盛钢桶衬镁碳砖及铝镁碳砖的显微结构分析

对盛钢桶衬残砖进行了显微结构分析，查明镁碳砖及镁铝碳砖长寿的原因。     

粘土及高铝中二氧化硅的分光光度法测定

在１００ｍｌ０．１５ｍｏｌ／ｌ盐酸介质中，加入氟化钾溶液将高聚合态的硅酸生成ＳＩＦ＋６＾２－，过量的Ｆ＾－加入硼酸络合，将经典的硅钼兰分光光度法应用于粘土及高铝中二氧化硅的测定。     

攀钢用铝镁碳砖综合砌筑钢包衬

攀钢钢包内衬原为铝镁浇注料，连铸投产后包衬寿命急剧下降，并常在渣线部位出现漏钢事故。为确保连铸正常生产，采用了铝镁碳砖和镁碳砖综合砌包工艺，模铸和连铸的典型试验和扩大试验表明效果良好，平均寿命为７８．３次。     

高抗氧化性镁炭砖的研制

以电熔氧化镁皮砂为多级颗粒料，二级电熔镁砂为细粉，采用廉价的非金属固体加入物及改性剂，以增强镁炭砖中起结合作用的碳网本身的抗氧化能力。研制的镁炭砖具有抗氧化性能好、热膨胀率低的特．点。该砖用于舞钢７５ｔｔ炉炉墙上，用后脱碳层仅为２０～３０ｍｍ，平均蚀损２．０５～２．９５ｍｍ／炉，使用寿命提高１６％以上．     

氢扩散性检测仪及测试方法的研究

国内首次研制成功的氢扩散性检测仪,采用QJ-80单板机对检测过程进行程序控制,气路可进行自动通断,屏幕显示检测全过程,并自动打印检测结果。仪器测量范围0～150mmH_2O,测量精度1.5%。若增加某些配件,.扩充其功能,还可对多孔材料和不定形耐火材料进行透气度和孔径分布的检测。试验证明,仪器稳定可靠、精度高、反应快、显示直观、结构紧凑、操作简便。既可对外提供检测服务,又可进行转让销售。     

砌体结构温度应力有限元分析

本文建立了砌体结构数值计算模型,采用该模型分析了砌体结构在温度荷载作用下的应力分布规律,初步掌握了温度荷载作用下砌体结构薄弱点的特征,为砌体结构裂缝控制提供理论依据。     

层状材料的催化作用

层状材料是一类具有规则层状结构的化合物,由于其层板上骨架阳离子的可替代性和层间离子的可交换性使其在催化领域用途广泛,其层板结构为开发具有高表面积、可调节孔径和体积的新型纳米材料提供了可能。介绍了近年来层状材料(层状钙钛矿、柱撑黏土和水滑石)在酸碱催化、光催化、环保以及生物精制等方面的应用及其研究进展     

浅析陶瓷薄板生产工艺

我国陶瓷砖产量多年来一直位居世界第一．且陶瓷行业又是高资源依赖行业．笔者就陶瓷薄板的生产工艺进行了浅显分析,以求达到进一步加快陶瓷砖薄型化的进程。     

Preparation of Polystyrene/Clay Nanocomposites by Free‐Radical Polymerization in Dispersion

Fully exfoliated PS/clay nanocomposites were prepared via FRP in dispersion. Na‐MMT clay was pre‐modified using MPTMS before being used in a dispersion polymerization process. The objective of this study was to determine the impact of the clay concentrations on the monomer conversion, the polymer molecular weight, and the morphology and thermal stability of the nanocomposites prepared via dispersion polymerization. DLS and SEM revealed that the particle size decreased and became more uniformly distributed with increasing clay loading. XRD and TEM revealed that nanocomposites at low clay loading yielded exfoliated structures, while intercalated structures were obtained at higher clay loading.

     

Synthesis and characterization of novel oligomeric poly(styrene‐co‐acrylonitrile)–clay complexes

Oligomeric poly(styrene‐co‐acrylonitrile) quaternary ammonium salts were prepared through reactions of trimethylamine with corresponding poly(styrene–acrylonitrile–vinyl benzyl chloride)s, which were synthesized by the free‐radical polymerization of a mixture of styrene, acrylonitrile, and vinyl benzyl chloride. Then, oligomeric poly(styrene‐co‐acrylonitrile)‐modified clays were prepared through the cation exchange of the sodium ions in the clay with the corresponding poly(styrene‐co‐acrylonitrile) quaternary ammonium salts. The poly(styrene–acrylonitrile–vinyl benzyl chloride)s, poly(styrene‐co‐acrylonitrile) quaternary ammonium salts, and their clay complexes were characterized with infrared spectroscopy, gel permeation chromatography, thermogravimetric analysis, proton nuclear magnetic resonance, X‐ray diffraction, and transmission electron microscopy. X‐ray diffraction and transmission electron microscopy studies showed that these novel clay complexes were well intercalated. Furthermore, thermogravimetric analysis data indicated that this series of polymerically modified clays had high enough thermal stability for nanocomposites by melt blending. The thermal treatment of one of these novel clays at 250°C under nitrogen was also conducted. Solubility and infrared studies of this thermally treated clay complex revealed that a novel polyimine/enamine structure clay complex had been formed in the gallery of the clay. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009