In-Sung Cho
,
Seung-Mok Yoo
,
Chae-Ho Lim
,
Jeong-Kil Choi
材料科学技术（英文）
Construction of integrated database including casting shapes with their casting design, technical knowledge, and thermophysical properties of the casting alloys were introduced in the present study. Recognition technique for casting design by industrial computer tomography was used for the construction of shape database. Technical knowledge of the casting processes such as ferrous and non-ferrous alloys and their manufacturing process of the castings were accumulated and the search engine for the knowledge was developed. Database of thermophysical properties of the casting alloys were obtained via the experimental study, and the properties were used for the in-house computer simulation of casting process. The databases were linked with intelligent casting expert system developed in center for e-design, KITECH. It is expected that the databases can help non casting experts to devise the casting and its process. Various examples of the application by using the databases were shown in the present study.
关键词:
Integrated database
,
null
,
null
贺慧
,
程璇
,
张颖
,
杨勇
功能材料
利用溶胶-凝胶预处理固相方法合成了锂离子电池正极材料LiM0.9Ti0.1O2(M=Ni,Co),通过XRD对合成的材料进行结构分析,并将其组装成电池进行了电化学测试,对两种材料LiN0.9Ti0.1和LiCo0.9Ti0.1进行了比较.结果发现,LiCo0.9Ti0.1O2的结构和性能要好于LiNi0.9Ti0.1O2,根据实验结果对其原因进行了初步的分析.
关键词:
锂离子电池
,
正极材料
,
电化学性能
那木吉拉图
,
阮永丰
,
苏小平
,
杨海
,
杨鹏
,
李楠
人工晶体学报
本文在CF4气氛中以提拉法成功地生长出高质量的掺入Tm3+、Ce3+的LiLuF4和LiYF4晶体,对比了Ar和CF4气氛中生长的LiYF4晶体的红外光谱特性,讨论了CF4气氛对LiM(M=Y,Lu)F4晶体生长的影响.同时测试了Tm3+、Ce3+在LiLuF4和LiYF4晶体中的有效分凝系数,从离子半径和晶胞畸变的角度,讨论了Tm3+、Ce3+在LiLuF4和LiYF4晶体中有效分凝系数差别的产生原因.
关键词:
LiYF4
,
LiLuF4
,
晶体生长
,
有效分凝系数
Journal of Alloys and Compounds
The phase diagram of the Ho-Ni binary system was investigated by X-ray diffraction, differential thermal analysis, optical microscopy and electron probe microanalysis techniques. The existence of eight intermediate phases has been confirmed: Ho3Ni, Ho3Ni2, HoNi, HoNi2, HoNi3, HO2Ni7, HoNi5, and Ho2Ni17. The homogeneity region of the HoNi2 phase extends from 65.6 to 66.7 at.% Ni. The other phases are line compounds. No appreciable solid solubility of holmium in nickel or of nickel in holmium was observed. Ho3Ni2 exists in two structural modifications depending on the temperature. HoNi and HoNi5 melt congruently at 1060 and 1370-degrees-C respectively. There are seven peritectic reactions and three eutectic reactions in this system.
关键词:
intermetallic compounds
王燕
,
常勇
,
殷绍唐
,
王晓光
,
曹余惠
人工晶体学报
doi:10.3969/j.issn.1000-985X.2002.04.014
本文采用Boltzmann分布近似,计算了不同温度下Tm→Ho的净能量转移;计算了实验中不同温度下Ho3+离子的荧光发射强度在整个Tm-Ho体系荧光发射中的比例.我们的实验和计算表明,对Tm-Ho准三能级体系采用Boltzmann分布近似,其计算结果是可信的.
关键词:
Cr,Tm,Ho∶YAG晶体
,
Boltzmann分布近似
,
能量转移效率
Materials Letters
The effect of various holmium content on the microstructure and compressive behavior of NiAl-28Cr-6Mo-0.15Hf eutectic alloy has been investigated by using combination of SEM, TEM and compression test. The results suggest that appropriate Ho addition improves the compressive ductility at room temperature and the high temperature strength at 1273 K of the alloy significantly. In addition, lamellar microstructure inside of eutectic cell and eutectic cell get refinement gradually, but the intercellular region become coarse, with increase of Ho content. Furthermore, Ni2Al3Ho phase, with hexagonal cristal structure, is observed in the alloy. (C) 2008 Elsevier B.V. All rights reserved.
关键词:
NiAl-based alloy;microstructure;mechanical properties;mechanical-properties;composites;toughness;cr
周红伟
,
丁夏楠
,
王新东
材料导报
doi:10.11896/j.issn.1005-023X.2016.02.001
利用高压静电纺丝技术与溶胶凝胶法相结合制备出了锂离子电池正极材料LiM0.1Ni0.4MnL5 O4 (M:Co,Cr,Fe)纳米纤维.采用X射线衍射(XRD)、场发射扫描电镜(FESEM)对材料的晶体结构和表面形貌进行了表征,并采用恒流充放电手段研究了材料在室温下的循环稳定性和倍率特性.结果表明:LiFe0.1Ni0.4Mn1.5O4材料以0.5C充放电循环100周后容量保持率高达95.5％,显示了良好的循环稳定性;而LiCr0.1 Ni0.4 Mn1.5 O4材料以10 C放电比容量仍高达120mAh/g,显示出了极好的倍率特性.
关键词:
锂离子电池
,
正极材料
,
LiM0.1Ni0.4Mn1.5O4
,
电化学性能
,
静电纺丝
赵业权
,
徐悟生
,
徐衍岭
,
杨春晖
,
徐玉恒
人工晶体学报
doi:10.3969/j.issn.1000-985X.1998.01.011
在生长LiNbO3晶体过程中掺进ZnO和Ho2O3,生长出Zn:Ho:LiNbO3晶体.测试了Zn:Ho:LiNbO3晶体的双折射梯度、光损伤阈值、吸收光谱和荧光光谱.研究表明,Zn:Ho:LiNbO3晶体是优良的激光介质材料.
关键词:
Zn:Ho:LiNbO3晶体
,
光损伤阈值
,
荧光光谱
,
吸收光谱
,
引上法晶体生长
,
激光晶体
Journal of Alloys and Compounds
We have studied the magnetic properties of Ho2Co17-xGax compounds (x less than or equal to 7) by means of magnetic measurements and X-ray diffraction on magnetically aligned powders. The Curie temperature and the spontaneous moment decrease strongly with increasing Ga concentration. The compounds that are magnetically ordered at roam temperature have an easy magnetisation direction at room temperature which is perpendicular to the c-direction. (C) 1998 Elsevier Science S.A.
关键词:
rare earth compounds;Co rich compounds;magnetic properties
成诗恕
,
程艳
,
赵呈春
,
李东振
,
徐晓东
,
徐军
人工晶体学报
采用中频感应提拉法成功生长出Yb (15 at%),Ho (1 at%):YAG激光晶体,研究了室温下晶体的吸收光谱,发射光谱特性和荧光寿命.吸收光谱中在938 nm处存在Yb3+的吸收带,能与InGaAs 激光二极管(LD)有效耦合,适合激光管二极抽运.荧光光谱中存在两个荧光主峰,分别位于1907 nm和2091 nm附近.研究表明:Yb,Ho:YAG晶体是一种有发展前景的激光增益介质.
关键词:
Yb,Ho:YAG晶体
,
提拉法
,
晶体生长
,
光谱特性
