材料期刊网

Development of Biomimetic Needle-like Apatite Nanocrystals by a Simple New Method

Jie WEI , Yubao LI , Yi ZUO , Xueling PENG , Li ZHANG

材料科学技术（英文）

A new method of calcium nitrate and sodium phosphate as reactants was employed to prepare biomimetic apatite nanocrystals by a simple heating treatment in water. The structure and properties of the apatite crystals were investigated by TEM, XRD, IR, ICP and TG. It is found that the apatite nanocryst...

关键词: Biomimetic , null , null , null

0℃时YI3-C6H12N4·HI-H2O的相图及YI3·C6H12N4·HI·14H2O的合成与表征

王丽 , 吴希文 , 张晨鼎 , 张通 , 简丽 , 武朝军 , 周涛

稀土 doi:10.3969/j.issn.1004-0277.1999.02.003

采用湿渣法研究了0℃时碘化钇(YI3)-乌洛托品氢碘酸盐(C6H12N4.HI)-水(H2O)的三元体系相平衡,绘制了该体系的等温溶解度相图,相图分析结果表明,该体系中有组成为YI

关键词: 相平衡 , 碘化钇 , 乌洛托品氢碘酸盐 , 配合物

氧化锌压敏陶瓷几何效应的统计法研究

李盛涛 , 刘辅宜 , 贾广平

无机材料学报

本文实验研究了ZuO压敏陶瓷击穿、非线性指数α和脉冲大电流冲击后击穿场强E_1mA变化率的几何效应．对ZuO晶粒尺寸的统计分析表明它基本服...

关键词: ZnO陶瓷 , dimensional effect , microstructure

白色开金的色度参数和白色分级

宁远涛

贵金属

评述了合金元素对Au的漂白效果和机制，介绍了白色开金的几种色度参数，如CIE-L a*b*色度参数和颜色盒，CIE-LAB-C-H-L米制色度参数和基于CIE-XYZ色度参数的ASTM D1925黄色指数YI，讨论了某些白色开金的色度参数...

关键词: 金属材料 , Au合金 , 白色开金 , 色度参数 , 色度图

抗氧剂在聚丙烯中的应用研究

徐旸 , 汪艳 , 傅轶

合成材料老化与应用

采用多次挤出的方法和氧化诱导期(OIT)方法考察了抗氧剂对聚丙烯热氧稳定性的影响,测定了各次挤出试样的熔体流动速率(MFR)、黄度指数(YI)、力学性能以及氧化诱导期(OIT).实验结果表明:添加由主抗氧剂1010和辅抗氧剂168组成的复...

关键词: 聚丙烯 , 抗氧剂 , 热稳定性

Mean-field theory for ferroelectricity in Ca(3)CoMnO(6)

Physical Review B

An elastic Ising model for CoMnO(6) chain is proposed to explain the ferroelectricity induced by collinear magnetic order in Ca(3)CoMnO(6), and then a mean-field theory with interchain spin interactions based on this model is developed. With inclusion of the dynamics of polarization domains at finit...

关键词: calcium compounds;cobalt compounds;dielectric polarisation;ferroelectricity;Ising model;magnetic susceptibility;multiferroics;optical susceptibility;one-dimensional oxides;magnetic-properties;multiferroics;ca3co1+xmn1-xo6

闪烁晶体用高纯无水稀土卤化物的制备与表征

余金秋 , 彭鹏 , 刁成鹏 , 吴浩 , 何华强

人工晶体学报

LaBr3 ∶Ce、LuI3 ∶Ce、SrI2 ∶Eu等新型卤化物闪烁晶体因其高光输出、高能量分辨率等优异的闪烁特性而引起人们的广泛关注.高纯无水稀土卤化物是生长上述闪烁晶体所必需的原料,但其制备困难和高昂成本,严重制约了这些晶体的发展和应用.本文报道了无水LaBr3、CeBr3、LaCl3、CeC...

关键词: 闪烁晶体 , 稀土卤化物 , 制备 , 表征

化学成分对TiC-Ni系金属陶瓷显微组织的影响

章晓波 , 刘宁 , 袁红梅 , 荣春兰

硬质合金 doi:10.3969/j.issn.1003-7292.2008.01.002

为探究Mo、WC、ZrC对TiC-Ni系金属陶瓷组织的影响,真空烧结制备了TiC-Ni系金属陶瓷.利用X射线衍射仪(X-ray diffraction,XRD)、扫描电子显微镜(scanning electron microscope,SEM)、能谱仪(energy dispersive spect...

关键词: 金属陶瓷 , 显微组织 , 微裂纹 , 断裂韧性

Fused thiophene-split oligothiophenes with high ionization potentials for OTFTs

Synthetic Metals

Fused thiophene-split oligothiophenes were synthesized by Suzuki coupling. The relationship between the structure of these fused thiophene-split oligothiophenes and DH-6T (alpha.omega-dihexylsexithiophene) and their performance in OTFTs was discussed. The realignment of HTTfTTTH (2,5-bis-(5'-hexyl-[...

关键词: OTFT;Fused thiophene;Oligothiophene;Ionization potential;Air;stability;thin-film transistors;field-effect transistors;high-mobility;organic;semiconductors;carrier mobility;copolymers;oligomers;performance;polymers