课程文献中心 更多>>

关键词： 冶金企业   钢铁材料   化学检测  

摘要： 结合冶金企业的运行特点,对钢铁材料化学检测技术进行分析,认识到钢铁化学材料检测中存在的问题,旨在通过各项影响因素的分析,构建完善性的钢铁材料化学检测方案,提高冶金企业材料检测的整体效率,并为行业的稳步运行及持续发展提供参考。

关键词： 钢铁材料   化学分析   数据误差   影响因素  

摘要： 在国民经济快速发展下,钢铁产业成为重要经济产业,是工业化发展基础。我国属于发展中国家,钢铁需求量大。因此在今后发展中,应当全面做好钢铁产业,注重钢铁材料的化学探究与分析,以此促进我国钢铁产业的发展。此次研究主要是探讨分析钢铁材料化学分析中数据误差的影响因素,希望能够对相关人员起到参考性价值。

关键词： Supramolecular chemistry   Molecular materials   Chalcogen bonding   Crystal structure  

摘要： This review examines recent literature in search for evidence of the influence that chalcogen bonding has on the structure and properties of functional materials. Key examples from research on charge transfer salts, neutral heterocyclic free radicals, and paramagnetic coordination compounds are highlighted as intermolecular interactions are critical to properties such as conductivity and magnetic response. Other cases reviewed include the influence of chalcogen bonding on optical properties such as the electronic absorption spectra and the nonlinear optical response of non-centrosymmetric crystal structures. There is also evidence that this type of interaction between molecules translates into macroscopic mechanical properties such as the bulk modulus. (C) 2020 Elsevier B.V. All rights reserved.

关键词： 材料化学   课程思政   教学改革  

摘要： 从新时代高校立德育人的必然要求,通过对专业课程内容包含思想政治教育元素的探索与开发,发挥专业课程辅助思政专业进行思想政治教育的作用,进行材料化学“课程思政”教学改革探索。基于该课程教学大纲的宗旨,制定课程思政背景下专业课程的培养目标,通过实例枚举式、自由探索式、任务设计式等教学方法,在基础知识讲授过程中穿插进行思政教育元素的灌输,同时提升专业基础与思想政治素质,达到专业知识与思政教育的有机统一。

关键词： 封孔处理   化学镀Ni-Zn-P镀层   钕铁硼永磁材料   耐蚀性  

摘要： 在钕铁硼永磁材料表面化学镀Ni-Zn-P镀层,为了进一步提高镀层耐蚀性,镀后进行封孔处理。在封孔过程中,采用不同方式搅拌封孔液,表征了封孔处理前后镀层的表面形貌和孔隙率,并测量了封孔处理前后镀层的极化曲线和阻抗谱。结果表明:采用磁力和超声波搅拌封孔液,封孔处理后镀层与未封孔镀层相比表面的微孔数量明显减少,孔隙率降低,对腐蚀介质的敏感性和腐蚀倾向性减弱,耐蚀性明显提高。相比之下,在封孔过程中采用超声波搅拌封孔液能实现更好的封孔效果,封孔处理后镀层的孔隙率最低,约为1.04%,其耐蚀性更好。

关键词： 3D打印   材料化学   应用型人才   教学改革  

摘要： 随着3D打印技术的不断发展,其在各行业中具有革命性的应用潜力。文章从培养创新应用型人才的需求出发,对材料化学专业课程教学的现状进行了分析,用课程实例探讨了新兴3D打印技术在本专业课程教学中应用的可行性及其有益的教学效果。

关键词： charge transfer   density functional theory   open subsystem   quantum embedding  

摘要： This perspective considers two theories we recently proposed to perform quantum embedding calculations for chemical systems: domain-separated density functional theory (DS-DFT) and locally coupled open subsystems (LCOS). The development includes both the fundamentals of each theory as well as potential applications, some technical aspects, and related challenges. DS-DFT is suited to study intramolecular effects, where one can apply a high level of theory (based on DFT or wave function theory) to a region of interest inside a molecule or solid and lower level theory elsewhere, with smooth switching between the regions. LCOS, in contrast, is a fragment-based embedding, which offers computational advantages to study intermolecular behavior such as electron hopping, spin-environment interaction, and charge-transfer excitations. However, both theories can exchange roles when appropriate. In addition, these theories allow for control of computational scaling of their algorithms. We explore paths to determine the charge-transfer operator used in LCOS, and suggest an auxiliary energy minimization that can provide a practical estimate to this operator. We also briefly discuss how to implement density fitting techniques in domain separation, and how domain separation can be used for pure wave function-based embedding.

摘要： In this respect, the “Materials Chemistry” Section invites studies on the synthesis and characterization of either inorganic or organic (polymeric) materials, the investigation of structure–property relationships in metal, ceramic and polymer systems, as well as the design, preparation, and characterization of micro- and nano-composites (including hybrid organic-inorganic structures) and their applications in advanced sectors. [...]in terms of publication time, Molecules is among the fastest in the field, with an average of 32 days from submission to first publication. With the improvements in design and synthesis of new materials systems, characterization and analytical techniques, development of new technologies and novel micro- and nano-composite systems, the prospective contribution of materials chemistry research to the overall growth of materials science and technology seems limitless.

摘要： Through diversity of composition, sequence, and interfacial structure, hybrid materials greatly expand the palette of materials available to access novel functionality. The NSF Division of Materials Research recently supported a workshop (October 17-18, 2019) aiming to (1) identify fundamental questions and potential solutions common to multiple disciplines within the hybrid materials community;(2) initiate interfield collaborations between hybrid materials researchers;and (3) raise awareness in the wider community about experimental toolsets, simulation capabilities, and shared facilities that can accelerate this research. This article reports on the outcomes of the workshop as a basis for cross-community discussion. The interdisciplinary challenges and opportunities are presented, and followed with a discussion of current areas of progress in subdisciplines including hybrid synthesis, functional surfaces, and functional interfaces.

关键词： 课程思政   思政教育   全方位育人   知识素养   思想政治教育   思政课程   全程育人   教学全过程  

摘要： 全国高校思想政治工作会议强调了建设"全程育人、全方位育人、全员育人"的大思政教育格局的重要性,指出要把思想政治教育贯穿教学全过程,深入挖掘各门专业课的德育元素,完善思想政治教育的课程体系建设,推动"思政课程"向"课程思政"模式转变。材料化学作为高校化工类专业的主干课程,是化工学子今后的工作中研究创新必须要具备的知识素养,身处教育改革新时期,如何梳理提炼材料化学课程中的思政元素,或者说以怎样的方式将思政教育元素融入材料化学课程教学中,是一线高校化工教师和思政教育工作管理者亟待解决的问题。