When It's Heavier: Interfacial and Solvation Chemistry of Isotopes in Aqueous Electrolytes for Zn-ion Batteries

The electrochemical effect of isotope (EEI) of water is introduced in the Zn-ion batteries (ZIBs) electrolyte to deal with the challenge of severe side reactions and massive gas production. Due to the low diffusion and strong coordination of ions in D₂O, the possibility of side reactions is decreased, resulting in a broader electrochemically stable potential window, less pH change, and less zinc hydroxide sulfate (ZHS) generation during cycling. Moreover, we demonstrate that D₂O eliminates the different ZHS phases generated by the change of bound water during cycling because of the consistently low local ion and molecule concentration, resulting in a stable interface between the electrode and electrolyte. The full cells with D₂O-based electrolyte demonstrated more stable cycling performance which displayed ∼100 % reversible efficiencies after 1,000 cycles with a wide voltage window of 0.8–2.0 V and 3,000 cycles with a normal voltage window of 0.8–1.9 V at a current density of 2 A g⁻¹.     

负载型TiO2-聚酰亚胺亲水复合膜的制备与分离性能

采用溶解－流涎法，湿相转换法和干湿相转换法制轩了负载型ＴｉＯ２－聚酰亚胺亲水复合膜，采用扫描电镜，红外光谱，压汞和透气性实验等手段对该膜的孔径分布，表面结构及扩散性能进行了表征，并讨论了制备亲水对膜孔结构的影响，实验结果表明，三种膜均具有很好的亲水性能，而干湿相转换膜具有良好的孔径分布和分离性能。     

甲烷—空气燃烧中NOx生成的简化模型研究

用特征值－特征向量法对甲烷－空气燃烧时ＮＯＸ生成的化学反应机理进行了简化，得到了仅由１５个基元以应组成的简化反应模型。对比计算结果表明，该模型能在较宽燃空比内与全面模型很好吻合，因而可望用于燃烧过程数值模拟时对ＮＯＸ生成的预测     

辽河原油常压汽液平衡CORGC状态方程的预测

应用ＣＯＲＧＣ状态方程，根据正构烷烃模型分子法确定石油假组分的基团组成，仅需平均沸点一个物性多数，即可按假多元系法预测汽液相平衡常数和体系的泡点、露点温度．结果表明，预测精度与ＡＰＩ推荐的ＳＲＫ状态方程相当．     

固体基质室温燐光法测定苄氟噻嗪的研究

本文提出了以滤纸为固体基质的苄氟噻嗪(BFA)的室温燐光(RTP)测定法并讨论了适宜的烘干温度,烘干时间及燐光特性等。醋酸铅存在时,BFA能产生强的RFP,虽不通干燥气体,RTP强度也能在4分钟内保持稳定。与RTP强度成线性关系的BFA的浓度范围为10~(-6)—8×10~(-4)mol/L,相对标准偏差为5.3％,最低检出限为0.8ng。     

低阈值稳定基横模1.3μm InGaAsP/InP掩埋新月型激光器

采用二次液相外延技术研制了1.3μm InGaAsP/InP掩埋新月型激光器。测试结果表明,典型室温连续工作电流为20mA,最低10mA。在3～5倍阈值工作电流下仍能以稳定的基横模激射。     

Behavior of argon gas release from manganese oxide minerals as revealed by <Superscript>40</Superscript>Ar/<Superscript>39</Superscript>Ar laser incremental heating analysis

Manganese oxides in association with paleo- weathering may provide significant insights into the multiple factors affecting the formation and evolution of weathering profiles, such as temperature, precipitation, and biodiversity. Laser probe step-heating analysis of supergene hollandite and cryptomelane samples collected from central Queensland, Australia, yield well-defined plateaus andconsistent isochron ages, confirming the feasibility dating very-fined supergene manganese oxides by 40Ar/39Ar technique. Two distinct structural sites hostingAr isotopes can be identified in light of their degassing behaviors obtained byincremental heating analyses. The first site, releasing its gas fraction at thelaser power 0.2-0.4 W, yields primarily 40Aratm, 38Aratm, and 36Aratm (atmospheric Ar isotopes). The second sites yield predominantly 40Ar* (radiogenic 40Ar),39ArK, and 38ArK (nucleogenic components), at ～0.5-1.0 W. There is no significant Ar gas released at the laser power higher than 1.0 W, indicating the breakdown of the tunnel sites hosting the radiogenic and nucleogenic components. The excellent match between the degassing behaviors of 40Ar*, 39ArK, and 38ArK suggests that these isotopes occupy the same crystallographic sites and that 39ArK lossfrom the tunnel site by recoil during neutron irradiation and/or bake-out procedure preceding isotopic analysis does not occur. Present investigation supports that neither the overwhelming atmospheric 40Ar nor the very-fined nature of the supergene manganese oxides poses problems in extracting meaningful weathering geochronological information by analyzing supergene manganese oxides minerals.     

EDT毛化轧辊表面凹坑形成过程

针对轧辊表面电火花毛化过程中放电中心温度的变化、凹坑形状与电参数的关系等问题进行了研究.通过分析放电通道形成过程和热流密度分布函数,采用解析法建立了单个脉冲放电通道的热传导模型,并运用积分变换法和有限差分相结合的方法进行了温度场求解.讨论了轧辊表面在不同峰值电流下放电区域中心位置的瞬态温度变化,确立了峰值电流和脉冲宽度与熔化凹坑形状的关系.结果表明,理论计算值与实验结果相吻合,所建模型与采用的方法正确,可用于轧辊表面形貌形成过程的仿真.     

独乐寺观音阁动力特性实测分析

采用时域的主谐量法及频域的幅谱与相谱的方法，识别了观音阁南北向前三阶振型和东西向前三阶振型以及观音阁扭转固有频率，通过脉动法对独乐寺观音阁作了动力特性实测，吉年古阁能延年益寿。