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排序方式: 共有103条查询结果,搜索用时 62 毫秒
1.
中碱值硫化烷基水杨酸钙的制备及性能研究 总被引:1,自引:0,他引:1
介绍了一种碱值达170mgKOH/g以上、硫含量大于3.0%、钙含量大于6.0%的硫化烷基水杨酸钙盐润滑油添加剂的制备过程及其性能。实验中重点考察了促进剂及硫磺加入量对产品碱值及硫含量的影响;通过冷冻蚀刻电镜法观察了含碳酸盐的胶体粒子结构及粒度分布情况;应用凸轮挺校、四球试验机等考察了硫化烷基水杨酸钙盐产品的极压抗磨性能。结果表明,硫化烷基水杨酸钙产品不但具有良好的高温洁净性、抗氧化安定性、胶体稳定性,而且具有突出的极压抗磨性及热稳定性。 相似文献
2.
介绍衬胶防腐在湿法磷酸生产中的应用 ,特别是真空设备设计衬胶防腐的要点以及目前我国湿法磷酸装置中国产 (含合资、独资企业 )胶板的特点和选用、施工中应注意的事项。 相似文献
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《International Journal of Hydrogen Energy》2021,46(74):36848-36858
In2S3-NiS co-decorated MoO3@MoS2 (INS/MoO3@MoS2) heterojunctions were prepared in nonthermal plasma via the in-situ sulfurization for enhancing the solar-light photocatalytic conversion of CO2 into CH4 and CO at 423 K. In contrast with hexagonal h-MoO3 nanorods, CH4 and CO yields were enhanced by h-MoO3@MoS2 and In2S3/MoO3@MoS2, while the increased CH4 yield and decreased CO yield were obtained by INS/MoO3@MoS2 and NiS/MoO3@MoS2. The optimal 3-INS/MoO3@MoS2 with a nominal NiS-In2S3 content of 5.0 wt% and a In/Ni molar ratio of 2:1 exhibited the best photoreduction activity of CO2, of which CH4 and CO yields were 49.11 and 6.19 μmol g−1 h−1, respectively. It's ascribed to the tight interface for enhancing the visible-light absorption capacity and reinforcing the transfer and separation of charge carriers. S-rich sites and O vacancies were favorable for the adsorption and photoreduction of reactants on the bulks surface. The nonthermal plasma induced in-situ sulfurization was thus a promising route to fabricate metal sulfides-based heterojunctions. 相似文献
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Yifei Li Akshay Singh Kate Reidy Seong Soon Jo Frances M. Ross Rafael Jaramillo 《Advanced functional materials》2020,30(36)
The synthesis of large‐area TiS2 thin films is reported at temperatures as low as 500 °C using a scalable two‐step method of metal film deposition followed by sulfurization in an H2S gas furnace. It is demonstrated that the lowest‐achievable sulfurization temperature depends strongly on the oxygen background during sulfurization. This dependence arises because Ti? O bonds present a substantial kinetic and thermodynamic barrier to TiS2 formation. Lowering the sulfurization temperature is important to make smooth films, and to enable integration of TiS2 and related transition metal dichalcogenides—including metastable phases and alloys—into device technology. 相似文献
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Natural graphite (NG) was sulfurized by heat-treating or by high energy ball-milling the blend of NG with sulfur powder. The effect of the surface functional groups, containing sulfur, on the performance of the NG anode for a lithium ion battery was then investigated. X-ray photoelectron spectroscopy revealed that the sulfur was introduced onto the surface of NG in both of these methods. The results of scanning electron microscopy and Raman spectroscopy showed that the surface disorder of NG increased after sulfurization. Charge/discharge tests showed that the reversible capacity of the first cycle was increased after surface sulfurization and that the coulombic efficiency of the first cycle increased for the heat-treated sample but decreased for the ball-milled one. The change in the electrochemical performance was due to a number of factors including an increase in new active sites for lithium storage and an increase in surface area and increased disorder of the sulfurized NG samples. 相似文献
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《Progress in Photovoltaics: Research and Applications》2017,25(1):113-122
Because of its tunable band gap and band position, Sb2(Se1 − x Sx )3 (0 ≤ x ≤ 1) is a promising light‐absorbing material for photovoltaic device applications. However, no systematic study on the synthesis and characterization of single‐phase polycrystalline Sb2(Se1 − x Sx )3 thin films has been reported. Through introducing in situ sulfurization into the rapid thermal evaporation process, a series of single‐phase, highly crystalline Sb2(Se1 − x Sx )3 films with x = 0.09, 0.20, 0.31, and 0.43 were successfully obtained, with the corresponding band gap, band position and film morphology fully revealed. Futhermore, solar cells with superstrate ITO/CdS/Sb2(Se1 − x Sx )3/Au structure were fabricated and carefully optimized. Finally, a champion device having 5.79% solar conversion efficiency was obtained employing uniform Sb2(Se0.80S0.20)3 absorber layer. Our experimental investigation confirmed that Sb2(Se1 − x Sx )3 is indeed a very promising absorber material worth further optimization. Copyright © 2016 John Wiley & Sons, Ltd. 相似文献
10.
新开发的NC980 2催化剂 ,以γ Al2 O3 和TiO2 为载体 ,以Ni ,Mo ,Co为活性组分 ,具有反应活性高 ,对进料硫含量适应范围宽 ,耐低硫活性好 ,采用自然硫化等特征 ,可广泛用于天然气、焦化干气、炼厂干气等的加氢精制。 相似文献