【摘 要】
：
The structure of Tb:Mo:PbWO4 crystals was investigated by Raman spectra and the results showed that the spectra were varied differently by doping dopants in dif
【机 构】
：
The Department of Applied Chemistry,The Department of Material
论文部分内容阅读
The structure of Tb:Mo:PbWO4 crystals was investigated by Raman spectra and the results showed that the spectra were varied differently by doping dopants in different ranges of shift. Rotation-vibration, curving-vibration and non-symmetrical stretching-vibration had been investigated on the spectra. Rotation-vibration intensity of [WO4]2- group is weakened and curving-vibration intensity is undergirded; low Mo6+ doping enhances the intensity of non-symmetrical stretching-vibration, with the concentration of Mo6+ increasing, the intensity is weakened. So it could be inferred that Tb3+ ion replaced the vacancy of Pb, when achieving at a certain concentration, Tb3+ ion would substitute for the lattice of Pb2+, Mo6+ ion would substitute for W lattice and generate [MoO4]2- new group, these are the main reason for the properties changing. Furthermore it could suggest that the impurity ions doped in tetrahedral positions, strongly affect the electron-phonon coupling in [WO4]2-, which makes the intensities of the vibration changed regularly.
其他文献
MicroRNAs (miRNAs) represent a class of small non-coding RNA molecules that play a crucial role in post-transcriptional gene regulation. Several conserved and s
The presence/absence variants(PAVs) are a major source of genome structural variation and have profound effects on phenotypic and genomic variation in animals a
SQUAMOSA promoter binding protein-likes (SPLs) are plant-specific transcription factors playing vital regulatory roles in plant growth and development. There is
用简单有效的静电纺丝法制备了Ce掺杂的In2O3纳米纤维材料.采用X射线衍射(XRD)、透射电子显微镜(TEM)、高分辨率透射电子显微镜(HRTEM)和扫描电子显微镜(SEM)对合成样品的晶
The extreme climate of the Canadian Prairies poses a major chal enge to improve yield. Although it is possible to breed for yield per se, focusing on yield-rela
通过对突出危险煤渗透性试验研究,系统分析了不同围压、不同瓦斯压力和不同应力-应变状态条件下突出煤样的渗透特性,分别建立了突出危险煤的渗透性与围压、瓦斯压力和应力-应
A simple and versatile method for the synthesis of 1,5-benzodiazepines from o-phenylenediamine and ketones in the presence of solvents and under solvent-free co
借鉴网络模体的研究方法,对软件网络的局部特性进行了研究.通过对138个开源JAVA软件系统的实验比较,找出了软件系统中3种典型的网络模体,并发现软件系统因规模和交互的不同,
The osteoblast with the β-TCP ceramic was co-cultured. Scanning electron microscopy shows the cells adhered onto β-TCP ceramic surface and grew better, provin
Composite thin films of PbTiO3 nano-crystals and high transparency polymer polyetherketone(PEK-c) for application of non-linear optical devices were prepared by