共查询到17条相似文献,搜索用时 78 毫秒
1.
2.
3.
4.
5.
6.
7.
8.
9.
成型是钇铝石榴石(YAG)透明陶瓷研制的关键环节,对透明陶瓷的致密化过程及其力学、热学和光学性能有重要影响。本工作围绕YAG透明陶瓷的基于数字光处理(DLP)技术的光固化3D打印成型,系统地开展了YAG陶瓷浆料的研制、陶瓷生坯的构筑及坯体脱脂和烧结工艺研究。采用流变仪分析了固含量对陶瓷浆料流变特性的影响,借助分析曝光参数对单层陶瓷膜特性的影响,确立了最佳的光固化工艺参数。结合TG–DTA分析,对陶瓷坯体脱脂制度进行了精准控制。采用真空高温烧结工艺制备得到高致密YAG透明陶瓷,讨论了固含量、烧结温度等工艺参数对YAG透明陶瓷微结构演变及光学质量的影响,基于DLP光固化成型技术成功制备出可见光透过率高达82.9%的高性能YAG透明陶瓷。 相似文献
10.
11.
氧化铝陶瓷是第一个实现透明化的先进陶瓷材料,拓展了先进陶瓷材料的研究和应用领域;并作为高强度气体放电灯的关键部件一电弧管而获得实际应用.近半个世纪以来,人们在提高透过率的理论研究和优化制备工艺方面取得了众多成果.本文论述了影响透明氧化铝陶瓷透光性的各种因素,并且从氧化铝粉体、烧结助剂的选择及作用和烧结工艺等三方面综述了近年来国内外关于氧化铝陶瓷研究的工作与进展,对氧化铝透明陶瓷的制备进行了较为系统的综述,最后展望了透明氧化铝陶瓷的发展趋势. 相似文献
12.
透明玻璃陶瓷具有热膨胀系数可调、强度高、化学稳定性好的优点,且兼具透光/发光的特性,是一种在光学信息、生物技术、激光技术、红外遥感及民用照明等领域有着广泛的应用前景的新型功能材料。本文简述了玻璃陶瓷的透光机制,对形核剂、过渡金属离子及稀土离子掺杂MgO-Al2O3-SiO2(MAS)系透明玻璃陶的析晶及透光/发光性能方面的研究进展进行了介绍,并简要分析了开发具备透光/发光性质的高结晶度MAS透明玻璃陶瓷材料存在的问题,最后展望了透明玻璃陶瓷的发展趋势与前景。 相似文献
13.
High-entropy ceramics have been widely explored and extensively studied since the first demonstration of the configuration entropy stabilized reversible transitions between multiple and single phases by Rost et al. in 2015. Most of the current research on high-entropy ceramics has focused on properties like thermal conductivity, thermoelectricity, structures, and others. Some recent studies have extended the high-entropy concept to the field of transparent ceramics. We reviewed these papers and proposed four potential ceramics groups for high-entropy transparent ceramics including fluoride ceramics, fluorite-deficient and/or ordered pyrochlore A2B2O7 ceramics, garnet ceramics, and sesquioxide ceramics. In this article, we review ceramic powder synthesis, the fabrication of transparent ceramics, high-entropy ceramics, and limited cases of high-entropy transparent ceramics for each category. High-entropy transparent ceramics with diverse compositions and structures will provide more possibilities for functional transparent ceramics in the future. 相似文献
14.
15.
综述了透明AlON陶瓷材料的制备工艺、透光性影响因素、主要应用及研究现状.指出透明AlON陶瓷已经成为各国材料学科领域和军事领域竞相研究的热点,透光性能好的AlON材料的研制和开发是制约我国在该领域发展的核心技术. 相似文献
16.
Haomin Wang Zhongwen Lu Zhiyong Huang Julie Cedelle Qingyuan Wang 《Ceramics International》2018,44(11):12472-12476
Traditional micro-sized and nano-sized YAG transparent ceramics were tested by nanoindentation at different peak loads. The micro-sized YAG transparent ceramics show a marked indentation size effect (ISE). However, for the nano-sized YAG transparent ceramics, the hardness was constant in the whole investigated range without any evidence of ISE. We show that the absence of indentation size effect for nano-sized YAG transparent ceramics can be accurately modeled using the plastic deformation mechanism of grain boundary sliding. 相似文献
17.
《Ceramics International》2023,49(12):20298-20303
The development of optoelectronic devices depends on the development of optoelectronic materials such as transparent ceramics. LiF transparent ceramics are photoelectronic ceramics with excellent photoelectric properties. Still, the traditional preparation of LiF transparent ceramics generally needs a high temperature or high-pressure environment, and the cost is high. This paper adopts a cold sintering process to prepare high-density LiF transparent ceramics at low temperatures to reduce the preparation conditions. The effects of different cold sintering temperatures on microstructure, density, hardness, visible and near-infrared transmittance, and electrical properties of transparent ceramics were studied. The results show that using LiOH solution as the solvent, the relative density of LiF ceramics can reach up to 99.64% under the sintering condition of 375 °C/470 MPa, and the Vickers hardness is 1.34 GPa. Vickers hardness is 1.34 GPa. The transmittance in the visible and near-infrared regions is 60.45% and 85.31%, respectively. The dielectric constant and dielectric loss of 13 GHz are 4.36 and 1.11 × 10−3, respectively. 相似文献