High temperature properties of by-product cold bonded pellets containing blast furnace flue dust

In this investigation, the fundamental reactions occurring during the heat treatment of cold bonded pellets (CBP) comprised of iron and steelmaking by-products have been studied. Blast furnace (BF) flue dust, which contains fractions of coal and coke particles, has been included in the CBP blend as a source of solid reductant. Thermal analysis was performed on CBP samples in inert atmosphere at a heating rate of 10 °C/min in order to observe their high temperature properties, specifically, the mechanisms of self-reduction within CBPs. Both endothermic and exothermic reactions were observed during heating. The gases generated during thermal analysis were analyzed using a quadropole mass spectrometer (QMS). Furthermore, CBP samples heated to several different temperatures and quenched in argon were analyzed using X-ray diffraction (XRD) and scanning electron microscopy (SEM). Results from this investigation demonstrate that the decomposition of hydrates and carbonates in CBP samples contribute, as gaseous intermediates, to an earlier reduction of contained iron oxides. The gaseous intermediates are responsible for an initial gasification of carbon contained in blast furnace flue dust leading to low temperature iron oxide reduction. The step-wise reduction of iron oxides in CBPs at the given conditions begins at ∼500 °C and is nearly completed at 1200 °C. This work can help to provide a fundamental understanding of the reduction characteristics of iron and steelmaking by-product agglomerates.     

Influence of calcium binding proteins on the precipitation of calcium carbonate: A kinetic and morphologic study

In our experiments, the thermodynamic effect of calcium binding proteins (CBP) on the growth of calcium carbonate (CaCO₃) was studied in vitro. The CaCO₃ crystals obtained in systems with and without CBP were characterized by scanning electron microscope (SEM), Fourier Transform Infrared spectrograph (FT‐IR) and powder X‐ray diffractometer (XRD). The kinetic process was studied by monitoring the conductivity and pH value, which revealed the obvious inducement effect of CBP on the CaCO₃ crystals growth, and the possible formation mechanism of CaCO₃ in CBP solution was discussed. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)     

Azeotropic behavior of Dieterici binary fluids

The results of the present study point to the fact that the EOS of Dieterici is able to predict single azeotropy ending at zero temperature. In addition, the EOS of Dieterici is able to predict polyazeotropy, as in the case of van der Waals-type models, and even three azeotropes for binary systems.     

Chromatographic and related studies of alkylamide phases

Summary A series of chemically bonded phases has been prepared with amide groups localized by means of hydrophobic ligands. The physicochemical and chromatographic properties of such phases with chain lengths ranging from C₅ to C₈ have been examined by porosimetry, elemental analysis, solid-state NMR, and liquid chromatography. Subsequently, the conformational dynamics of these phases have been investigated by analyzing the dependence of the capacity factor (k) on the reciprocal of temperature for different organic compounds. Special emphasis has been given to the reproducibility of retention data obtained before and after temperature-dependent measurements.This work was presented at the 9th International Symposium: Advances and Applications of Chromatography in Industry, Bratislava, Slovakia, August 29–September 3, 1993.     

CBP有机薄膜对MEH-PPV聚合物发光二极管性能的影响

以聚合物发光材料MEH-PPV为发光层的聚合物发光二极管的ITO阳极与发光层之间,加入一层溶解于氯仿中的有机小分子CBP,能显著改善发光器件的电流特性。在电压较低的时候能提高电流,在电压较高的时候能抑制电流,从而增加工作电压范围。此外,器件的电流效率也能得到显著的提高。实验结果表明,加入CBP层后,在低电压时,CBP层能够减缓空穴注入到发光层中,将其限制在CBP层,从而在器件中形成一个内电场,有助于电子的传输,降低开启电压,提高发光亮度。在电压较高时,CBP作为电子阻挡层,能阻挡电子漏泄到阳极,从而使在复合区的空穴与少数载流子电子的复合效率提高,改善器件的性能。     

含有联苯咔唑的富勒烯C60/C70衍生物的合成、 电化学性质和双光子吸收研究

富勒烯C60/C70与肌氨酸和联苯咔唑醛的1,3-偶极环加成反应, 获得了富勒烯C60/C70-联苯咔唑衍生物3和4, 用1H NMR, 13C NMR, MALDI-TOF-MS表征其结构; 研究了化合物3和4的紫外、荧光和电化学性质; 利用激光光解、Z扫描方法研究其双光子吸收特性.     

NPB:CBP复合空穴传输层对黄色有机电致发光器件的影响

采用N, N'-diphenyl-N, N'-bis(1-naphthyl-pheny1)-1, 1'-biphenyl-4, 4'-diamine (NPB):4, 4'-N, N'-dicarbazole-biphenyl (CBP) 掺杂体系为复合空穴传输层,制备了结构为indium-tin oxide (ITO)/NPB:CBP/CBP:bis iridium (acetylacetonate) /2, 9-dimethyl-4, 7-diphenyl-p 关键词： 有机电致发光器件(OLEDs) 复合空穴传输层 NPB:CBP 器件性能     

高效液相色谱法测定菌群降解纤维素产物中的糖、有机酸和醇

采用硫酸除钙和调节pH的样品预处理方法,利用高效液相色谱对菌群降解纤维素发酵液中的糖、有机酸和醇3类物质进行分析,待测组分与培养基成分能够得到有效分离。从菌群降解纤维素发酵液中检出纤维二糖、葡萄糖、乙醇、丁醇、甘油、乙酸与丁酸并进行了定量分析,7种组分的检出限范围为0.10~2.00 mg/L,线性相关系数均大于0.9996,线性范围为0.020~1.000 g/L,回收率为85.41%~115.60%,相对标准偏差(RSD)为0.22%~4.62%(n=6)。该方法准确可靠,可实现对菌群降解纤维素发酵液中糖、醇和有机酸的同时准确测定。     

以CBP为主体的高色纯度红色磷光有机电致发光器件

以铱配合物红色磷光体Ir(piq)2(acac)为掺杂剂,制备了基于CBP材料的一系列红色电致磷光器件(PLED),其结构为ITO/CuPC(1nm)/Ir(piq)2(acac):CBP(25nm)/BCP(10nm)/Alq3(35nm)/LiF(1nm)/Al(100nm),对4种不同的掺杂剂浓度进行了比较,研究了它们的电致发光特性。得出了Ir(piq)2(acac)的最佳掺杂比为8%,此时器件的色坐标都非常接近标准红色,且色纯度超过了98%以上;在16V时,色坐标为(x=0.67,y=0.32),色纯度为99.74%,基本满足了全色显示对红色发光的要求。