2-乙基己酸的制备

研究了 2乙基己酸的制备 ,该反应是 2乙基己醇与氢氧化钠在催化剂存在下进行氧化、脱氢 ,生成产物2乙基己酸。通过实验找到了一种新型、高效、廉价的催化剂 ,以及最佳反应条件。通过对 2乙基己酸的分析测试 ,产品完全符合质量标准。     

Mechanical behavior of 30–50 nm thick aluminum films under uniaxial tension

We present uniaxial tensile test results for 30–50 nm thick freestanding aluminum films. Young’s modulus and ductility were found to decrease monotonically with grain size. Reverse Hall–Petch behavior was observed with no appreciable room temperature creep. Non-linear elasticity with small irreversible deformation was observed for 50 nm thick specimens.     

功率电子器件用AlN陶瓷基板的研制

阐述了AlN陶瓷的烧结原理 ,分析了烧结工艺参数对大面积AlN基板性能的影响 ,成功研制出了高热导率(190W /m·K)、大面积 (14 0mm× 90mm)、翘曲度为 2 0 μm/5 0mm的AlN陶瓷基板。     

硼酸铝晶须增强环氧树脂和双马来酰亚胺树脂体系的研究

本文以硼酸铝晶须为增强剂，以4，5-环氧环己烷-1，2-二甲酸二缩水甘油酯(TDE-85)，甲基纳狄克酸酐(MNA)、N，N’-二胺基二苯甲烷型双马来酰亚胺(BMI)/O，O′-二烯丙基双酚A(BA)体系分别作为基体制备晶须增强复合材料。研究了晶须对树脂的尺寸、表面处理方法、含量对树脂体系力学性能和热性能的影响；通过扫描电子显微镜(SEM)分析了浇注体的弯曲、冲击断口，研究晶须的增强机理。     

Influence of inhibitor addition on the corrosion protection performance of sol–gel coatings on AA2024

Sol–gel films are actively investigated during the last decade as possible candidates for environmentally friendly pre-treatments. However, the important drawback in this case is the lack of active corrosion protection and self-healing ability.     

Transmittance and cathodoluminescence of AlN ceramics sintered with Ca3Al2O6 as sintering additive

Aluminum nitride ceramics were prepared by sintering with 0–4.8 mass% of Ca₃Al₂O₆ (C₃A) as a sintering additive. The transmittance in the range of 260–550 nm increased with increasing amount of C₃A. The cathodoluminescence intensity attributed to oxygen-induced defects decreased with increasing amount of C₃A. From the results, the increase of the transmittance in the range of 260–550 nm was considered to be related to the decrease of the oxygen-induced defect density.     

Catalytic oxidation of sulfide ions over nickel hydroxides

The catalytic sulfide ion oxidation by oxygen to elemental sulfur over β-Ni(OH)₂ and LiNiO₂ has been studied. As a result of experimental investigation performed, a reaction mechanism is suggested which involves heterogeneous and homogeneous processes. Dioxygen activation in the heterogeneous process proceeds via a redox Ni²⁺ ↔ Ni³⁺ transition and participation of OH⁻ groups. The active HO⁻₂ species thus formed carries on the reaction in homogeneous phase. Nickel hydroxides are promising catalysts for practical application.     

浅议铝箔项目的给排水设计

通过铝箔项目的工程实例,详细介绍了铝箔项目给排水专业设计的主要构成,并总结了几点设计体会,可供有关专业设计人员借鉴、参考。     

升深2-17井络合铝聚合物充气钻井液现场试验

为加快徐加固子深层天然气的勘探开发步伐，缩短深层气井的建井周期，在升深2-17井进行了充气钻井试验。介绍了络合铝聚合物充气钻井液技术的现场应用概况及效果以及井漏的发生与处理过程、钻井液起泡的解决措施。在现场试验过程中，络合铝聚合物钻井液性能稳定，具有较强的抑制性和较好的流变性能，流性指数控制在0．7左右，具有良好的携屑和稳定井壁能力，而且粘度较低，基本上控制在33～52s之间，满足了现场充气和脱气的需要；该钻井液抗温可达180℃，润滑性能较好，在钻井过程中无粘卡显示，在深井欠平衡井眼稳定方面取得了较好的效果；在不同的气液比条件下，可以在0．83～1．08g／cm。之间实现对当量密度的调节;与常规钻井工艺相比，充气钻井可以使机械钻速提高30％～50％；在钻进过程中实现了充气和点火同时进行，达到了欠平衡钻井工艺技术的要求，为进一步开展气体钻井打下了良好的基础。