从水淬渣中回收镓的试验研究

对鼓风炉（ISP法）或烟化炉水淬渣中回收镓的工艺进行了研究。结果表明，利用浓硫酸恒温熟化的独特浸出工艺，克服硅对液固分离的影响；以伯胺N9123作为萃取剂在硫酸介质中萃取镓；获得了含镓品位为2.82%的富集物。     

Co_3O_4纳米粒子的表面接枝改性研究

以含乙烯基的硅烷偶联剂(A-151)处理Co3O4纳米粒子,在Co3O4粒子表面引入乙烯基,然后以K2S2O8为引发剂,十二烷基苯磺酸钠(SDBS)为乳化剂,采用乳液聚合,在Co3O4粒子表面接枝甲基丙烯酸丁酯,研究了影响Co3O4纳米粒子表面接枝的有关因素,并优化工艺参数。采用红外光谱、X射线光电子能谱等手段对表面接枝进行了表征。结果表明,甲基丙烯酸丁酯已经被成功地接枝到纳米Co3O4粒子的表面。热流传感器的热流灵敏度测试结果表明,Co3O4粒子表面改性后,它与硅树脂的复合涂层提高了热流传感器的热流灵敏度,相对于未处理的Co3O4粒子涂层,传感器灵敏度从0.052 mV.cm2/W提高到了0.065 mV.cm2/W。     

我国的锑深加工产品

介绍了目前我国锑深加工产品的种类、用途、主要生产厂家 ,以及某些产品的生产工艺和质量状况。并针对国内锑品现状 ,提出了几点建议     

合成2,4-二叔丁基苯酚工业试验

以离子交换树脂为催化剂，苯酚和甲基叔丁基醚为原料合成2，4-二叔丁基苯酚(简称2，4酚)，合成产物经过滤再经间歇真空精馏精制提纯，得到高纯度的2，4酚成品。成品精馏后釜中残液在酸性白土催化剂的作用下通过歧化反应生成对叔丁基苯酚，再经精馏提纯得到成品对叔丁基苯酚。通过工艺优化，使2，4酚、对叔丁基苯酚形成联产生产工艺，降低了生产原料消耗和成本。     

新标准新突破--MP4NET引领安防行业发展

介绍了视频压缩技术从MPEG1、MPEG2到目前主流技术MPEG4,分析了数字视频存储、检索、传输上优于模拟技术的特点,从而使视频网络应用,数据库支撑的应用、安防行业的数字化应用的迅速发展。     

Microstructural Investigation on Failure of Internal Drive Shaft

17-4 PH stainless steel is used as internal drive shaft material in liquid engine pumps. One of the drive shafts failed during operation. The shaft pieces were in contact for short duration after failure, which has resulted in abrasion of fractured surfaces. Samples from the location of failure were taken, and investigation of the failure was carried out using optical and scanning electron microscopy. The microstructural analysis of the material and fractographic analysis of the fractured surface show that the failure was caused by excessive torsion.     

兼容IPv4及IPv6的网络程序设计

介绍了在Window系统中设计兼容IPv4及IPv6的网络程序的方法,并给出了用WinsockAPI编程的具体步骤。     

Influence of Ni Interlayers on the Mechanical Properties of Ti6Al4V/(WC-Co) Friction Welds

Ni interlayers were introduced prior to dissimilar friction welding of Ti6Al4V base material to three cemented carbide substrates. The fracture strength of Ti6Al4V/(WC-6 wt% Co) welds were poor and were markedly improved when 20-µm thick Ni interlayers were introduced prior to dissimilar friction welding. These results were only produced when the (WC-6 wt% Co) cermet was electroplated prior to friction welding. When the Ti6Al4V alloy was electroplated prior to friction welding, fractured WC particles and cracking were observed in the (WC-Co) carbide substrate. The fracture strengths of Ti6Al4V/(WC-11 wt% Co) and Ti6Al4V/(WC-24 wt% Co) welds were not improved when 20-µm thick Ni interlayers were introduced prior to friction welding. During mechanical testing, the Ni layer retained at the dissimilar joint interface created a region of weakness.     

Synthesis of chemically and structurally modified dicalcium silicate

This paper describes the synthesis of cements, chemically and structurally related to Ca₂SiO₄. Silica was obtained from rice hull after heating at 600 °C. Calcium oxide and small amounts of barium chloride were mixed in order to obtain a final (Ca/Si) or (Ca+Ba)/Si ratio equal to 1.95, 1.90, and 1.80, which is lower than in the conventional cement. The solids were mixed and ultrasonically treated for 1 h with a water/solid ratio of about 20. After drying and grinding, the mixtures were heated up to 1100 °C. It was possible, in some cases, to obtain a cementitious material. These cements are structurally related to β-Ca₂SiO₄ and the lower (Ca+Ba)/Si ratio obtained was 1.95. The initial chemical compositions of these cements are: (Ca_1.83+Ba_0.12)SiO₄ and (Ca_1.79+Ba_0.16)SiO₄. A further lowering in the (Ca+Ba)/Si ratio changes the nature of the silicates.