H12型氮氢压缩机低压气阀故障分析

本文收集Ｈ１２型氮氢压缩机１、２级１９４件进口气阀和１０３件出口气阀的使用寿命和失效模式，经统计分析和失效分析后，表明弹簧是气阀关键零件。控制簧丝硬度，改善热处理工艺，提高其抗硫化、抗氧化性能及妥善保管后能大幅度延长气阀寿命。     

离子渗硫模具钢的摩擦磨损机理研究

对模具钢5CrNiMo进行低温离子渗硫处理，表现得到了厚约10μm的渗硫层。在MM－200型摩擦磨损试验机上进行了渗硫层干摩擦条件下的摩擦学试验。利用原子力显微镜（AFM）和扫描电镜（SEM）观察了渗硫层的表面、截面与磨痕形貌；利用X射线衍射仪（XRD）分析了渗硫层的相结构；利用扫描俄歇微探针（SAM）分析了表面元素沿深度的分布。渗硫层表面多孔且不平，由纳米尺度的微粒随机叠嵌而成。渗硫层的纳米结构有利于改善其减摩耐磨性能。摩擦磨损结果表明，模具钢渗硫层的摩擦学性能明显优于未渗表面。     

CoMoP/γ-Al_2O_3催化剂微观结构形成过程的研究

采用HRTEM、XRD、LRS研究不同金属含量CoMoP/γ-Al_2O_3催化剂。结果表明,硫化钼层数和尺寸与氧化态催化剂中金属的赋存状态有直接相关性。金属含量较低时,随金属含量增加,氧化态催化剂中金属颗粒尺寸和硫化态催化剂中硫化钼层数和尺寸均逐渐增加。金属含量较高时,氧化态催化剂中出现大颗粒的含钼氧化物,硫化态催化剂硫化钼层数和尺寸随金属含量增加变化不明显。     

钴钼耐硫变换催化剂在单醇生产中的应用

介绍了钴钼耐硫变换催化剂在单醇生产中较传统变换催化剂具有的优势,同时阐述了此类催化剂在应用方面应控制的条件。     

新型锂电池正极材料多硫代聚苯乙烯的制备

以氯代聚苯乙烯为原料,制备了锂电池新型正极材料多硫代聚苯乙烯,考察了反应温度对产物硫化效果的影响,并以该产物作为正极活性物质组装成模拟电池,进行了放电性能测试,结果表明硫质量分数78．07％的多硫代聚苯乙烯放电容量高达539mAh／g。     

Passivation of GaSb by sulfur treatment

Some features of the band structure of GaSb have led to a renewed interest in this material. It is well known that Ga(Al)Sb alloys are good candidates to realize avalanche photodetectors, due to their high hole kp/electron kn ionization coefficient ratio. In addition, recent studies have shown GaSb to be attractive for realizing tunneling barriers exhibiting a high value of the peak-to-valley current ratio or IR photodectectors. In order to optimize such devices, the passivation of GaSb is of great interest. Unfortunately, very few investigations have been reported in the literature on GaSb passivation. This paper reports experimental results concerning GaSb surface passivation using a chemical sulfuration method. Physicochemical analysis is attempted through ellipsometric, photoluminescence, and Auger electron spectroscopy measurements. Polluting oxygen and carbon agents are found to be removed from the surface using this process, leading to Schottky diodes of better quality. In addition, the sulfur treatment is shown to stabilize the cleaned surface.     

玻利维亚图皮萨混合铜矿选矿试验研究

玻利维亚图皮萨铜矿石属于混合铜矿石,含铜1.65%,铜的氧化率为28.48%。针对该矿石性质进行了浮选试验研究,采用直接浮选先浮硫化铜矿物,再用硫化浮选法浮氧化铜矿物,硫化浮选以丁基黄药+丁基铵黑药+羟肟酸组合作为捕收剂强化对氧化铜矿物的捕收。闭路试验获得铜品位为20.48%,铜回收率为61.77%的硫化铜精矿及铜品位为13.29%,回收率为19.28%的氧化铜精矿,总铜回收率为81.05%,试验研究为该矿的开发利用提供了技术依据。     

Sulfuration of hierarchical Mn-doped NiCo LDH heterostructures as efficient electrocatalyst for overall water splitting

Constructing efficient bifunctional electrocatalysts for both cathode and anode is of great importance for obtaining green hydrogen by water splitting. Herein, sulfuration of hierarchical Mn-doped NiCo LDH heterostructures (Mn–NiCoS₂/NF) is constructed as a bifunctional electrocatalyst for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) via a facile hydrothermal-annealing strategy. Mn–NiCoS₂/NF shows an overpotential of 310 mV at 50 mA cm⁻² for OER and 100 mV at 10 mA cm⁻² for HER in 1.0 M KOH. Moreover, only 1.496 V@10 mA cm⁻² is required for overall water splitting by using Mn–NiCoS₂/NF as catalyst dual electrodes in a two-electrode system. The excellent performance of Mn–NiCoS₂/NF should be attributed to the ameliorative energy barriers of adsorption/desorption for HO⁻/H₂O through the modification of electronic structure of NiCo basal plane by Mn-doping and the acceleration of water dissociation steps via rich delocalized electron inside sulfur vacancies. The construction of hierarchical Mn–NiCoS₂/NF heterostructures provides new prospects and visions into developing efficient-advanced electrocatalysts for overall water splitting.     

高温芯线乙丙橡胶绝缘层挤出工艺探讨

文中通过介绍产品结构特点及工艺流程，从模具设计入手，对如何在连续硫化生产线上挤出YE型高温乙丙橡胶绝缘芯线进行了探讨，使挤出质量达到非常高的标准。到目前为止，芯线一次交试合格率达99％以上，满足了用户的要求，并且大大降低了材料成本，实现了降本增效的目标。     

Large-scale and facial fabrication of PbS nanorods by sulfuration of a Pb sheet

PbS nanostructures were synthesized by sulfuration of lead sheets in a tube furnace under sulfur ambiance. The lead sheets were placed in different temperature zones, between 330 and 470 °C. Field emission scanning electron microscope (FESEM) images showed that only the lead sheet placed at 330 °C showed nanorods morphology. The prepared nanorods exhibited a rectangular shape with an average diameter of 95 nm and an average length of 400 nm. The phase and composition of the product were identified by x-ray diffraction (XRD) pattern and x-ray photoelectron spectra (XPS). The pattern indicated that these PbS nanorods were with a cubic phase and the XPS result showed binding energy for lead and sulfur that belonged to PbS structure. In addition, Raman measurements confirmed the XRD pattern and XPS results and indicated three Raman active modes, which belonged to PbS phase for the nanorods. The optical properties of the products were characterized by UV–visible and room temperature photoluminescence (PL) spectrometers. The optical characterization results showed a band gap for the PbS nanorods in the infrared region.