共查询到18条相似文献,搜索用时 78 毫秒
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锂离子电池玻璃态电解质同晶体型电解质相比较具有导电性各向同性、锂离子电导率高等诸多优点, 开发在室温下具有较高的离子电导率及良好的化学、电化学稳定性的玻璃态电解质材料已经成为锂离子电池领域的重要研究方向之一。本文介绍了各种玻璃态电解质体系的导电特性及导电机理, 并重点分析与讨论混合网络形成体效应在一些典型玻璃态电解质体系中的微观作用机理。本文还总结了混合网络形成体效应在玻璃态电解质中发生的前提条件, 并指出深入研究玻璃态电解质的导电机理对开发出具有优异电化学性能的无机非晶固态电解质体系具有重要的指导意义。 相似文献
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在 Li_2O-Al_2O_3-SiO_2和 Li_2O-MgO-CaO-Al_2O_3-SiO_2系统中,对具有不同热膨胀系数(α)的烧结微晶玻璃基体作了研究。一些微晶玻璃基体能够同补强纤维结合得很好,适用于制备成碳纤维或 SiC纤维补强微晶玻璃复合材料。当微晶玻璃基体的α调节到比加入纤维的α稍低的范围内,复合材料的抗折强度和断裂韧性可达到满意的水平,F_b 为584MPa,K_(1c)为16.5MPa·m~(1/2)。实验结果作为纤维补强微晶玻璃复合材料性能设计原则,在上述系统中得到了验证。文中对微晶玻璃这类多相复合体热膨胀系数设计的理论依据作了讨论。 相似文献
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A/W生物微晶玻璃材料的研究进展 总被引:6,自引:0,他引:6
生物活性玻璃陶瓷材料由于能够与活体组织自发产生紧密的化学键合而成为骨修复材料中的重要分支,其中A/W生物微晶玻璃更是由于在保持良好生物活性的基础上,力学性能接近甚至超过自然骨而作为承重的生物活性材料应用于临床.系统介绍了A/W生物微晶玻璃的制备方法、生物活性和力学性能,并展望了A/W生物微晶玻璃今后的研究发展方向. 相似文献
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Yunhui Gong Kun Fu Shaomao Xu Jiaqi Dai Tanner R. Hamann Lei Zhang Gregory T. Hitz Zhezhen Fu Zhaohui Ma Dennis W. McOwen Xiaogang Han Liangbing Hu Eric D. Wachsman 《Materials Today》2018,21(6):594-601
Designing solid-state lithium metal batteries requires fast lithium-ion conductors, good electrochemical stability, and scalable processing approaches to device integration. In this work, we demonstrate a unique design for a flexible lithium-ion conducting ceramic textile with the above features for use in solid-state batteries. The ceramic textile was based on the garnet-type conductor Li7La3Zr2O12 and exhibited a range of desirable chemical and structural properties, including: lithium-ion conducting cubic structure, low density, multi-scale porosity, high surface area/volume ratio, and good flexibility. The solid garnet textile enabled reinforcement of a solid polymer electrolyte to achieve high lithium-ion conductivity and stable long-term Li cycling over 500?h without failure. The textile also provided an electrolyte framework when designing a 3D electrode to realize ultrahigh cathode loading (10.8?g/cm2 sulfur) for high-performance Li-metal batteries. 相似文献
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Polozhentseva Yu. A. Karushev M. P. Rumyantsev A. M. Chepurnaya I. A. Timonov A. M. 《Technical Physics Letters》2020,46(2):196-199
Technical Physics Letters - A lithium-ion supercapacitor with the positive electrode based on a high-porosity carbon material modified by a conducting polymeric complex of nickel with a Schiff... 相似文献
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介绍了国内外以冶金矿渣、尾矿渣及粉煤灰、城市垃圾焚烧飞灰为主要原料的废渣微晶玻璃的研究概况,分别对其组成、结构与性能、种类与制备等方面做了分析。重点综述了彩色废渣微晶玻璃的研究现状,在废渣微晶玻璃的基础上,调节玻璃组分,以硒粉、氧化铬、氧化锰等作为着色剂,通过采用一次着色或二次着色工艺,可制备出色彩丰富的废渣微晶玻璃,市场潜力巨大。最后展望了工业及生活废渣制备微晶玻璃的未来发展。 相似文献
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综述了利用冶金炉渣制备微晶玻璃的方法;介绍了更为简便的粉末成型直接烧结法的最新进展;综述了基础玻璃的组成、热处理制度对炉渣微晶玻璃性能的影响;展望了炉渣微晶玻璃的发展前景。 相似文献
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以白云鄂博某尾矿为主要原料、以Cr2O3为晶核剂制备尾矿微晶玻璃,使用DSC、XRD、SEM、TEM以及Raman光谱等手段对其表征并测试其析晶特性、抗折强度、维氏硬度和耐酸性,研究了尾矿含量对其析晶特性和性能的影响。结果表明,微晶玻璃的主晶相由辉石相和钙铝黄长石相构成,其中晶核剂Cr2O3因形成尖晶石晶核诱导辉石相析出。随着尾矿含量的提高微晶玻璃的力学和耐腐蚀特性呈现降低的趋势。其原因是,尾矿含量的提高使CaO的含量过高,在晶体的生长过程中滑动和迁移受阻进而在微晶玻璃中产生空洞和缺陷。同时,微晶玻璃中钙铝黄长石相/辉石相比例增大也不利于其性能的提高。白云鄂博尾矿中共生的稀土元素在晶界处形成铈钙硅石第二相,可减小晶界面积并降低晶界总能量,有助于提高微晶玻璃的力学和耐腐蚀性能。 相似文献
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Glass-ceramics: Their production from wastes—A Review 总被引:5,自引:0,他引:5
Glass-ceramics are polycrystalline materials of fine microstructure that are produced by the controlled crystallisation (devitrification)
of a glass. Numerous silicate based wastes, such as coal combustion ash, slag from steel production, fly ash and filter dusts
from waste incinerators, mud from metal hydrometallurgy, different types of sludge as well as glass cullet or mixtures of
them have been considered for the production of glass-ceramics. Developments of glass-ceramics from waste using different
processing methods are described comprehensively in this review, covering R&D work carried out worldwide in the last 40 years.
Properties and applications of the different glass-ceramics produced are discussed. The review reveals that considerable knowledge
and expertise has been accumulated on the process of transformation of silicate waste into useful glass-ceramic products.
These glass-ceramics are attractive as building materials for usage as construction and architectural components or for other
specialised technical applications requiring a combination of suitable thermo-mechanical properties. Previous attempts to
commercialise glass-ceramics from waste and to scale-up production for industrial exploitation are also discussed. 相似文献