钛酸铝材料性能及合成工艺

钛酸铝陶瓷集低膨胀和高熔点为一体,但强度低且在一定温度范围内易分解。本文综述着重介绍了钛酸铝陶瓷的结构、性能和合成工艺,并提出了钛酸铝陶瓷的研究开发方向。     

铸铝用钛酸铝陶瓷升液管的研制

介绍了一步法生产钛酸铝陶瓷升液管的配方组成和生产工艺 ,重点讨论了添加剂和烧成温度对钛酸铝陶瓷升液管性能的影响。结果表明 :添加少量的添加剂和采用中—低温烧成技术 ,可以得性能优异的钛酸铝陶瓷升液管     

钛酸铝陶瓷及其改性研究

钛酸铝陶瓷作为一种重要的抗热震材料,集低热膨胀率和高熔点于一体。本文从钛酸铝陶瓷的结构、性能、常用的添加剂等几个方面,介绍了目前对钛酸铝改性方面的研究以及国内外的研究成果。     

钛酸铝陶瓷的性能及其应用

本对钛酸铝陶瓷的结构、热稳定性、微裂纹、低热膨胀性、机械强度及应用进行了综合阐述,并对工艺条件及添加剂对钛酸铝陶瓷性能的影响进行了讨论,给出了改善钛酸铝陶瓷性能的方法和途径,最后提出了钛酸铝陶瓷的研究开发方向。     

钛酸铝陶瓷及其研究现状

本文简述了钛酸铝陶瓷的制备及性能,论述了钛酸铝陶瓷的稳定性、微裂纹、低热膨胀性,讨论了工艺条件及外加剂对钛酸铝材料性能的影响,最后提出了改善钛酸铝陶瓷性能的技术途径。     

添加钾长石对镁掺杂钛酸铝陶瓷烧结及热膨胀行为和抗弯强度的影响

以镁掺杂钛酸铝固溶体粉体为原料,钾长石为烧结助剂制备了具有较高强度的低膨胀钛酸铝陶瓷.用场发射扫描电子显微镜观察了钛酸铝陶瓷断口形貌,并测量了陶瓷的烧结密度、抗弯强度和热膨胀曲线,研究了钾长石的引入量对钛酸铝陶瓷的烧结行为、微观结构、力学性能和热膨胀行为的影响.结果表明:钾长石的引入促进了镁掺杂钛酸铝陶瓷的烧结.引入8...     

钛酸铝材料综述

钛酸铝材料是集低膨胀和高熔点于一体,但强度低且在一定的温度范围内易分解.着重介绍了钛酸铝材料的结构、性能、合成工艺.在此基础上介绍了目前材料工作者对钛酸铝改性方面的研究以及国内外的研究成果,提出了钛酸铝陶瓷产业化的发展趋势.     

钛酸铝陶瓷及其应用

本文对钛酸铝陶瓷的结构、热稳定性、微裂纹、低热膨胀性、机械强度及应用进行了综合阐述，并对工艺条件及添加剂对钛酸铝陶瓷性能的影响进行了讨论，给出了改善钛酸铝陶瓷性能的方法和途径，最后提出了钛酸铝陶瓷的研究开发方向。     

铸铝用钛酸瓷升液管的研制

介绍了一步法生产钛酸铝陶瓷升液管的配方组成和生产工艺，重点讨论了添加剂和烧成温度对钛酸铝陶瓷升液管性能的影响。结果表明：添加少量的添加剂和采用中一低温烧成技术，可以得性能优异的钛酸铝陶瓷升液管。     

钛酸铝陶瓷升液管的研制

介绍了二步法制备钛酸铝陶瓷升液管的工艺。讨论了添加剂和工艺因素对钛酸铝陶瓷升液管性能的影响。研究结果表明，添加适量的添加荆和采用合理的制备工艺参数，可以制备出性能优良的钛酸铝陶瓷升液管，满足铝合金低压铸造机的使用要求。     

钇铝石榴石透明激光陶瓷的研究进展

透明钇铝石榴石(aluminum-yttrium garnet,YAG)陶瓷具有良好的化学稳定性和光学性能,是一种很有前途的单晶激光材料的替代物。同单晶相比,多晶YAG陶瓷具有许多优点,如：大尺寸材料易于制备,成本低适合大规模生产等。此外,因掺杂浓度高可得到较大的输出功率。对透明YAG激光陶瓷的光学特性以及制备工艺做了重点介绍,并对研究进展进行综合评述。最后,展望该领域的发展前景及今后的研究趋势。     

Further tailoring of material properties in non-equimolar aluminium titanate ceramic materials

The authors started their R&D activities related to aluminium titanate (AT) ceramics in the early 1990s by addressing the critical problems of aluminium titanate, such as thermodynamical instability and micro-cracking. After that, their focus has permanently been on improving, optimizing and tailoring the properties of the aluminium titanate ceramic materials produced by reaction-sintering of equimolar mixtures of alumina and titania powders. This paper presents their latest investigations on AT ceramics produced by reaction-sintering of non-equimolar mixtures of the two main components. The objective of these investigations has been to emphasize the effects of excesses of either alumina or titania on the internal stresses build up in these materials and the consequences these internal stresses could have on some material properties which are most important for the industrial applications of AT ceramics. The ways and the extent in which these internal stresses could be controlled/managed were investigated, with the ultimate goal of expanding the possibilities for further tailoring the thermo-mechanical properties of the aluminium titanate ceramics, so that they meet specific application requirements.     

钛酸铝陶瓷及其研究进展

钛酸铝陶瓷以其独特的低膨胀和耐高温性能而倍受青睐,但其较低的强度及一定温度范围内的不稳定性制约了该材料的实际应用.本文简要阐述了钛酸铝的微观结构特征,并从添加剂的选择、材料合成工艺、材料烧结工艺等方面,系统介绍了前人在该领域所做的研究工作.最后在总结前人工作的基础上,对钛酸铝陶瓷研究的发展方向作了合理的预测和展望.     

铝及其合金阳极化处理新进展

概述了国内外近几年铝及其合金的阳极化处理最新研究成果。从电解液组分、电流波形和电流密度等角度讨论了各种工艺条件和参数对氧化膜性质和结构的影响。概述了氧化膜在功能化方面的理论和应用研究,并简要介绍了铝及其合金微等离子体氧化技术和电化学沉积陶瓷技术的研究进展。     

Ceramic colorants

The history of ceramic colorants is reviewed, from around 1700 BC when iron earths and copper compounds were used by Egyptian potters, to the latest developments. An outline of the present day manufacture of ceramic colorants and modern process control procedures is presented. All the major types of ceramic colorants are described together with details of their development, properties and uses. Ideas for directions for future research in this area are discussed.     

铝及其合金材料表面处理研究进展

较系统地评述了近年来铝及其合金材料在表面处理方面取得的研究进展。阳极氧化方面主要介绍了硬质阳极氧化和复合阳极氧化等方面的研究成果;表面转化膜方面主要介绍了稀土转化膜以及无机非金属转化膜等在该方面取得的最新研究成果;文中还较详细地介绍了微弧氧化技术以及电化学陶瓷成膜技术在铝及其合金材料表面强化处理方面的研究进展。     

3D printing of ceramics: A review

Along with extensive research on the three-dimensional (3D) printing of polymers and metals, 3D printing of ceramics is now the latest trend to come under the spotlight. The ability to fabricate ceramic components of arbitrarily complex shapes has been extremely challenging without 3D printing. This review focuses on the latest advances in the 3D printing of ceramics and presents the historical origins and evolution of each related technique. The main technical aspects, including feedstock properties, process control, post-treatments and energy source–material interactions, are also discussed. The technical challenges and advice about how to address these are presented. Comparisons are made between the techniques to facilitate the selection of the best ones in practical use. In addition, representative applications of the 3D printing of various types of ceramics are surveyed. Future directions are pointed out on the advancement on materials and forming mechanism for the fabrication of high-performance ceramic components.     

化纤用陶瓷导丝器

列举了陶瓷导丝器在化纤生产中引起的常见问题及原因,分析了生产陶瓷导丝器的原料及其特点和适用场合,对导丝器常用的表面处理方法,特别是最新的纳米陶瓷涂层技术及特性进行了重点介绍。     

Photocatalytic ceramic tiles: Challenges and technological solutions

Titania-functionalized ceramic tiles are gaining space on the market of the self-cleaning photocatalytic building materials after a decade of industrial attempts and investigation on different technological issues. The present paper overviews the latest research on photocatalytic ceramic tiles in terms of process parameters, durability, cleanability and photoactivity, addressing challenges and solutions reported by academic and industrial sources. A special attention is paid to the superhydrophilicity and photocatalytic performance achievable on ceramic surfaces and their complex dependence on several factors (titania crystalline phase, deposition technique; firing temperature; thickness, roughness, specific surface area of the photoactive film; and so on). In particular, the methods used to deposit the titania layer, its degree of adhesion and effects on tile appearance (color, brightness, and roughness) are reviewed. Moreover, manufacturing a photocatalytic ceramic tile with a single firing step is still a challenge. Despite the international standards available on photocatalytic performance, the experimental parameters from one research to another may be quite different, therefore a performance comparison becomes virtually impossible. Nevertheless, among the available commercial products declared as photocatalytic ceramic tiles, just some of them revealed to be photoactive. From the data available, superhydrophilicity of tiles corresponded to contact angles with water in the 10–15° range. Specific photoactivity measured as methylene blue (MB) degradation resulted typically in the 2.8–3.4 mol/m²h range; photonic efficiency was between 0.025 and 0.030%; while MB index was in the 15–20 range. Finally, the relationship of dye degradation with the self-cleaning property is also a question that remains unanswered.     

自修复技术及自修复复合材料

具有自诊断、自修复功能的智能材料已成为新材料领域研究的重点之一。介绍了具有自修复能力的智能材料的概念、修复原理和模型,介绍了陶瓷混凝土基自修复复合材料、聚合物基自修复复合材料和金属基自修复复合材料等自修复功能,总结了自修复技术的组成要素,并对近年来该领域的最新进展进行了评述,最后对该技术应用前景和发展趋势作出预测。