Investigations on the ignition characteristics of a semiconductor bridge with an electrostatic discharge

The damage characteristics of a typical semiconductor bridge and a microsemiconductor bridge under the action of an electrostatic discharge are studied in experiments, which include semiconductor film shape measurement, resistance fluctuate evaluation, ignition characteristics, and invalidation threshold voltage measurement. The effect of multiple discharging on the bridge state is also discussed.     

Modeling of ignition of a solid-propellant plate by a low-temperature plasma jet

A problem of ignition of a semi-infinite solid-propellant plate by a low-temperature plasma jet formed in an igniter under a high-power electric discharge is considered. Particular attention is paid to formation and evolution of zones of forced gasification of the fuel under the action of a heat flux from the plasma to the propellant. The locations of these zones are determined by satisfying two conditions: the propellant surface reaches the gasification temperature and the heat flux exceeds a certain “threshold” value. __________ Translated from Fizika Goreniya i Vzryva, Vol. 43, No. 1, pp. 23–28, January–February, 2007.     

水泥窑交流等离子无油点火技术的原理及应用

<正>1交流等离子无油点火机理交流等离子无油点火装置是利用交流380V动力电源(电流250～600A)在介质气压0.35MPa的条件下采用高频自动引弧方式接触引弧,并在强磁场下获得稳定功率的交流空气等离子,形成火焰中心温     

Toxicity identification of effluent from a semiconductor lead frame manufacturing factory

The acute toxicity of lead frame effluent to Daphnia magna was found to be 22.62 TU, which far exceeded the toxicity discharge limit in Korea (<1 TU). TIE phases I and II result suggest that the mixture of Ag, Cu and CN were likely responsible for the observed toxicity, and this was confirmed by mass balance approach (TIE phase III). In addition, the Visual MINTEQ simulation suggested the presence of [Ag(CN)₂]⁻ and [Cu(CN)₃]²⁻ complexes in the effluent. Therefore, TIE procedures with chemical speciation modeling were effective for identifying the cause of acute toxicity in industrial effluents.     

等离子点火技术在燃油锅炉上应用的可行性

介绍了等离子点火技术的基本原理 ,并对电厂燃油锅炉使用该技术的设计方案以及经济效益进行了阐述。     

High-temperature ignition of a reactive material by a hot inert particle with a finite heat reserve

The initiation of a reactive material by an inert particle at a high initial temperature and with a limited heat reserve is studied numerically. The possibility of using known ignition criteria to study the process are analyzed. The effect of burnout on high-temperature ignition by a particle with a limited heat reserve is studied. Four regimes of the process and the critical parameters separating these regimes are determined. __________ Translated from Fizika Goreniya i Vzryva, Vol. 45, No. 2, pp. 40–47, March–April, 2008.     

电站锅炉点火等离子发生器的设计

介绍等离子发生器的工作原理及设计.结合电站锅炉点火时等离子发生器的工作条件,研制出一种性能稳定、寿命长、结构简单、绝缘性好的等离子发生器.     

新型除铅材料的制备及其除铅性能

以聚氨酯泡塑为骨架,以双硫腙为接枝螯合基团,经Mannich反应,合成一种具有螯合重金属离子性能的新型材料,即双硫腙接枝聚氨酯泡塑吸附材料。依据含铅废水的水体特征以及合成的双硫腙接枝聚氨酯泡塑材料的性质,对含铅模拟废水进行吸附处理实验,探索了该泡塑材料在处理含铅废水时的最佳工艺条件,并且对其热力学及动力学机理进行了探讨。结果表明,双硫腙接枝聚氨酯泡塑材料对含铅废水有不错的吸附效果。该泡塑材料吸附铅的最佳条件:在温度20℃、p H=6时,0.3 g双硫腙接枝螯合泡塑处理5 mg/L的含铅废水50 m L,反应时间4 h后铅去除率能达到99.99%。此外,对螯合泡塑的合成机理以及吸附机理进行了理论上的分析和解释,指出了按照Mannich反应机理制备出螯合泡塑,基于在聚氨酯泡塑上引入具有螯合作用的基团双硫腙,使得该螯合泡塑具有捕捉Pb2+螯合作用。     

新型除铅材料的制备及其除铅性能

以聚氨酯泡塑为骨架,以双硫腙为接枝螯合基团,经Mannich反应,合成一种具有螯合重金属离子性能的新型材料,即双硫腙接枝聚氨酯泡塑吸附材料。依据含铅废水的水体特征以及合成的双硫腙接枝聚氨酯泡塑材料的性质,对含铅模拟废水进行吸附处理实验,探索了该泡塑材料在处理含铅废水时的最佳工艺条件,并且对其热力学及动力学机理进行了探讨。结果表明,双硫腙接枝聚氨酯泡塑材料对含铅废水有不错的吸附效果。该泡塑材料吸附铅的最佳条件:在温度20℃、p H=6时,0.3 g双硫腙接枝螯合泡塑处理5 mg/L的含铅废水50 m L,反应时间4 h后铅去除率能达到99.99%。此外,对螯合泡塑的合成机理以及吸附机理进行了理论上的分析和解释,指出了按照Mannich反应机理制备出螯合泡塑,基于在聚氨酯泡塑上引入具有螯合作用的基团双硫腙,使得该螯合泡塑具有捕捉Pb2+螯合作用。     

无污染点火升温过程中遇到的问题及解决措施

随着蓝天保卫战的开始，水泥企业都在加强治理跑冒滴漏，点火升温的烟囱冒烟也是当前环保治理的重大项目。我公司开始摸索关闭烟囱点火升温，过程中遇到一些问题，本文就关闭烟囱点火升温遇到的问题及解决措施做一分析。     

微波消解-电感耦合等离子体质谱法测定纸杯中的铅

采用HNO3-H2O2微波消解样品,电感耦合等离子体质谱(ICP-MS)法测定纸杯中的铅。探讨了最佳的微波消解参数,优化了实验条件。结果表明,该方法的检出限为0.02μg/L,加标回收率在91.66%～109.64%。该方法具有简便、快速、准确和灵敏度高的优点,适用于纸杯中铅元素的测定。     

Thermal calculations on the ignition of a cotton bale by accidental contact with a hot particle

Previously presented ignition data for raw cotton are used in order to make predictions of hazards from hot particle entry into a previously thermally quiescent cotton bale. The calculations make use of a numerical approach to ignition by a heat source.     

Study of solid propellant ignition by a hot gas stream

The process of fast ignition of double-base solid propellants (ignition time 0.6–40 msec) is studied in a model rocket chamber by means of fine thermocouples that are located on the surface being ignited and in the igniting gas stream under rapidly varying external conditions. The basic parameters of the process (propellant surface temperature, gas-propellant heat transfer coefficient, heat flux from the gas to the propellant, and the heat content and the heat release in the propellant) are obtained as functions of time. Three ignition regimes are found: fast, normal, and delayed. We discuss briefly the nature of the transition to steady-state combustion for the obtained regimes. The directions of future studies are noted.Moscow. Translated from Fizika Goreniya i Vzryva, Vol. 29, No. 3, pp. 20–26, May–June, 1993.     

Calculation of the ignition of a condensed material by a hot wire

Approximate analytical solution and numerical calculations of the ignition of a condensed material (CM) by a wire heated by direct electric current are used to study the effect of electrophysical characteristics and geometrical dimensions of the conductor and the thermokinetic properties of the solid fuel on the ignition delay. The results obtained are in satisfactory agreement with experimental data. Results of parametrical analysis are generalized by an interpolation formula. Translated fromFizika Goreniya i Vzryva, Vol. 35, No. 4, pp. 58–62, July–August 1999.