煅烧煤矸石粉体材料活性评价方法的研究进展

煤矸石是煤炭开采和加工过程中产生的固体废弃物,将其应用于水泥基材料是煤矸石资源化的有效途径。本文综述了国内外关于煅烧煤矸石粉体材料活性的评价方法——强度评价方法、火山灰性试验方法和现代分析测试方法(XRD、IR、NMR和ICP-AES)。针对煅烧煤矸石活性材料在水泥基材料研究和应用中存在的主要问题,分析阐明了其高效应用于实际工程中的研究重点。为加快煤矸石在水泥基材料中的资源化利用,提出了一些参考性建议。     

用ICP-AES法测定氰化镀银溶液中铜、铁、铅、镉、钙、镁含量

以硝酸和盐酸破坏银氰化合物,使氰化物和银分别以氢氰酸气体和氯化银沉淀形式除去,用ICP-AES法连续测定了铜、铁、铅、镉、钙、镁的含量.结果表明,方法检出限为0.001 5～0.110 0 μg/mL,加标回收率在89%～124%之间.用于氰化电镀银溶液杂质元素测定,结果令人满意.     

ICP-AES法测定铬酸盐体系半无机涂层液中磷、铝、铁、镁、锌的含量

该研究建立采用电感耦合等离子体发射光谱(ICP-AES)测定铬酸盐体系半无机涂层液中磷、铝、铁、镁、锌元素的方法。研究结果表明,采用硝酸、高氯酸溶解样品,样品中有机成分可分解完全,有效消除有机物对仪器的干扰。在优化的仪器工作条件下,采用基体匹配法以消除基体干扰,各元素校准曲线的线性相关系数均大于0.999 5;方法的检出限为0.003 3～0.030 mg/L。按照试验方法测定涂层液中磷、铝、铁、镁、锌含量,结果表明相对标准偏差(RSD,n=8)为0.59%～4.85%,加标回收率为95.5%～105.0%。     

ICP-AES法测定盐渍海蜇中的硼

目的:本文研究ICP-AES(Inductively Coupled Plasma-Atomic Emission Spectrometry)测定盐渍海蜇中硼的方法。方法:盐渍海蜇经水浴蒸干、灰化、消解,优化仪器的工作参数后采用ICP-AES上机测定。结果:ICP-AES能够准确测定盐渍海蜇中硼的含量,方法检出限为0.10mg/kg,相对标准偏差低于2%,回收率为97%～104%。结论:该方法操作简便、样品处理简单、干扰少,适合盐渍海蜇中硼的测定。     

ICP-AES法测定塑料中的钙铅钡

本文叙述了 ICP-AES 法测定塑料中钙、铅、钡的过程,方法简便,RSD 为1.2～10%,回收率96～98%。     

微波消解-ICP-AES法测定茶叶中钾、钠、磷、硫、铁、锰、铜、锌、钙、镁方法研究

通过优化微波消解条件,并根据不同元素性质,调谐ICP-AES工作条件至最佳,实现了茶叶中K、Na、P、S以及Fe、Mn、Cu、Zn、Ca、Mg 10种元素的同时测定。10种元素测定结果 RSD%为0.67(Cu)～5.57(Na),回收率为84.0%(Na)～101.5%(Fe),检出限为0.001(Mn)～0.029(S)μg·g-1,表明该方法准确可靠,能够满足茶叶中K、Na、P、S、Fe、Mn、Cu、Zn、Ca、Mg分析要求。     

基于磨损行为的单晶硅片化学机械抛光材料的去除特性

为了掌握化学机械抛光（CMP）过程中硅片表面材料的去除行为,根据CMP过程中硅片表面材料的磨损行为,建立了硅片CMP时的材料去除率构成成分模型,设计了不同成分的抛光液并进行了材料去除率实验,得出了机械、化学及其交互作用所引起的材料去除率.结果显示,机械与化学的交互作用率为85.7%～99.1%.磨粒的机械作用率为69.5%～94.0%,磨粒的机械与化学交互作用率为55.1%～93.1%.由此可见,磨粒的机械作用是化学机械抛光中的主要机械作用,磨粒与抛光液的机械化学交互作用引起的材料去除率是主要的材料去除率.研究结果可为进一步研究硅片CMP时的材料去除机理提供理论参考依据.     

ICP-AES同时测定磷灰石中的K、Na、Ca、Mg、Ti等元素

研究了电感耦合等离子体原子发射光谱(ICP-AES)同时测定磷灰石中的K、Na、Ca、Mg、Ti等元素。确定了各元素的检出限,回收率在97%-104%之间,RSD小于1.5%,该方法用于样品测定,结果令人满意。     

瓦楞形复层结构多孔铝过滤材料的制备、界面结构与性能

为实现常高温(200～250℃)工业烟气中微细固态颗粒的过滤,采用粉末增塑温压、伪半固态热压方法,制备了瓦楞形复层结构多孔铝过滤材料,并对其界面结构、性能(力学、过滤、常高温抗氧化)进行了研究。结果表明,瓦楞形复层结构的过滤层、支撑层孔径分别为20～25μm、40～45μm (A),以及1～10μm、19～48μm (B),孔隙率为50%～55%,层间微观形貌无明显分界,过滤层和支撑层实现了无缝连接,与胶合双层多孔铝平板相比,复层结构多孔铝平板屈服强度提高了31.58%。压差1.0～1.5 kPa时,两种瓦楞形复层结构多孔铝过滤材料的透气系数及过滤效率分别为(1.14～1.23) m³/(h·kPa·m²)、86%,以及(0.95～1.13) m³/(h·kPa·m²)、90%。瓦楞形复层结构多孔铝过滤材料250℃下的氧化速率为0.00735 mg/(cm²·h),氧化64 h后氧化膜停止生长,生成的Al₂O₃增大了孔壁、孔径由20～...     

天线罩透波材料研究

主要进行了甲基硅树脂基透波材料介电性能研究,结果表明,采用甲基硅树脂做为透波材料基体研制的高性能透波复合材料介电性能优良,材料经800～1200℃高温处理后在电磁波频率为9.30GHz时测试的介电常数小于3.5、材料透波率高达90%以上,能够满足雷达天线罩在800～1200℃工作时对天线罩材料的电性能要求,是比较理想的耐高温高性能透波复合材料.     

p,V, T and derived thermodynamic data for toluene,trichloromethane, dichloromethane,acetonitrile, aniline,and n-dodecane

Experimentally determined p,V,T data are reported for toluene, trichloromethane, dichloromethane, acetonitrile, aniline, and n-dodecane at 278, 288, 298, 313, and 323 K, except for dichloromethane, for which the highest temperature was 298 K. At each temperature, measurements were done at pressures up to about 280 MPa or (for aniline and n-dodecane) at a lower pressure slightly below the freezing pressure at the temperature of measurement. Values of the isobaric expansivity isothermal compressibility and (for toluene, trichloromethane, dichloromethane, and acetonitrile) internal pressure, derived from the p,V,T data, are presented.     

Optical properties of the metals Al, Co, Cu, Au, Fe, Pb, Ni, Pd, Pt, Ag, Ti, and W in the infrared and far infrared

Infrared optical constants collected from the literature are tabulated. The data for the noble metals and Al, Pb, and W can be reasonably fit using the Drude model. It is shown that -epsilon1(omega) = epsilon2(omega) approximately omega(2)(p)/(2omega(2)(tau)) at the damping frequency omega = omega(tau). Also -epsilon1(omega(tau)) approximately - (1/2) epsilon1(0), where the plasma frequency is omega(p).     

Dry Autoclaving for the Nanofabrication of Sulfides,Selenides, Borides,Phosphides, Nitrides,Carbides, and Oxides

This review compiles various nanostructures fabricated by a distinct “dry autoclaving” approach, where the chemical reactions are carried out without solvents; above the dissociation temperature of the chemical precursor(s) at elevated temperature in a closed reactor. The diversity to fabricate carbides (SiC, Mo₂C, WC), oxides (VOx‐C, ZnO, Eu₂O₃, Fe₃O₄, MoO₂), hexaborides (LaB₆, CeB₆, NdB₆, SmB₆, EuB₆, GdB₆), nitrides (TiN, NbN, TaN), phosphides (PtP₂, WP), sulfides (ZnS, FeS/C, SnS/C, WS₂, WS₂/C), and selenides (Zn_1‐xMn_xSe/C, Cd_1‐xMn_xSe/C), with various shapes and sizes is accounted with plausible applications. This unique single‐step, solvent‐free synthetic process opens up a new route in the growing nanomaterials science; owing to its considerable advantages on the existing approaches.     

抓管理重服务求可靠要效益--记广西计量测试研究所国家实验室认可工作

我所2001年9月份顺利地通过了中国实验室认可委紧张而严格的评审,得到了权威机构认可,成为西南地区较早通过国家实验室认可的省级计量校准机构.在建立质量体系、运行质量体系走过了艰辛之路,我们将全所职工的艰辛之路介绍给大家,希望能给将要申请认可的实验室得以参考.     

标准·质量·认证·会议(英文)

Standards IGRS:First Complete International Standards System in 3C Collaboration Field After ISO and IEC released three international standards of Intelligent Grouping and Resource Sharing (IGRS) including Core Protocol,File Communication Framework and Device Validation,four standards of IGRS,Application Framework,Basic Application,Service Types and Devices Types,got approved with high passing rate in the voting of Final Draft International Standard (FDIS) and will be officially issued soon around the world. It symbolizes that all     

Powder X-Ray Reference Patterns of Sr2RGaCu2Oy (R = Pr,Nd, Sm,Eu, Gd,Dy, Ho,Er, Tm,and Y)

X-Ray Rietveld refinements were conducted on a series of eleven lanthanide phases, Sr₂RGaCu₂O_y (2112 phase, R = Pr, Nd, Sm, Eu, Gd, Dy, Ho, Y, Er, Tm, and Yb) that are structurally related to the high T_c superconductor Ba₂YCu₃O₇ (213). In the 2112 structure, instead of square planar Cu-O chains, tetrahedral GaO4 chains were found to run in a zig-zag fashion along the diagonal of the basal 213 ab-direction. Reference powder patterns for these compounds were prepared by using the Rietveld decomposition technique. The unit cell volume of these compounds follows the expected trend of the lanthanide contraction. The lattice parameters range from a = 22.9694(3) Å, b = 5.5587(2) Å, and c = 5.44743(7) Å for R = Pr, to a = 22.8059(2) Å, b = 5.46031(5) Å, and c = 5.37773(5) Å for R = Yb. An electon diffraction study of the Sm- and Er-analogs showed characteristic diffuse streaks along the b-axis, suggesting some disorder within the GaO₄ chains.