Rare Metals, EarlyView.ABSTRACT Rare earth elements (REEs) play an irreplaceable role in modern technology and industry. However, due to the highly similar physicochemical properties among REEs, their separation remains a significant challenge. Additionally, REEs often exist in low‐concentration solutions, making efficient REE recovery an urgent task.
Miao‐Miao Huang +6 more
wiley +1 more source
Rare Metals, EarlyView.ABSTRACT The development of high‐performance electromagnetic protection materials integrating broadband absorption and effective shielding capabilities is hindered by challenges in simultaneously optimizing multiple electromagnetic properties through conventional material designs.
Changlong Du +9 more
wiley +1 more source
Research on the Preparation and Properties of Iron-based Composites Used as Neutron Absorbing in Gray Control Rod [PDF]
, 2016 中国已从美国西屋公司引进、吸收和消化AP1000核电技术。为了形成自主知识产权的关键核电技术，本文对堆芯关键部件灰控制棒用中子吸收体材料进行了相关研究。基于前期对多种元素的核特性及燃耗分析获得了几种符合灰控制棒性能要求的候选元素，如Tm、Tb和Dy。本文采用粉末冶金方法(高能球磨、冷等静压与烧结)制备出了两种堆芯灰控制棒用中子吸收材料Fe-Tm2O3和Fe-TbFeO3-DyFeO3芯块。采用材料分析方法对球磨粉末、烧结块体进行了微观组织与微观化学分析与表征 ...
刘腾蛟
core
Anisotropy and energy evolution mechanism of rock mass under true triaxial loading-unloading [PDF]
, 2023 In the process of underground excavation, the surrounding rock is in a very complex stress environment, especially under the influence of its anisotropy, the occurrence of dynamic disaster is hidden.
Chongyan LIU +5 more
core +1 more source
Studies on Preparation and Properties of Lu3Al5O12: Ce3+, Er3+ Green Phosphors for White Light Emitting Diode [PDF]
, 2015 随着科学的进步，白光发光二极管（lightemittingdiode，简称LED）因其环保、节能、体积小、寿命长等优点被公认为第4代固体光源，广泛应用于屏幕显示、电子产品背光源和普通照明等领域。荧光粉转换法制备白光LED是一种成本低、综合性能好、易于实现的方法。目前，已商业化的白光LED是由蓝光氮化镓（GaN:In）芯片组合YAG:Ce3+黄色荧光粉所实现的，因其缺少红色成分致使显色指数不高。因此考虑用蓝光芯片配合红色和绿色荧光粉来得到需要的白光。为提高白光LED的显色指数和发光效率 ...
余艳平
core
Experimental study on dynamic response and residual compressive strength of composite sandwich panel with PVC foam core under single-point low-velocity impact [PDF]
ObjectivesIn this paper, an orthogonal braided glass fiber composite sandwich panel with a PVC foam core and dimensions of 150 mm×100 mm×26 mm is selected as the research object in order to study the impact mechanical properties of composite sandwich ...
Chongyi CHEN +6 more
core +1 more source
Structure Genetic Mechanism and Provenance Analysis of Badain Jaran Desert, Northwest China [PDF]
, 2015 由于长期构造地质作用，我国西北部地区变得气候持续干旱，生态极为脆弱。生态系统的不断恶化，加上人为因素的影响，塔克拉玛干、腾格里、毛乌素、巴丹吉林沙漠等沙漠化形势越来越严峻，尤其每年冬春季节将频发沙尘暴活动，严重影响了人民群众的正常生活。而巴丹吉林沙漠正好地处我国东、西部沙区之间的过渡敏感地带，以发育有复杂高大沙山，分布着星罗棋布的湖泊而闻名于世，具有较高的学术研究价值，一直以来倍受中外学者的高度重视和关注。 迄今为止，学术研究主要关注点在沙漠物源、成因机理、侵蚀过程和治理方法等方面 ...
韩超
core
Dianci bileiqi, 2018 金属氧化物避雷器作为过电压保护设备,对电力系统绝缘配合起着关键作用。金属氧化物避雷器的能量吸收能力是避雷器的重要特征性能,决定着其保护特性和自身的运行安全,已引起使用部门和制造者的普遍关注。避雷器的能量吸收能力主要取决于电阻片的能量吸收能力,在运行和试验过程中,电阻片会有哪些破坏形式,哪些因素会影响到电阻片的能量吸收能力,本文对此进行初步试验探讨。试验结果显示,电阻片的主要破坏形式有贯穿、开裂、闪络,影响电阻片能量吸收能力的主要因素有电阻片的起始温度、热容量、能量注入的形式。
艾三 +5 more
doaj
Studies on Preparation and Photoluminescence Properties of Mn4+-doped Fluoride Red Phosphors for White Light Emitting Diodes [PDF]
, 2016 自1990s以来，白光发光二极管(whitelightemittingdiode，WLED)的快速发展得益于高亮度GaN基蓝光LED的成功研制。目前，WLED以其高效节能、绿色环保、安全耐用等优点，当仁不让地成为了打造节约型社会环境下照明行业的新宠，被誉为继白炽灯、荧光灯和高强度放电灯之后的第四代照明光源。但当前的WLED不是因缺乏红光成分而导致显色指数偏低，就是因红粉效率较低而导致发光效率偏低。因此，亟需具有高效窄带的红色荧光粉以弥补当前WLED的不足。 本文选择复合氟化物K2MF6(M=Si，Ge ...
陈文威
core
Impact resistance performance of rockbolt system with(out) rubber cushion energy absorbing and buffering components [PDF]
The practice of impact resistance support in dangerous roadways has shown that energy absorbing and buffering components can improve the impact resistance performance of rockbolt support systems. A rubber cushion layer was used as an energy absorbing and
Fuqiang GAO +8 more
core +1 more source