浅谈改性隔膜扩张阳极电解槽的运行

介绍了改性隔膜扩张阳极电解槽的发展以及改性隔膜的制备。通过沈阳化工股份有限公司扩张阳极改性隔膜电解槽与普通隔膜电解槽运行情况的比较,说明扩张阳极改性隔膜电解槽节能显著,平均电压可降低0.1～0.2V,吨碱节电70～140kW·h,有强大的发展潜力。     

红外探测器薄壳杜瓦组件的瞬态钎焊热场分析

制冷型红外探测器是航天领域广泛应用的重要电子器件,主要由半导体芯片、杜瓦组件、制冷器等部件构成.其中薄壳杜瓦组件用于创造探测器内部的真空隔热环境,从而维持器件的低温工作.薄壳杜瓦组件是通过真空钎焊的方式加工生产的,设计合理的钎焊热场可预防零件形变、提高加工一致性,从而提升器件良率.对于机械强度较差的薄壳类零件,除稳态热...     

衬底温度对CZTSSe薄膜结构特性的影响

采用热蒸发法制备铟锌锡硫(CZTSSe)薄膜。采用低 温一步 法在300℃衬底温度下制备CZTSSe薄膜;采用两步法,即在衬底温度 分别为300℃制备CZTSSe 薄膜;将衬底温度设定为480℃不变,一步蒸发沉积CZTSSe薄膜。通 过对X射线衍射(XRD)、 扫描电镜(SEM)、拉曼谱对比发现,在300℃低温下一步法和300℃ 、480℃两 步法沉积的薄膜表面粗糙,碎小晶粒较多;在480℃一步高温法制备 的薄膜表面平整, 晶粒大小均匀,3个衍射峰的半高峰宽变窄,薄膜的结晶质量得到 改善,且没有发现其它杂相的拉曼特征峰,沉积出适合作为制备CZTSSe薄膜太阳电池的 吸收层。     

Research on structure of Cu2ZnSn(S, Se)4 thin films with high Sn-related phases

Cu2ZnSn(S, Se)4 (CZTSSe) thin films were deposited on flexible substrates by three evaporation processes at high temperature. The chemical compositions, microstructures and crystal phases of the CZTSSe thin films were respectively characterized by inductively coupled plasma optical emission spectrometer (ICP-OES), scanning electron microscopy (SEM), X-ray diffraction (XRD) and Raman scattering spectrum. The results show that the single-step evaporation method at high temperature yields CZTSSe thin films with nearly pure phase and high Sn-related phases. The elemental ratios of Cu/(Zn+Sn)=1.00 and Zn/Sn=1.03 are close to the characteristics of stoichiometric CZTSSe. There is the smooth and uniform crystalline at the surface and large grain size at the cross section for the films, and no other phases exist in the film by XRD and Raman shift measurement. The films are no more with the Sn-related phase deficiency.     

关于企业接轨国际经济的几个问题

90年代,中国进一步敞开大门,广泛接纳外商投资,大量外资涌进国内。在越来越开放的市场经济条件下,国内企业特别是国有大中型企业向何处去?我们应选择,立足国内,走向世界,加快与国际经济接轨,在更广的市场空间和更高的外向化层次上寻求新的更大突破。 势在必然 中国企业加快与国际经济接轨,是改革开放向广度发展的必然趋势。但从接轨国际经济看,我国的改革还不适应企业发展要求。诸如独立的国际投资权、国际贸易权、国际融资权、国际联     

单晶合金中孔洞对蠕变行为的影响

通过对有/无缺陷单晶镍基合金蠕变性能测试、组织形貌观察及采用有限元对近孔洞区域的应力场分析,研究了组织缺陷对单晶合金蠕变行为及组织演化的影响。结果表明:组织缺陷可明显降低单晶镍基合金的塑性和蠕变寿命。在高温蠕变期间,近孔洞区域的应力等值线具有碟形分布特征,并沿与施加应力轴成45°角方向有较大值,该应力分布特征可使合金中γ′相转变成与施加应力轴成45°角的筏状结构,并使圆形孔洞沿应力轴方向伸长成椭圆状。蠕变期间,在合金圆形孔洞缺陷的上、下区域具有较小的应力值,而在圆形孔洞的两侧极点处具有最大应力值,随蠕变时间延长,应力值增大,促使裂纹在该处萌生,并沿垂直于应力轴方向扩展是降低合金蠕变寿命的主要原因。     

Effect of head swing motion on hydrodynamic performance of fishlike robot propulsion

This paper studies the effect of the head swing motion on the fishlike robot swimming performance numerically.Two critical parameters are employed in describing the kinematics of the head swing: the leading edge amplitude of the head and the trailing edge amplitude of the head.Three-dimensional Navier-Stokes equations are used to compute the viscous flow over the robot.The user-defined functions and the dynamic mesh technology are used to simulate the fishlike swimming with the head swing motion.The results reveal that it is of great benefit for the fish to improve the thrust and also the propulsive efficiency by increasing the two amplitudes properly.Superior hydrodynamic performance can be achieved at the leading edge amplitudes of 0.05L( L is the fish length) and the trailing edge amplitudes of 0.08 L.The unsteady flow fields clearly indicate the evolution process of the flow structures along the swimming fish.Thrust-indicative flow structures with two pairs of pressure cores in a uniform mode are generated in the superior performance case with an appropriate head swing,rather than with one pair of pressure cores in the case of no head swing.The findings suggest that the swimming biological device design may improve its hydrodynamic performance through the head swing motion.     

浮式液化天然气技术综述

随着能源需求的不断攀升,小型边际气田、伴生气田及深海气田开发日益受到重视。浮式液化天然气(FLNG)生产装置具有投资低、建设周期短、可重复使用等优点,可灵活应用于环境条件恶劣的深海边际气田和小气田的天然气开采,是未来接收站发展的趋势和方向。结合国内外在这一技术上的研究现状论述了FLNG的两大装置:海上液化天然气生产储卸装置(FPSO)和浮式储存再气化装置(FSRU),详细分析了该装置的液化系统、卸货系统和再气化外输系统,提出了适用于FLNG的液化技术、卸载技术及再气化技术。     

深圳市大康河综合整治工程生态化治理研究

以大康河综合整治工程为背景对河道生态化整治进行研究,对工程涉及的防洪、水质、景观等基本现状进行评价,提出了生态治理的指导思想,并具体介绍了防洪、水质、景观等综合治理措施,通过对大康河的综合整治,使得工程既能满足防洪要求又能实现良好的生态景观效果。     

小型油藏群概念的提出及对油气勘探开发的意义

对松辽盆地中浅层岩性油藏聚集带的油藏特征进行了研究,提出了小型油藏群概念.岩性油藏油水分布复杂的根本原因在于它的小型油藏群特征.像葡西油田、东辛油田及文明寨油田等都是由多个规模较小的油气藏组成,它可能是纵向不同的油层组或同一油层组错叠的不同砂体,或者是平面上的不同小断块.具有小型油藏群特征的勘探区计算油气地质储量时,原...