价格低廉,适于应用。     

Viewpoint

Enterprises set up to process agricultural materials into foods sought by consumers can bring a range of benefits They help meet the growing and changing food demands of urban consumers They may reduce expenditure of scarce foreign exchange on imports for consumption They provide an incentive to domestic agriculture to expand and intensify its output Where they provide production guidance and necessary credit inputs, reducing risks by ensuring a specific market under contract, they can be a strategic instrument for the introduction of new agricultural technology Both by their direct contribution to the raising of famers' incomes, and the additional employment they provide in agriculture, the processing operation, and associated services, they are a potent force for rural development.