缓冲气体及温度对DPAL输出性能的影响

为进一步提高半导体激光泵浦碱金属蒸汽激光器输出功率,基于三能级速率方程的理论模型,对DPAL的运行进行了模拟,考虑泵浦光带宽,在纵向泵浦的情况下,对缓冲气体气压、增益池长度、温度等参量对激光器输出光强及光光效率的影响进行了计算机模拟,结果表明,一定泵浦光下光光效率随着乙烷气压和温度增加而增大,对一定氦气气压有最大值,模拟结果为实验研究提供了有益的参考。     

Oxidation pretreatment to reduce corrosion of 20%Cr-25%Ni-Nb stainless steel. II. Surface morphology and oxide characterization

Improved corrosion behavior of 20%Cr-25%Ni-Nb steel resulting from a low pressure oxidation pretreatment in CO2 has been related to changes in elemental composition and distribution in the oxide scale. Auger electron spectroscopy, secondary ion mass spectroscopy, electron microprobe, and X-ray diffraction techniques have been used to investigate the properties of the oxide scale formed on both untreated and pretreated specimens when oxidized at 823 K and 923 K in a CO₂-1%CO atmosphere. A sputter ion plating technique has been used to separate the oxide from the metal and the incorporation of chromium and silicon at the metal-oxide interface has been investigated at grain centers and grain boundaries by depth profiling. The improvement in oxide adhesion and oxidation rates, using data from Parts I and II of this study, is assessed in terms of oxide formation by solid-state displacement reactions.     

中国造纸工业的发展与碱回收和环境保护

本文介绍了现代化造纸企业，防治污染、保护环境的基本经验，回顾了中国造纸工业碱回收的基本情况，建议中国的造纸企业应合理调整其经济规模，采用成熟先进的工艺技术，加强科学管理，使企业向现代化的方向发展；中国的造纸工业和环境保护，将会得到同步的健康发展。     

超临界二氧化碳富集提纯鱼油中EPA和DHA的研究进展（Ⅱ）鱼油的预处理和实验装置

综述了近年来人们用超临界二氧化碳（ＳＣ－ＣＯ_２）从鱼油中富集提纯ＥＰＡ（廿碳五烯酸）和ＤＨＡ（廿二碳六烯酸）的各类实验装置。讨论了鱼油的预处理方法、萃取操作条件对ＳＣ－ＣＯ_２提纯ＥＰＡ和ＤＨＡ的纯度和收率的影响。介绍了一个工业化双塔连续逆流萃取模拟流程。对我国鱼油资源的利用进行了分析。     

一种超粗化表面处理用于改善沉锡脱油的工艺探讨

沉锡工艺是一种代替传统热风整平的新型环保工艺,但沉锡工艺中的脱油问题一直是难以解决的问题,现通常方法是使用专用耐沉锡油墨或前处理使用超粗化药水处理板面,提高油墨和铜面的结合力,前两种方法的生产成本大大升高;本文根据现有的前处理方式,实验出适合沉锡使用的阻焊前处理方式,并列举该方式的具体应用。     

Grain Boundaries in Cu(In,Ga)Se2: A Review of Composition–Electronic Property Relationships by Atom Probe Tomography and Correlative Microscopy

Cu(In,Ga)Se₂ thin-film solar cells have attracted significant research interest in recent decades due to their high efficiency in converting solar energy into electricity for enabling a sustainable future. Although the Cu(In,Ga)Se₂ absorber can be grown as a single crystal, its polycrystalline form is dominating the market not only due to its lower costs, but also due to its unexpectedly higher cell efficiency. However, this absorber contains a high fraction of grain boundaries. These are structural defects where deep-trap states can be localized leading to an increase in recombination activity. This controversy is mirrored in the existing literature studies where two main contradictory believes exist: 1) to be crucial grain boundaries in Cu(In,Ga)Se₂ absorber are anomalous, being benign in terms of cell performance, and 2) grain boundaries are regions characterized by an increased recombination activity leading to deteriorated cell performance. Therefore, the present review tackles this issue from a novel perspective unraveling correlations between chemical composition of grain boundaries and their corresponding electronic properties. It is shown that features such as Cu depletion/In enrichment, segregation of 1-2at.% of alkali dopants, and passivation by a wide-bandgap or type inversion at grain boundaries are crucial ingredients for low open-circuit voltage loss and, hence, for superior cell performance.     

Non-Flammable Liquid and Quasi-Solid Electrolytes toward Highly-Safe Alkali Metal-Based Batteries

Rechargeable alkali metal (i.e., lithium, sodium, potassium)-based batteries are considered as vital energy storage technologies in modern society. However, the traditional liquid electrolytes applied in alkali metal-based batteries mainly consist of thermally unstable salts and highly flammable organic solvents, which trigger numerous accidents related to fire, explosion, and leakage of toxic chemicals. Therefore, exploring non-flammable electrolytes is of paramount importance for achieving safe batteries. Although replacing traditional liquid electrolytes with all-solid-state electrolytes is the ultimate way to solve the above safety issues, developing non-flammable liquid electrolytes can more directly fulfill the current needs considering the low ionic conductivities and inferior interfacial properties of existing all-solid-state electrolytes. Moreover, the electrolyte leakage concern can be further resolved by gelling non-flammable liquid electrolytes to obtain quasi-solid electrolytes. Herein, a comprehensive review of the latest progress in emerging non-flammable liquid electrolytes, including non-flammable organic liquid electrolytes, aqueous electrolytes, and deep eutectic solvent-based electrolytes is provided, and systematically introduce their flame-retardant mechanisms and electrochemical behaviors in alkali metal-based batteries. Then, the gelation techniques for preparing quasi-solid electrolytes are also summarized. Finally, the remaining challenges and future perspectives are presented. It is anticipated that this review will promote a safety improvement of alkali metal-based batteries.     

浅谈光伏电缆的研制

随着太阳能的开发和利用,光伏发电已成为开发太阳能的主要途径,积极开发作为传输部件的光伏电缆具有重要意义。为了满足光伏系统在户外恶劣环境条件下的工作要求,开发了太阳能发电用光伏电缆,它具有耐高低温性能好、耐紫外线能力强、耐酸碱化学腐蚀性高、耐磨性能好、使用寿命长及低烟无卤阻燃等优点。     

工艺过程中生瓷带收缩问题研究

HTCC/LTCC的工艺过程中经常会出现生瓷带收缩现象,由此现象引起的系列工艺问题众多,尤其对于多层互连结构的产品影响很大,而一些工艺环节会加重生瓷带收缩现象出现的频率、收缩的程度。文章对于生瓷带收缩现象的产生原因进行了较为详细的分析与阐述,同时针对生瓷带收缩问题采用生瓷带预处理工艺,并着重对不同的预处理工艺进行试验对比。不同的生瓷带预处理工艺各有利弊,可以根据产品的各自特点综合考虑,采用合适的工艺方法对生瓷带收缩问题加以解决。     

基于C8051F020海水预处理模块测控系统设计

根据对海水预处理模块控制要求的分析研究,提出设计一套能同时调节海水温度和流量的预处理模块控制器,该控制器使用Cygnal公司8位微处理器C8051F020作为主芯片,并给出了测控模块软、硬件设计方案,该控制器已经在海水预处理模块上试验成功。试验结果表明,该控制器设计稳定,具有很好的工程应用价值。