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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >X-ray photoelectron spectroscopy (XPS) and magnetic susceptibility studies of vanadium phosphate glasses
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X-ray photoelectron spectroscopy (XPS) and magnetic susceptibility studies of vanadium phosphate glasses

机译：磷酸钒玻璃的X射线光电子能谱（XPS）和磁化率研究

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摘要

Vanadium phosphate glasses with the nominal chemical composition [(V2O5)(x)(P2O5)(1-x)], where x = 0.30. 0.40, 0.50, and 0.60, have been prepared and investigated by X-ray photoelectron spectroscopy (XPS) and magnetization measurements. Asymmetries found in the O 1s, P 2p, and V 2p core level spectra indicate the presence of primarily P-O-P, P-O-V, and V-O-V structural bonds, a spin-orbit splitting of the P 2p core level, and more than one valence state of V ions being present. The magnetic susceptibility data for these glasses follow a Curie-Weiss behavior which also indicates the presence of some V ions existing in a magnetic state, i.e., a valence state other than that of the non-magnetic V5+. From qualitative comparisons of the abundance of the bridging oxygen or P-O-P sites as determined from the areas under the various O 1s peaks with the abundances of differing phosphate structural groups associated with the presence of different valence states of the vanadium ions, a glass structure model consisting of a mixture of vanadate phosphate phases is proposed for these glass samples. These include V2O5, VOPO4, (VO)(2)P2O7, VO(PO3), and V(PO3)(3) with the abundance of orthophosphate (PO4)(3-) units increasing with increasing vanadium content.
机译：具有标称化学成分[（V2O5）（x）（P2O5）（1-x）]的磷酸钒玻璃，其中x = 0.30。已准备好0.40、0.50和0.60，并通过X射线光电子能谱（XPS）和磁化强度测量进行了研究。在O 1s，P 2p和V 2p核心能级谱中发现的不对称性表明主要存在POP，POV和VOV结构键，P 2p核心能级的自旋轨道分裂以及V的一个以上价态离子存在。这些眼镜的磁化率数据遵循居里-魏斯行为，该行为还指示存在一些处于磁性状态（即，非磁性V5 +以外的价态）的V离子。根据对各种氧1峰下面积所确定的架桥氧或POP位置的丰度进行定性比较，以及与钒离子不同价态的存在相关的不同磷酸盐结构基团的丰度，建立了一种玻璃结构模型对于这些玻璃样品，提出了一种钒酸盐磷酸盐相混合物的制备方法。这些包括V2O5，VOPO4，（VO）（2）P2O7，VO（PO3）和V（PO3）（3），正磷酸盐（PO4）（3-）单元的含量随钒含量的增加而增加。

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