华能上安电厂引进的SF6全封闭组合电器

华能上安电厂二期工程５００ｋＶ升压站处于三类污秽区（盐密〉０．２５ｍｇ／ｃｍ＾２）,经对采用常规敞开式门型布置和ＳＦ６全封闭组合电器装置进行综合比较,决定采用ＳＦ６全封闭组合电器装置,并阐述了引进的ＳＦ６全封闭组合电器装置的设备布置,结构,安装及运行维护。     

铅钙合金在硫酸溶液中的电化学行为

本文应用电化学方法研究了Pb—Ca合金在不同浓度的硫酸溶液中腐蚀和析气性,并与Pb、Pb—5％～7％Sb比较,结果显示Pb—0.1％Ca合金具有良好的耐腐性和低的析气性。     

Contamination due to process gases

A survey is given of the BOC Group technical research programs, whose purpose is to relate purity in gas processing to ULSI device parameters. Results from the following research programs are presented: how inert gas purity affects the Ti silicide for IGFET metallization; the effects of argon versus nitrogen used in silicon gate oxidation process steps; and preliminary work on a new gas analytical tool, Atmospheric Pressure Ionization Mass Spectrometry (APIMS), which allows measurement of sub ppb impurity levels in processing gases.     

Power Evaluation of the Los Angeles Oxygen–Fed Ozone System

The Los Angeles Department of Water and Power (LADWP) operates a 600 mgd (2,270 ML/day) direct filtration water treatment plant which includes a 7,900 lb/day (149 kg/hr) ozonation system. Ozone is applied as a preoxidant for the purposes of disinfection and microflocculation. The ozonation system is unique in that high purity oxygen is generated on–site and is used as the feed–gas in a once–through system. The process was selected through competitive bids and evaluated for total present worth from 20–year life cycle costs which included capital plus energy expenses. Power consumption (and penalty) was valued at $6,500/kW. System power demand was measured at nine ozone production rates. A minimum specific energy of 6.5 kWh/lb (14.3 kWh/kg) of ozone was observed when generating ozone at a concentration between 5 and 6 % (wt) [65 and 80 g/m³; where the standard temperature and pressure are 70F (21.11 C) and 1 atm, respectively]. The test methodology and data assessment considerations were developed jointly by the owner and manufacturer, and produced results with practical significance beyond the performance testing objective.     

水产食品熟食品和水产食品气调包装的研究

本文介绍水产食品、烘烤食品和熟食品的气调包装工艺。从混合气体配气比例、塑料包装材料的气体阻隔性、贮藏温度和包装前食品的卫生指标四个方面因素分析食品气调包装的保鲜效果。通过试验取得一些气调包装食品的保质期。     

Interfacial modifying layer-driven high-performance organic thin-film transistors and their nitrogen dioxide gas sensors

Organic thin-film transistors (OTFTs) based on bottom-gate bottom-contact configuration were fabricated by inserting two kinds of modifying layers at the interface of source/drain electrode and organic semiconductor, while nitrogen dioxide (NO₂) sensing capability was also evaluated based on the obtained OTFTs. Compared to OTFT without interfacial layer, the field-effect mobility (μ) was enhanced from 0.018 cm²/Vs to 0.15 cm²/Vs by incorporating with MoO_x interfacial layer. Moreover, when exposed to 30 ppm NO₂, the saturation current and μ of OTFT with MoO_x interfacial layer increase 22.7% and 26.7%, respectively, while in original OTFT, the values are only 3.0% and 3.7%, respectively. The mechanism of performance improvement of OTFT sensor was systematically studied by focusing on the interface of source/drain electrode and organic semiconductor. The reduced contact resistance leads to higher μ, meanwhile, pentacene morphology modulation on MoO_x contributes to better diffusion of NO₂ molecules. As a result, higher μ and more diffused gas molecules enhance the gas sensing property of the transistor.     

半导体厂超净供气系统

介绍了集成电路制造用的电子气体中粒子控制规范,供气系统用的材料及其处理技术,供气管路和配件技术,粒子过滤及计数技术。     

燃气发动机空燃比控制系统的硬件设计与实现

为了改善燃气发动机的动力性、经济性和排放性,必须提高发动机空燃比的控制精度。本文对此系统给出了总体设计方案,并详细介绍了基于可编程控制器的系统硬件设计。该系统由信号输入电路、键盘、显示电路、报警电路等组成。该装置有很好的实时性和精确性,抗干扰能力强。     

薄膜电容器的失效分析和试验方法

薄膜电容器失效的主要原因在于其保护层防潮性能不好和实际应用中存在交流电。文中先介绍薄膜电容器的生产工艺和电子镇流器的使用环境,再介绍潮湿对电容器的危害作用,以及电容器的失效分析。作者运用详细的原理解释,结合用不同的潮湿试验条件和施加直流电压或交流电压的方法来评估薄膜电容器的实际承受能力,通过优化选择和数据对比,得出结论"85℃,85%RH,施加交流电压"是最有效的试验方法。总之,增强防潮和抗交流电能力可以保证薄膜电容器以及电子镇流器处于高质量水平。     

QD128燃气轮机发电机组的创新性应用及其影响初探

简要介绍具有自主知识产权的QD128燃气轮机发电机组的构成、主要技术参数和主要特点。结合工程建设情况,分析QD128燃气轮机发电机组降低工程造价、运行成本的优势和特有的连续运行时间长、过负荷能力强,节能等技术创新以及QD128燃气轮机发电机组作为通信用备用发电机组可能对目前大功率备用发电机组的市场格局和运行维护模式带来的影响。