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| 1 | Recent advances in solid-state LED phosphors with thermally stable luminescence显示文摘Phosphor-converted white light-emitting diode(LED) lighting has gained tremendous achievements since the invention of the InGaN blue LED by Nakamura et al., who won the Nobel Physics Prize in 2014.By far, a significant challenge comes from the thermal quenching(TQ) behavior of the present LED phosphors during the high-power LED operation or the updated laser lighting. But systematic research or review on the luminescence quenching character and/or how to realize thermally stable luminescence are lacking. Since TQ is an inherent property of phosphors, it can be diminished by different approaches.This review proceeds from the mechanism of TQ, summarizes previous researches on improving the thermal stability of LED phosphors and also discusses future research opportunities in this field. The developments of the phosphors with properties of high luminance and thermal stability, as well as the improved strategies involved,will benefit the basic researches and applications in high power lighting or high-luminance laser lighting. | Jianwei Qiao Jing Zhao Quanlin Liu Zhiguo Xia | 2019 | Journal of Rare Earths2019，37，6： | 34 |
| 2 | Application of P507 and isooctanol extraction system in recovery of scandium from simulated red mud leach solution显示文摘The current recovery technique of Sc was complicated and the chemical consumption was high,This was due to the low content of Sc in resources and the difficulty of stripping.In this research,the isooctanol was added into the 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester(P507)extraction system to reduce the extraction and improve the stripping of Sc.The maximum stripping ratio of Sc from loaded organic phase by sulfuric acid can increase from 10%(without isooctanol)to 99%(with 15 vol%isooctanol).In the extraction test of the simulated red mud leaching liquor,the separation factors between Sc and Zr,Sc and Ti are 36 and 350,separately.At the same time,other metals are almost not extracted.The high selectivity and stripping of Sc suggest that the P507 with isooctanol extraction system can be applied in the practical Sc recovery process. | Chuanying Liu Li Chen Ji Chen Dan Zou Yuefeng Deng Deqian Li | 2019 | Journal of Rare Earths2019，37，9： | 22 |
| 3 | Development course of separating rare earths with acid phosphorus extractants: A critical review显示文摘This paper reviews the development course of separating rare earths with acid phosphorus extractants,including extraction chemistry(thermodynamics and kinetics), separation process and industrial application, the loss/degradation of extractants, etc. | Deqian Li | 2019 | Journal of Rare Earths2019，37，5： | 20 |
| 4 | CuZnAl Shape Memory Alloy Refined with Composite Rare Earths La+Ce显示文摘The effects of composite rare earths La+Ce on properties of CuZnAl shape memory alloys were studied bymetallograph examination, tensile and bending tests, electric resistivity measurements, EDS and SEM. The test resultsshow that the grain size of CuZnAl shape memory alloys could be diminished effectively and the mechanical propertiesimproved obviously by the addition of composite rare earths La+Ce (La: Ce=1: 1). Meanwhile, the excellent shapememory properties remained unchanged. The results of microanalyses indicate that the composite rare earths were segregated at grain boundaries and impeded the grain growth, leading to the improvement of the mechanical properties ofCuZnAl alloys. If the amount of composite rare earths La+Ce was greater than 0. 10%, the shape memorial propertiesbecame poor. | 司乃潮 | 1999 | Journal of Rare Earths1999，17，4： | 16 |
| 5 | Synthesis,Characterization and Antibacterial Properties of Rare Earth (Ce^(3+) ,Pr^(3+) ,Nd^(3+) ,Sm^(3+) ,Er^(3+) ) Complexes with L-Aspartic Acid and o-Phenanthroline显示文摘Five novel ternary complexes of rare earth ions with L-Aspartic acid (Asp) and o-phenanthroline (Phen) were synthesized in ethanol aqueous solution. Their compositions were characterized by elemental analysis, molar conductance, FT-IR, Raman, UV-VIS and TG-DTA. The compositions of the complexes were confirmed to be: RE(Asp)3PhenCl3·3H2O (RE: Ce3+, Pr3+, Nd3+, Sm3+, Er3+). The antibacterial activity test shows that all these complexes exhibit excellent antibacterial ability against Escherichia coli, Staphylococcus aureus and Candida albicans. The antimicrobial spectrum of the complexes are broad. | 郁慧 何其庄 杨静 郑文捷 | 2006 | Journal of Rare Earths2006，24，z2： | 15 |
| 6 | Study on the adsorption of lanthanum(Ⅲ) from aqueous solution by bamboo charcoal显示文摘The adsorption behaviors of La(Ⅲ) ion on bamboo charcoal were investigated with various chemical methods and IR spectrometry. Parameters studied include the effects of pH,average particle size,initial ion concentration,contact time and temperature by batch method. The results showed that bamboo charcoal could remove La(Ⅲ) ions effectively from aqueous solution. The loading of La(Ⅲ) ions was strongly dependent on pH of the medium and the optimal adsorption condition was in HNO3-TEA medium with pH value of 7.20. In the batch system,the modified bamboo charcoal exhibited the highest La(Ⅲ) ion uptake as 120 mg/g at 298 K,at an initial pH value of 7.20. The adsorption kinetics were tested with Lagergren-first-order model and pseudo-second-order model. The adsorption data were conformed to the Langmuir and Freundlich isotherms,and the correlation coefficients had been evaluated. Thermodynamic parameters such as free energy(ΔG) ,which were all negative,indicated that the adsorption of La(Ⅲ) ion onto bamboo charcoal was spontaneous and the positive value of enthalpy(ΔH) showed that the adsorption was endothermic in nature. Thomas model was applied to experimental column data to determine the characteristic parameters of column useful for process design. The characterization of both before and after adsorption of La(Ⅲ) ion on bamboo charcoal was undertaken using IR spectroscopic technique. The results revealed that bamboo charcoal was a good choice as a biosorbent for the recovery of lanthanum from aqueous solution. | 陈青 | 2010 | Journal of Rare Earths2010，28，S1： | 15 |
| 7 | Synthesis of Ce:YAG Phosphor via Homogeneous Precipitation under Microwave Irradiation显示文摘Ultra-fine Ce:YAG phosphors were prepared by homogeneous precipitation under microwave irradiation method. The formation of Ce:YAG was investigated by means of XRD and DTA/TG. The purified YAG crystallized phase was obtained at a lower temperature (1100 ℃). Basically spherical Ce:YAG powders were indicated from TEM images, and the size of the particles is about 80 nm. Two peaks of 436 and 473 nm can be seen from the excitation spectrum in the range of 402~510 nm. A broad emission band located at 480~630 nm shows the phosphors prepared by this method have good emission properties. | 王勇 袁鹏 徐红燕 王介强 | 2006 | Journal of Rare Earths2006，24，z2： | 15 |
| 8 | Synthesis and characterization of Sb-doped SnO_2-(CeO_2-TiO_2) composite thin films deposited on glass substrates for antistatic electricity and UV-shielding显示文摘Sb-doped SnO2(ATO)-(CeO2-TiO2) thin Films were deposited on glass substrates using the mixed solution including CeO2-TiO2 precursor and ATO particles by sol-gel dip coating process.ATO particles were prepared using low-temperature hydrothermal process.The mixed molar ratio of ATO to(CeO2-TiO2) vs the properties of CeO2-TiO2 thin film was investigated.The optical properties of the films were characterized by UV-visible transmission and infrared reflection spectra,the sheet resistance of ATO particles and films were measured by rubber sheeter(MYI-50) and four-point probe(HisuperGroup Inc,SDY-5),the surface morphology and structure of the films were analyzed using 3D Digitale Mikroskop and X-ray diffraction(XRD),respectively.The results showed that the ATO precursor solution lost weight completely at about 500 oC,and the ATO particles was obtained,which indicated the same rutile lattice structure as SnO2.The glass substrates coated with ATO-(CeO2-TiO2) thin films showed better properties in antistatic electricity(104-106 Ω/),shielding UV(almost 100%),visible light transmission(70%) and infrared reflection(>30%). | WU Shuo1,ZHAO Qingnan1,MIAO Dengkui1,DONG Yuhong2(1.Key Laboratory for Silicate Materials Science and Engineering of Ministry of Education,Wuhan University of Technology,Wuhan 430070,China 2.Jiangsu Xiuqiang Glasswork CO.,Ltd.,Suqian 223800,China) | 2010 | Journal of Rare Earths2010，28，S1： | 14 |
| 9 | PREFACE显示文摘China,as a major country in natural resources, productions and applications of rare earths, has witnessed during the past two decades an astounding development of rare earths in both fundamental and industrial aspects. | Guangxian | 2010 | Journal of Rare Earths2010，28，6： | 14 |
| 10 | Microstructure and mechanical properties of Mg-Gd-Y-Sm-Al alloy and analysis of grain refinement and strengthening mechanism显示文摘The effects of Sm on the microstructure and mechanical properties of Mg-11 Gd-2 Y-0.6 Al alloy were investigated by X-ray diffraction,optical microscopy,scanning electron microscopy,energy dispersive spectrometry and high resolution transmission electron microscopy.Based on the theory of edge—edge matching and electronegativity theory,the mechanism of grain refinement is discussed.The strengthening mechanism is expounded conveniently from fine grain strengthening,coherent strengthening,precipitation strengthening and grain boundary strengthening.The results show that the micro structure of Mg-11 Gd-2 Y-0.6 Al alloy is mainly composed of a-Mg matrix,Mg5 Gd and Mg24Y5 phases.The addition of Sm forms Mg41Sm5 phase in the alloy and refines the alloy.The addition of Sm significantly improves the mechanical properties of the alloy at room and high temperatures.When the addition of Sm is 3 wt%,the tensile strengths of the alloy at room temperature and high temperature(200℃)reach the maximum value 292 and 321 MPa,respectively.The fracture mode of the alloy at different temperatures is mainly brittle fracture and intercrystalline fracture. | Xiaoya Chen Quanan Li Jun Chen Limin Zhu | 2019 | Journal of Rare Earths2019，37，12： | 12 |
| 11 | Development and Prospect of Rare Earth Functional Biomaterials for Agriculture in China显示文摘The development and prospect of rare earth functional biomaterials (REFB) was discussed. From 1979 to 1985, the simple REFB (salts) has been developed, and the fundamental research including forms, effects, toxicity, conversion in soil, and analysis methods had been finished. Then, the RE feed additive materials had been developed, and the fundamental research had also been finished. In 1990s, new REFB including RE phosphate fertilizer additive, RE conversional agricultural film additive, RE water-retraining reagent and RE seed coating reagent had been developed out rapidly. They were extended to 1.36 million hectares and big benefit had been got during the last three years. Recently, it was found that RE has some function of antagonizing heavy metals and degradating organophosphors pesticide, so the REFB will be studied as a focus once more, and will become one of the important methods of guaranteeing food security in the future. | 王甲辰 刘向生 杨军 张赫 刘营 樊玉斌 伍艳平 韩学伟 | 2006 | Journal of Rare Earths2006，24，z2： | 12 |
| 12 | Corrosion behavior of rare earth cerium based conversion coating on aluminum alloy显示文摘The present paper focused on the use of the salt of rare earth cerium as corrosion inhibitor of aluminum by using cathodic electrolytic passivation method.The corrosion resistance and the microphology of the cerium passivation film were studied by the methods of electrochemical method,scanning electron microscopy(SEM),and energy dispersive spectroscopic analysis.From the results,it was shown that good corrosion resistance of cerium-based passive coating was obtained when the compositions were as follows:CeCl3·7H2O,0.05 mol/L;H2O2,30 ml/L;current density,1.1 mA/cm2;temperature,40 oC;time,9 min.SEM and EDS revealed that the cerium conversion coatings formed on the surface of aluminum alloy were related to cerium hydroxide/hydrated oxide depositions. | 赵丹 孙杰 张丽丽 谭勇 李季 | 2010 | Journal of Rare Earths2010，28，S1： | 12 |
| 13 | Effect of Rare Earths on Diffusion Coefficient and Transfer Coefficient of Carbon during Carburizing显示文摘The diffusion coefficient of carbon in surface layer of steel 20 rare earth carburized at 880 ℃ and 900 ℃ for 8 h was calculated by substituting the measured layer depths into the diffusion equation. The mathematical model of the transfer coefficient of carbon was deduced based on the kinetics of weight gain during gas carburizing. The calculated results show that the main reason why the gas carburizing process is accelerated is due to the obvious increase in the diffusion coefficient and transfer coefficient of carbon resulted from the addition of RE. | 阎牧夫 刘志儒 | 2001 | Journal of Rare Earths2001，19，2： | 12 |
| 14 | Rare Earth Effects on Adhesion of Cr_2O_3 Oxide Scale Formed on Surface of Co-40Cr Alloy显示文摘Isothermal and cyclic oxidation behaviors of Co 40Cr alloy at 1000 ℃ in air were studied. Scanning electron microscopy (SEM) was used to examine the oxide scale formed on the surface of the alloy. By comparing the oxidation behaviors of Co 40Cr alloy and its 3×10 16 and 3×10 17 Y +/cm 2 implanted specimens, it was found that the resistant to oxidation property of Co 40Cr was greatly improved due to the implantation of yttrium. Acoustic emission was used to study the distribution of defects at the interface between the scale and alloy. Raman spectrum was also used to study the stress status in chromic scale formed on the surface of Co 40Cr with and without yttrium. The main reason for the improvement of resistant to oxidation property of Y doped Co 40Cr probably is that yttrium can segregate to Cr 2O 3 grain boundaries and change the scale′s growing mechanism and mechanical property. Most importantly, Y implantation decreases the size and number of interfacial defects and the residual stress in the scale, and remarkably enhances the adhesion of chromia scale with Co 40Cr substrate. | 靳惠明 张林楠 李美栓 李铁藩 | 2001 | Journal of Rare Earths2001，19，1： | 12 |
| 15 | Photoluminescence enhancement of YAG:Ce^(3+) phosphor prepared by co-precipitation-rheological phase method显示文摘YAG:Ce3+ phosphor was prepared by a novel co-precipitation-rheological phase method.The resulting YAG:Ce3+ phosphor was characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM) and photoluminescent emission spectra.By using acetic acid as solvent,YAG:Ce3+ powder with small particle size(≤2 μm) was obtained at a relatively lower sintering temperature of 1400 oC.With the content of acetic acid increasing,small particles dissolved and disappeared,but larger particles grew up and changed its shape from spherical to partially rectangular.Meanwhile,the emission intensity of the sample prepared by co-precipitation-rheological phase method was about 43% higher than that of the sample prepared by co-precipitation method.It was assumed that the significant improvement of luminescence was mainly because the rheological phase presented a better diffusion environment,and therefore,a better homogeneity of activators of Ce3+. | 叶信宇 龙震 杨幼明 聂华平 郭艳伟 蔡裕发 | 2012 | Journal of Rare Earths2012，30，1： | 11 |
| 16 | Microstructure and mechanical properties of A356 alloy with yttrium addition processed by hot extrusion显示文摘The effects of the rare earth element yttrium(Y) and hot extrusion on the microstructure and mechanical properties of A356 alloy were investigated by mechanical properties testing and microstructure observation. The results indicate that the addition of Y improves the microstructure of the as-cast alloy. The distribution of primary α-Al is uniform and orderly. The long needle-like eutectic Si phases and β-Fe phases turn to strips and short rods. When the content of Y increases to 0.2 wt%, the mean diameter of aAl(40.3 μm) and the aspect ratio of the eutectic Si phase(2.3) reach the minimum values, which are68.9% and 86.1% lower, respectively, than that of the alloy without Y addition. Under extrusion stress, the shape of the eutectic Si phase is changed from long rod-like to near grain-like after solution treatment.The size of the eutectic Si phase is significantly reduced. The needle-like β-Fe phases are squeezed and broken. The mechanical properties of the as-extruded alloy are significantly improved compared to the as-cast alloy. When the rare earth content is 0.2 wt%, the ultimate tensile strength, hardness and elongation of the alloy reach the maximum values, which are 328.2 MPa, 110.4 HV and 21.3%, respectively, and increase by 42.01%, 37.71% and 481.91%, respectively, in comparison to the as-cast alloy without Y addition. | Zhifan Wei Yushun Lei Hong Yan Xihao Xu Jiajia He | 2019 | Journal of Rare Earths2019，37，6： | 11 |
| 17 | Cone-shaped cylindrical Ce_(0.9)Gd_(0.1)O_(1.95) electrolyte prepared by slip casting and its application to solid oxide fuel cells显示文摘A cone-shaped gadolinium doped ceria(Ce0.9Gd0.1O1.95,GDC) electrolyte cylinder with a thin wall was fabricated using slip cast-ing technique.The diameter of the larger open end of the cone-shaped cylinder was 0.85 cm,the length was 1.0 cm,and the thickness of the wall was 0.026 cm after sintering.Both the electrolyte and electrode powders were fabricated by using a glycine-nitrate process.A single solid oxide fuel cell(SOFC) was prepared with the cone-shaped electrolyte,NiO-GDC(70:30 wt.%) anode and Sm0.5Sr0.5CoO3(SSC) cathode.Its electrochemical performance(I-V curve) and electrochemical impedance spectroscopy(EIS) were studied with humidified hydrogen as the fuel and air as the oxidant.The maximum output power density was about 300 ?mW/cm2 at 700 oC.The EIS results showed that the dominant loss of the SOFC was from the ohmic resistance of the electrolyte. | 隋静 董立峰 刘江 | 2012 | Journal of Rare Earths2012，30，1： | 10 |
| 18 | Effect of preparation method on physicochemical properties and catalytic performances of LaCoO3 perovskite for CO oxidation显示文摘Perovskite oxides LaCoO3 prepared by templating,co-precipitation and sol-gel method with different complexants were systematically characterized and its catalytic performances for CO oxidation were investigated.The samples were characterized by X-ray diffraction,thermogravimetry analysis and differential scanning calorimetry,N2 physisorption,transmission electron microscopy,temperature program reduction of hydrogen,temperature program desorption of oxygen and X-ray photoelectron spectroscopy measurement,results of which show that the properties of LaCoO3,such as surface morphology,surface area,surface compositions,redox capability,oxygen vacancy,as well as the calcination temperature and formation mechanism,depend intimately on the preparation method.Catalytic tests indicate that the sample prepared by carbon templating method shows the best activity for CO oxidation,with full CO conversion obtained at 135℃.In particular,the catalyst can be activated and significant increase of activity can be obtained with the increase of reaction time.The cyclic and longterm stability of catalysts were discussed and compared. | Shan Wang Xuelian Xu Junjiang Zhu Duihai Tang Zhen Zhao | 2019 | Journal of Rare Earths2019，37，9： | 10 |
| 19 | Electrodeposition of magnesium-yttrium alloys by molten salt electrolysis显示文摘Electrodeposition of magnesium-yttrium alloys from molten salts was studied by electrochemical techniques.LiF-YF3 was electrolyte system with magnesium oxide and Yttrium oxide as raw materials.It was proved that Mg2+ and Y3+was deposited more prior than other ions during cyclic voltammetry and potential step measurement at 1050 °C.Voltammograms showed Mg2+ could be deposited at-0.5 V,and Y3+ could be deposited at-0.7 V on tungsten electrode compared with platinum electrode.The sedimentation of Mg2+ was more positive about 230 mV than that of other ions in electrolyte.The electrolytic codeposition of yttrium and magnesium was 0.58 V on condition that the weight ratio of Y2O3/MgO was 4:1.Chronopotentiogram indicated that the process of electrodeposition of magnesium-yttrium alloys on tungsten electrode was controlled by diffusion of ions from electrolyte to electrode interface.It was feasible to prepare Magnesium-Yttrium alloys by controlling content of ions in molten salt electrolyte. | 杨少华 杨凤丽 廖春发 李明周 王旭 | 2010 | Journal of Rare Earths2010，28，S1： | 10 |
| 20 | Mitigative Effect of La on Glycine max seedlings under Pb-Cd Compound Pollution显示文摘Mitigative effect of La on Glycine max seedlings under combined Pb and Cd pollution was studied throughpot culture experiment. The results show that the growth and metabolism of Glycine max seedlings are inhibited by thesolution with 500 mg·L-1 Pb+100 mg·L-1 Cd. When 30 mg·L-1 LaCl3 is used to spray Clycine max seedlings once,the injury effect of combined Pb and Cd pollution is reduced. The experiment proves that the effect is related to Lawhich can raise photosynthetic rate, chlorophyll content and activity of nitrate reductase, and reduce cell membrane permeability, content of Pb and Cd, and keep TTC reduction ability of Glyins max seedling. | 周青 黄晓华 曹玉华 张剑华 | 1999 | Journal of Rare Earths1999，17，4： | 10 |
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