二氯二氢硅的纯化

采用化学改性的吸附剂和络合剂，能够有效地除气体中的金属和硼，砷，磷等非金属杂质。纯化后的气体经气相色谱分析，表明化学改性的吸附剂和络合剂对二氯二氢硅无歧化作用。     

电光源用混合气

介绍了电光源的分类,着重阐述常用气体放电光源的种类、气体放电光源的基本原理、电光源常用气体和混合气的品种、规格及典型组成.     

灯用气体的现状和新发展

电光源行业的发展对灯用气体提出了更广更高的要求.灯用气体作为影响电光源产品品种、质量的重要因素受到电光源业界的广泛关注.南京特种气体厂有能力为电光源研究、生产单位所需灯用气体和技术服务提供支持.     

变压吸附（PSA）装置的预处理技术方案简析

变压吸附技术是一种用途广泛的气体分离及净化技术,其操作简单,能耗低,可靠性强。但其核心吸附剂对很多物质,如液体、硫化物、焦油、萘及苯不能彻底解吸,进入变压吸附装置的原料气如果含有这些组分或液体,则需要预先进行净化分离。本文就常用的预处理方案,如干法脱硫、变温吸附、膜分离等的技术难点及适用性进行简要介绍。     

沸石吸附性能及其在环境保护中的应用

沸石是一种优良吸附剂。其特性对于控制环境污染极为重要,一些天然和合成分子筛材料已成功地用于除去烟道气SO_2和NO_x,净化空气,清除水面油污,生产富氧空气,污水处理以及提高利用垃圾产生的甲烷气体的纯度。     

氯化钠改性5A分子筛吸附剂的实验研究

采用氯化钠浸渍法改性5A分子筛，并吸附净化泥磷制取次磷酸钠产生的含PH。气体，选择吸附效率和吸附容量进行吸附剂吸附效果的判定。主要考察了氯化钠浸渍液的浓度、吸附剂的干燥温度、焙烧温度对吸附效果的影响，确定了最适宜的吸附剂制备条件：在浸渍液浓度0．3mol／L、干燥温度110~C、焙烧温度为300℃的条件下，吸附容量为2...     

氯化钠改性5A分子筛吸附剂的实验研究

采用氯化钠浸渍法改性5A分子筛,并吸附净化泥磷制取次磷酸钠产生的含PH₃气体,选择吸附效率和吸附容量进行吸附剂吸附效果的判定。主要考察了氯化钠浸渍液的浓度、吸附剂的干燥温度、焙烧温度对吸附效果的影响,确定了最适宜的吸附剂制备条件:在浸渍液浓度0.3mol/L、干燥温度110℃、焙烧温度为300℃的条件下,吸附容量为20mg/g,穿透时间可达6h。     

甲缩醛的置备与合成

概述了甲缩醛的基本合成方法，如甲醛和甲醇反应精馏制备甲缩醛、甲醇与多聚甲醛合成甲缩醛、二甲醚氧化法合成甲缩醛、二溴甲烷合成甲缩醛、甲醇一步氧化法合成甲缩醛，对某些合成方法进行了评述、成本分析和评价，并简单介绍了甲缩醛在各方面的应用以及发展前景。     

季铵碱树脂催化三甲氧基硅烷制备甲硅烷

为制备高纯度甲硅烷气体,用强碱性季铵碱阴离子交换树脂催化三甲氧基硅烷溶液进行歧化反应.采用脉冲放电氦离子化检测器测试粗甲硅烷气体,用气相色谱-质谱联用仪、感应耦合等离子体质谱仪测试精馏提纯的副产物四甲氧基硅烷.实验结果表明:在30～50℃和0.2～0.3 MPa条件下反应制备的粗甲硅烷气体中,H2、O2、Ar、N2、CH4的质量浓度分别为221.12、1.76、1.61、17.97、0.15μg/L,纯度达到99.9%;副产物四甲氧基硅烷中,金属杂质总质量浓度低于0.15μg/L,可用来制备高纯度硅溶胶;季铵碱催化三甲氧基硅烷歧化反应,反应条件温和,三甲氧基硅烷转化率96%,硅烷产率95%.催化剂易于购买,采用固定床反应器易于控制反应,易于连续加料,此工艺具有工业化生产价值.     

正丁烷纯化工艺的改进

通过对精馏和吸附净化法的分析比较，根据原料来源含杂质情况，原纯化工艺已不能满足要求，故作了改进，经改进大大提高了产品纯度，可为类似的有机气体纯化工艺提供借鉴。     

Determination of bromine stable isotopes using continuous-flow isotope ratio mass spectrometry

A new methodology for bromine stable isotope determination by continuous-flow isotope ratio mass spectrometry (CF-IRMS) was developed. The technique was tested on inorganic samples. Inorganic bromide was precipitated in the form of silver bromide by using silver nitrate in a standard methodology. Bromine stable isotope analysis was carried out on methyl bromide (CH3Br) after converting silver bromide to methyl bromide by reacting it with methyl iodide (CH3I). The system used in this study is an IsoPrime IRMS, with analytical capabilities of both dual-inlet and continuous-flow modes coupled with an Agilent 6890 GC equipped with a CTC Analytics CombiPAL autosampler. This new technique measures samples as small as 0.2 mg of AgBr (1 micromol of Br-). The bromine stable isotope analysis using continuous flow technology showed excellent precision and accuracy. The internal precision using pure methyl bromide gas is better than +/-0.03 per thousand (+/-SD); the external precision using seawater standard is better than +/-0.06 per thousand (+/-SD) for n = 12. Moreover, the sample analysis time is 16 min, as compared to 75 min needed in previous techniques. This allows for 50 samples to be analyzed in 1 day, as compared to 8 samples using the conventional techniques. A series of natural saline formation waters and brines from sedimentary and crystalline rock environments was measured by this new methodology to test the potential natural range of delta81Br. The bromine isotopic composition of the samples ranged from 0.00 to +1.80 per thousand relative to standard mean ocean bromide (SMOB). Initial trends and distinctive isotopic difference were noticed between crystalline shield brines and sedimentary formation brines.     

Cross-spectrally pure light,cross-spectrally pure fields and statistical similarity in electromagnetic fields

This paper describes the concept of cross-spectrally pure light, implications of statistical similarity of an optical field on its cross-spectral purity and cross-spectrally pure fields. First, the concept of cross-spectral purity of light is analysed in the space-frequency domain by taking into account the vectorial nature of the radiation, and the conditions and reduction formula are obtained. Then, by utilizing statistical similarity, the relationship between cross-spectral purity and spatial coherence is explored in the electromagnetic field. Last, the conditions for cross-spectrally pure fields are discussed, the polychromatic plane wave and the far field produced by a planar, secondary, stochastic electromagnetic source are studied as examples, and moreover, the relationship between cross-spectral purity and spatial coherence, which we have drawn, is verified during the study.     

FeVO_4光催化剂降解甲基橙研究

实验采用液相沉淀法制备了三斜型FeVO4光催化剂,采用X射线衍射仪(XRD)、扫描电子显微镜(SEM)等方法对样品结构和形貌进行分析和表征,在40W紫外灯(主波长为253.7nm)照射下降解一定浓度的甲基橙溶液,研究其对甲基橙溶液降解效果.研究了催化剂用量、甲基橙初始浓度、光强度及pH值对甲基橙降解率的影响.     

高纯电子级溴化氢合成研究之一 ——反应动力学特性及其机理

为解决高纯电子级溴化氢源头制备的工程技术难点,对溴化氢合成过程的各基元反应进行了深度剖析,采用随机算法进行了动力学模型构建与模拟。通过公式推导,并结合实验结果,得到了宏观总动力学方程。根据溴化氢合成动力学特性,总结了溴化氢燃烧链式反应的机理。同时,考察了不同温度、投料比对溴化氢合成的影响。得到的一系列结论可以为干法无硫溴化氢原料合成的产业化提供科学支撑。     

The formation of development centers in silver bromide based composites under the action of electric field and temperature

We have studied the formation of development centers in composites of the silver bromide-pyroelectric type under the action of electric field and temperature. It is demonstrated that an excitation (in the form of charge carriers or light quanta) can be transferred from some pyroelectric materials to silver bromide under thermal excitation conditions. The electric-field-induced formation of development centers in the composites is probably related to the surface reconstruction under the action of a polarizing electric field.     

Effect of Methyl Bromide Additions on the Flame Speed of Methane

The effect of small quantities of methyl bromide, up to 0.5 percent by volume, on the flame speed of methane-air mixtures has been determined. Maximum flame speeds, at given experimental conditions, are reduced proportionately to the amount of methyl bromide added. Flame speeds of rich mixtures are reduced much more than are flame speeds of lean mixtures. Reaction zone thickness of methane-air flames is increased by the addition of methyl bromide and the thickness increases with the amount of methyl bromide.     

Dipole radiation into grating structures

We present a detailed electromagnetic analysis for the radiation of an electric source located inside grating structures. Our analysis is based on the differential method and uses the scattering-matrix algorithm. We show that gratings that exhibit periodic modulations along two spatial directions (crossed gratings) enable one to couple out the totality of the light emitted by the source into the guided modes of the structure. This property is investigated through the computation of the far-field radiation patterns for crossed gratings with various etching depths. One key result is the possibility to confine the emitted light in a direction about the sample normal, a property that is of interest in the context of spontaneous emission control by microcavity structures.     

玻璃微珠-Cu/Cu_2O复合镀层的制备及其光催化降解甲基橙的研究

采用化学镀铜和水热氧化法制备了玻璃微珠-Cu/Cu2O复合镀层,采用X射线衍射仪(XRD)、扫描电子显微镜(SEM)等方法对样品结构和形貌进行了分析和表征,在日光灯照射下降解一定浓度的甲基橙溶液,研究其对甲基橙溶液的降解效果。研究了催化剂用量、pH值和甲基橙初始浓度对甲基橙降解率的影响以及催化剂在重复使用中的稳定性。     

SYCY—86B型高精度光源颜色动态测量系统的研制

SYCY-86B型光源颜色动态测量系统是在SYCY-86型瞬变光源颜色测定仪的基础上研制的一种新型颜色测量设备,主要用于解决不稳定发光体的光度和色度参量测量,可测量光源的发光强度、色度坐标、主波长、色纯度、光照度等光度、色度参量。和原有的仪器相比较,B型系统的测量精度、动态范围、数据处理能力等均有较大程度的提高,仪器使用也更加方便可靠。