B.Z. Li1)
,
Y.P. Song1)
,
K.U. Kainer2)
,
H. Zhang3)
,
J.P.Xie1) and R.Xiang4) 1) Department of Materials Engineering
,
Luoyang Institute of Technology
,
Luoyang 471039
,
China2) Institute of Material Science and Technology
,
TU Clausthal
,
D 38678 Clausthal Zellerfeld
,
Germany 3) Institute of Mechanicaland Electrical Engineering
,
Zengzhou University
,
Zengzhou 450052
,
China 4) Luoyang Steeland Iron Group Corp
,
Luoyang 471023
,
China
金属学报(英文版)
Theinvestigation of physicometallurgicalphenomena forthe CC formingof WCP/ Fe Ccom posites wasperformed. Resultsshow that underthe patentcondition, WCP/ Fe Ccomposite surfacelayerof16 20 m m heavycross sectioncan beacquiredintheoutsideofa hollow cylin der. The surface of CTC particlescould be partially dissolved by Fe containing melt. Thefineshortstick like WCcrystallitesarein situseparated neartothesurfaceof CTC particles.Far from the CTC particles,someseparated, finetungsten carbidecrystallitesand Fe, W,Mo and Cretc. containing web composite carbides, are distributed on the matrix of WCP/ Fe Ccomposite. Fe Calloy matrix of the hollow composite cylinder is alloyed in differenthigh levels.
关键词:
physicometallurgical phenomena
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null
,
null
郑翠红
,
ZHU Wei-Chang
,
王露
应用化学
doi:10.3969/j.issn.1000-0518.2008.08.026
采用共沉淀法合成了Y0.95Eu0.05(P1-xVx)O4(x:0,0.8)红色荧光粉.用X射线衍射、透射电子显微镜及真空紫外发射光谱测试技术对其相组成、粉体形貌和发光性能进行了表征.结果表明,制得的Y0.95Eu0.05(P1-xVx)O4(x:0,0.8)荧光粉的粒径约为300 nm,在147 nm真空紫外激发下,发射光谱的主峰位于619 nm;与Y0.95Eu0.05PO4荧光粉相比,Y0.95Eu0.05(P0.2V0.8)O4具有更好的色纯度,它的色度坐标更接近国际电视标准委员会(NTSC)规定的红色色度坐标(0.67,0.33),是具有很好应用前景的PDP红色荧光粉.
关键词:
Y0.95Eu0.05(P1-xVx)O4红色荧光粉
,
发射光谱
,
色度坐标
,
共沉淀
曹笃盟
,
李志友
,
周科朝
稀有金属材料与工程
采用固相反应法制备了Li1+xV3-yMyO8(M=Mo,P;0≤y≤0.4),研究了不同Mo和P含量对Li1+xV3O8相的影响,并首次对其进行了高温阴极放电性能的研究.结果表明:Mo和P掺杂量分别为y≤0.2和y＜0.2时可获得纯Li1+xV3O8相;Mo掺杂使Li1+xV3O8峰值电压提高0.3 V,比容量提高25%,嵌入的Li+量最高可达x=3.8;P掺杂(y≤0.20)对Li1+xV3O8的峰值电压和比容量影响较小.化学嵌锂实验也证实掺杂后的材料具有更快的Li+嵌入速度.
关键词:
Li1+xV3O8
,
热电池
,
掺杂
,
比容量
Applied Physics Letters
The effect of nonmagnetic Y partial substitution at the Dy site in Dy(1-x)Y(x)MnO(3) up to x=0.2 on magnetism, specific heat, and ferroelectricity is investigated, which resulted in a preliminary multiferroic phase diagram. It is revealed that the Y partial substitution suppresses the Dy-spin ordering point (T(Dy)) and ferroelectric ordering point (T(FE)) but enhances the Mn-spin ordering point (T(N)). The interaction between the spins of Dy and Mn is remarkably affected by Y substitution. The measured electrical polarization depends on the Y substitution in a complex way because the ferroelectricity is sensitive to the interaction between the spins of Dy and Mn. (c) 2011 American Institute of Physics. [doi: 10.1063/1.3536506]
关键词:
ferroelectricity;polarization
史伟
,
王天新
,
王顺花
,
石宗利
兵器材料科学与工程
doi:10.3969/j.issn.1004-244X.2009.05.017
通过金相分析、扫描电镜等测试手段,对含有1%稀土Y元素的AM50和AZ91镁合金的微观组织和腐蚀性能进行研究,结合镁合金的腐蚀形貌,分析对比两种镁合金在相同腐蚀条件下的腐蚀机理.结果表明,由于两种镁合金成分上的差异,使得AM50-1Y较AZ91-1Y在实验室所采取的腐蚀条件下具有不同的耐腐蚀性能.
关键词:
AM50镁合金
,
AZ91镁合金
,
稀土Y
,
腐蚀
王桂英
,
唐永刚
,
毛强
,
郭腾
,
刘宁
,
彭振生
稀有金属
doi:10.13373/j.cnki.cjrm.2014.03.007
用固相反应法制备了Y1-xDyxCrO3(z =0,0.1)多晶样品.通过X射线衍射(XRD)图谱检测了样品的结构,测量了样品的磁性,作了磁化强度-温度(M-T)曲线、磁化强度-磁场(M-H)曲线,研究了Dy3替代Y3+对Y1-xDyxCrO3体系磁性质的影响.结果表明,Dy3替代多铁性YCrO3中的Y3+对YCrO3的磁性有效大影响.YCrO3在奈尔温度TN=139 K以下呈倾角反铁磁,显示弱铁磁性;Dy3+替代y3+后的Y0.gDy0.1CrO3样品,在50 K＜T＜142K温区,少量Dy3+在两相邻Cr3+产生的倾角反铁磁内场作用下沿内场反方向排列,使铁磁性减弱;在T＜50 K温区,Dy3+-O2--Dy3+层的铁磁性与Cr3+-O2--Cr3+层的铁磁性耦合,铁磁性增强.
关键词:
多铁性材料
,
Dy替代
,
磁性质
李酽
,
汪信
,
岳明波
,
陆路德
,
朱俊武
材料导报
首次以天然红辉沸石水热合成了Y型、P型分子筛,以IR研究了水热合成体系中分子筛结构的演变及晶相分布规律.研究表明,在高H2O/Na2O、低Ca2+/Na+体系中,主晶相为Y型分子筛,在低H2O/Na2O、高Ca2+/Na+体系中,主晶相为P型分子筛.
关键词:
红辉沸石
,
水热合成
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Y型分子筛
,
P型分子筛
,
红外光谱
李果
,
沈腾明
,
赵勇
低温物理学报
doi:10.3969/j.issn.1000-3258.2005.z1.004
利用固相反应法制备了分别掺杂Sr和Ce的PrLaCuOz系列氧化物.XRD衍射结果表明,Sr的掺杂形成了典型的空穴型掺杂的T-214结构,Ce的引入形成了典型的电子型掺杂的T′-214结构.利用Quantum Design PPMS-VSM对所有样品的进行了M-T测量(5～300K;100高斯和5000高斯).临界温度随掺杂量变化的关系表明,当0.08≤x≤0.30时,PrLa1-xSrxCuOz(PLSCO)具有超导电性,并在x=0.15时达到最高值Tcmax=26K;当0.08≤y≤0.15时,Pr1-y LaCeyCuOz (PLCCO)具有超导电性,Tcmax=24.9K出现在y=0.12处.磁性质测量还表明,Sr的引入对体系的磁矩影响不大,而Ce的掺入使样品在35K附近出现了反铁磁转变.
关键词:
掺杂
,
电子型
,
空穴型
,
载流子`
Chinese Physics Letters
Magnetic properties of spin-ladder compounds Sr(14)(Cu(1-y)Fe(y))(24)O(41) (0 <= y <= 0.05) are investigated in the temperature range from 10 to 300 K. The result reveals that all the samples exhibit magnetic crossover behavior in the paramagnetic range, and Fe(3+) doping can efficiently increase the susceptibility due to the large moment of Fe(3+). Both the observations are consistent with our previous investigation on transport behaviors, indicating the strong correlation between the magnetism and transport behaviors. The spin gap is evidenced in all the samples, and strengthens as Fe(3+) doping level increases, which can be associated with the antiferromagnetic interaction between Fe(3+) and Cu cations.
关键词:
metal-insulator-transition;material sr14cu24o41;cuo2 chains;superconductivity;dynamics;state;gap;nmr;sr14-xcaxcu24o41;interplay
