金属基复合材料实型熔铸颗粒强化技术的研究

把实型铸造与熔铸技术有机结合提出金属基复合材料颗粒强化新技术。通过在实型铸造的泡沫材料的特定部位，事先将高性能合金进行弥散分布处理，浇铸金属母液，在金属结晶凝固过程中，在保持基体材料成分及性能不变的情况下，一次性获得表层或内表层具有特殊性能的金属基复合材料铸件。复合材料层成分、组织由表层向基体呈梯度分布，厚度可控，可以进行机械后加工。     

Properties of Induction Plasma Sprayed Iron Based Nanostructured Alloy Coatings for Metal Based Thermal Barrier Coatings

Metal-based thermal barrier coatings (MBTBCs) have been produced using high frequency induction plasma spraying (IPS) of iron-based nanostructured alloy powders. The study of MBTBCs has been initiated to challenge issues associated with current TBC materials such as difficult prediction of their “in-service” lifetime. Reliability of TBCs is an important aspect besides the economical consideration. Therefore, the study of MBTBCs, which should posses higher toughness than the current TBC materials, has been initiated to challenge the mechanical problems of ceramic-based TBCs (CBTBCs) to create a new generation of TBCs. The thermal diffusivity (TD) (α) properties of the MBTBCs were measured using a laser flash method, and density (ρ) and specific heat (C _p) of the MBTBCs were also measured for their thermal conductivity (k) calculation (k = αρ C _p).     

金属基复合透明导电膜的研究

透明导电薄膜作为一种新型的光电材料显示出多种优异的光电性能和具有广泛的应用背景。综述了金属基复合透明导电膜的发展历程与研究现状，重点讨论了电介质，金属，电介质（D/M/D）和透明导电氧化物，金属，透明导电氧化物（TCO/M/TCO）这两种类型的多层复合膜，分析了其设计原理和存在问题，并指出了控制金属层的厚度和界面扩散是制备高性能光电薄膜的重要方面，最后介绍了金属基复合膜应用，并对其研究进行了展望。     

金属基电热膜引燃能力研究

为研究金属基电热膜的引燃能力,以棉被、毛巾为覆盖物,对不同电热膜通电功率、不同覆盖物厚度和含水率条件下,覆盖物不同位置处的温度变化情况进行了实验研究,并通过建立相应的模型,计算得到了不同环境温度下,覆盖物与电热膜接触处的温度.研究结果可以为电热膜火灾的预防,以及电热膜火灾的原因调查提供一定的参考.     

轻质反射镜的制备方法及应用

总结了国内外轻质反射镜的研究现状,包括玻璃基轻质反射镜、SiC基轻质反射镜、金属基轻质反射镜及复合型轻质反射镜。详细分析和比较了轻质反射镜制备方法的优缺点。针对每种类型轻质反射镜制备方法的研究重点、发展方向和应用前景进行了展望。     

高纯纳米ZnSnO3气敏材料的制备及气敏性能

用草酸-氨水共沉淀法制备了ZnSnO3粉体,适当烧结后制备了一种对乙醇具有高灵敏度和高选择性的传感器。用X射线衍射仪和电镜对其成分和形貌进行分析。此外,用DSC-TG检测了草酸-氨水共沉淀法制得的前驱体反应过程,并与其它方法如：固-固反应、氨水反应制备出的粉体作了比较。结果发现：草酸-氨水共沉淀法制备的前驱体,在600℃,30h热处理后,可以获得高纯纳米ZnSnO3粉末。由这种粉末经700℃烧结2h制成的传感器对乙醇的灵敏度可达13．329。在有其它气体共存时,这种气敏传感器对乙醇具有良好的选择性。在30d的连续检测下,具有很好的稳定性。     

Anodic corrosion of heteroatom doped graphene oxide supports and its influence on the electrocatalytic oxygen evolution reaction

Transition metal-based electrocatalysts supported on carbon substrates face the challenges of anodic corrosion of carbon during oxygen evolution reaction at high oxidation potential. The role of electrophilic functional groups (carbonyl, pyridinic, thiol, etc.) incorporated in graphene oxide has been studied towards the anodic corrosion resistance. Heteroatom functionalized carbon supports possess modified electronic properties, surface oxygen content, and hydrophilicity, which are crucial in governing electrochemical corrosion in the alkaline oxidative environment. Evidently, electron-withdrawing groups in NGO support (pyridinic, cyano, nitro, etc) and its lower oxygen content impart maximum corrosion resistance and anodic stability in comparison to the other sulfur-doped and co-doped graphene oxide support. In this report, we establish the baseline evaluation of carbon-supported OER electrocatalysts by a systematic analysis of activity and substrate corrosion resistance. The result of this study establishes the role of surface composition of the doped supports while for designing a stable, corrosion-resistant OER electrocatalyst.     

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.     

P-Block Metal-Based Electrocatalysts for Nitrogen Reduction to Ammonia: A Minireview

Electrochemical nitrogen reduction reaction (NRR) to ammonia (NH₃) using renewable electricity provides a promising approach towards carbon neutral. What's more, it has been regarded as the most promising alternative to the traditional Haber-Bosch route in current context of developing sustainable technologies. The development of a class of highly efficient electrocatalysts with high selectivity and stability is the key to electrochemical NRR. Among them, P-block metal-based electrocatalysts have significant application potential in NRR for which possessing a strong interaction with the N 2p orbitals. Thus, it offers a good selectivity for NRR to NH₃. The density of state (DOS) near the Fermi level is concentrated for the P-block metal-based catalysts, indicating the ability of P-block metal as active sites for N₂ adsorption and activation by donating p electrons. In this work, we systematically review the recent progress of P-block metal-based electrocatalysts for electrochemical NRR. The effect of P-block metal-based electrocatalysts on the NRR activity, selectivity and stability are discussed. Specifically, the catalyst design, the nature of the active sites of electrocatalysts and some strategies for boosting NRR performance, the reaction mechanism, and the impact of operating conditions are unveiled. Finally, some challenges and outlooks using P-block metal-based electrocatalysts are proposed.