我国工业六氟化硫纯化技术近况及改进

重点介绍了六氟化硫中可水解氯化物杂质气体的去除方法及其干燥吸附剂的选择，并对我国六氯化硫气体的纯化技术提出了改进建议。     

特种气体市场及应用

由于气体产品种类很多,其分类和定义被厂家规定得五花八门,很不一致。因此,要确切地对所有气体产品作一分类和定义颇为困难。只能根据一般情况对气体的概况加以比较切合实际的分类。气体产品大至可以分为两大类别,即一般工业气体和特种气体。一般工业气体是指经过空气分离设备制造的普通级的氧气和氮气、经过焦炉气分离或电解等方法制造出来的普通纯度的其它种类气体。工业气体一般要求生产量大,但对气体的纯度要求不高。特种气体则是用途有别于一般气体的气体。它在纯度、品种、性能等方面都是严格按照一定规格进行生产和使用的。特种…     

特种气体中的粒子测定

特种气体中的粒子测定ＪａｍｅｓＪＨａｒｔ，ＷａｙｎｅＴＭｅＤｅｒｍｏｔ等特气系统中的粒子浓度，不仅在各点变化，而且也在规定时间之外变化，此变化在气瓶内部和减压后是最明显的。所观测到的粒子污染程度未必表示系统的质量，因为测定取决于取样的特殊点和许多因素...     

特种气体贮运,应用,安全与特性：氯,氯化氢,硫化氢,六氟化硫

特种气体贮运、应用、安全与特性氯、氯化氢、硫化氢、六氟化硫梁国仑（化工部光明化工研究设计院大连１１６０３１）氯英文名称：Ｃｈｌｏｒｉｎｅ分子式：Ｃｌ２１物化性质氯是一种黄绿色、有毒、不可燃、具有氧化性的气体。分子量７０．９０６。蒸汽压（ｋＰａ）：１９...     

我国特种气体产业的发展

回顾了我国集成电路产业的发展历程，介绍了自“六五”以来电子特种气体攻关和产业化成绩，指出石油化工企业用标准气市场潜力巨大。     

特种气体的环境保护措施

简述了化工部光明化工研究所在特种气体研制和生产中所采取的安全防护、尾气处理和监测报警措施．     

石化用特种气体安全贮运

扬子石化公司在全国石化行业中占有重要的地位。在我公司生产装置开车、停车和正常运行中，要用多种高纯气和几十种多组分标准混合气来校准、标定在线分析仪表及分析原料和产品的检测仪器，这对于生产装置稳定运行和提高产量、质量是非常重要的，是石化生产的眼睛。石化用...     

高纯六氟化硫研制成功

高纯六氟化硫是我国科研、生产等许多部门急需的特种气体，在半导体工业中用于等离子蚀刻工艺，在光导纤维制造中用作隔离层掺杂剂。高纯六氟化硫还是重要的激光材料，在其它领域也有重要用途。过去，我国使用的高纯六氟化硫全部依赖进口。     

六氟化硫标准气体GC-μECD分析方法的研究

讨论了氮及空气中SF6的GC-μECD的分析方法,对影响色谱分离条件的动力学因素(操作变量)进行了选择性的研究;该方法具有高的灵敏度和好的选择性,检测限可达到20×1-0 12m o l/m o l,精密度优于1%。     

特种气体中单元高纯气体的品种及用途

特种气体是由两大类气体组成的。一类为单元高纯气体，另一类为混合气体。对于单元高纯气体，根据现已收集到的文献，汇总起来共有227种，可分成五个类别。     

六氟化硫产品市场展望

中国的经济调控政策,六氟化硫产业面临一系列严峻问题.六氟化硫经营市场和产品策略不得不进行相应的调整,对产业发展方向提出了建议.     

特种气体六氟化钨的合成与净化

介绍了特种气体六氟化钨的性质、用途,并着重阐述了六氟化钨的合成方法及六氟化钨的净化工艺,指出了六氟化钨的发展前景及我国研究开发六氟化钨的紧迫性.     

氦中四氟甲烷、氧化亚氮和六氟化硫混合气体标准物质的研制

论述了氦中四氟甲烷、氧化亚氮和六氟化硫混合气体标准物质的制备方法、性能考察、不确定度计算,经与国内外同类标准物质比较,证明量值准确可靠、方法可行。     

Thermodynamic Properties of Sulfur Hexafluoride

We present new vapor phase speed-of-sound data u(P, T), new Burnett density–pressure–temperature data (P, T), and a few vapor pressure measurements for sulfur hexafluoride (SF₆). The speed-of-sound data spanned the temperature range 230 KT460 K and reached maximum pressures that were the lesser of 1.5 MPa or 80% of the vapor pressure of SF₆. The Burnett (P, T) data were obtained on isochores spanning the density range 137 mol·m^–34380 mol·m^–3 and the temperature range 283 KT393 K. (The corresponding pressure range is 0.3 MPaP9.0 MPa.) The u(P, T) data below 1.5 MPa were correlated using a model hard-core, Lennard–Jones intermolecular potential for the second and third virial coefficients and a polynomial for the perfect gas heat capacity. The resulting equation of state has very high accuracy at low densities; it is useful for calibrating mass flow controllers and may be extrapolated to 1000 K. The new u(P, T) data and the new (P, T) data were simultaneously correlated with a virial equation of state containing four terms with the temperature dependences of model square-well potentials. This correlation extends nearly to the critical density and may help resolve contradictions among data sets from the literature.     

气相色谱法在六氟化硫制备中的应用

通过对目前市场主流的六氟化硫气体生产厂商现场色谱检测分析,跟踪特征杂质气体在新气处理过程中的变化趋势,得到了特征杂质气体和气体的变化规律,并指导了六氟化硫生产过程中的质量把控.     

氮气中氧、氮气中二氧化硫气体标准样品的研制

叙述了气体报警仪标定和检测使用的氮气中氧、氮气中二氧化硫气体标准样品的制备,以气相色谱法对其均匀性和稳定性进行考核,确保其数据准确可靠。     

六氟化硫中微量一氧化碳的分析

通过在转化炉和色谱柱之间加一个切换阀,来测定六氟化硫中的一氧化碳。通过对进样前和进样后转化炉转化率测试后的比较,证明此方法确实可行。     

Effects of Treatment Time by Sulfur Hexafluoride (SF6) Plasma on Barrier and Mechanical Properties of Paperboard

Sulfur hexafluoride (SF₆) plasma, using inductively coupled plasma technique, was applied on paperboard surfaces. Effects of different treatment times on water and oil resistances, mechanical properties (through tensile, compression and folding endurance tests) and barrier properties [through water vapor transmission rate (WVTR) and oxygen transmission rate (OTR)] were determined. Results showed that SF₆ plasma treatment can improve water resistance properties of paperboard significantly, beginning with only a 2 s treatment time (p ≤ 0.05), whereas oil resistance properties can be improved over a longer time period. Plasma treatment had no effect on tensile strength of treated paperboard; however, machine direction (MD) compression strength, as well as MD and CD folding endurance, of treated paperboard was significantly lower than that for an untreated sample (p ≤ 0.05). WVTR and OTR of treated paperboard were higher with increasing treatment time, because of fluorine atoms and electron bombardment causing etching of cellulose fibres. Copyright © 2011 John Wiley & Sons, Ltd.     

高纯六氟化钨的制备技术研究进展

随着电子工业迅速发展,六氟化钨被广泛应用于半导体行业,其需求量日益扩大,对其纯度要求也越来越苛刻。综述了现有六氟化钨最常用的制备及纯化方法,分析了这四种纯化方法各自优缺点。在实际生产中,应根据六氟化钨中所含杂质的种类,联用多种纯化方法来获得高纯六氟化钨产品。此外,应尽早实现高纯六氟化钨工业化生产,填补国内相关领域空白。     

Densities of Sulfur Hexafluoride and Dinitrogen Monoxide over a Wide Temperature and Pressure Range in the Sub- and Supercritical States

Densities of sulfur hexafluoride (SF₆) and dinitrogen monoxide (N₂O) have been measured with a fully computer-controlled high-temperature high-pressure vibrating tube densimeter system in the sub- and supercritical states. The uncertainty in density measurement was estimated to be between ±0.2 and ±0.3kg·m^–3 depending on the temperature. With respect to accuracy, reliability, suitability, and time consumption, this system has significant advantages for measuring PT properties in the compressed liquid and supercritical states. The densities were measured for temperatures from 273 to 623K and at pressures up to 30MPa for SF₆ (442 data points) and from 273 to 473K and up to 40MPa for N₂O (251 data points), which encompassed density ranges between 142.9 and 1778.5kg·m^–3 for SF₆ and between 124.4 and 1051.1kg·m^–3 for N₂O. Furthermore, the liquid densities of SF₆ and N₂O were correlated with a new three-dimensional density correlation system (TRIDEN) and the complete set of PT data in the sub- and supercritical states were correlated with a virial-type equation of state. For checking the accuracy and suitability of the vibrating tube densimeter system, the experimental densities of SF₆ were compared with published data and with the results of a reference equation of state.