Structure of MoO3-WO3-La2O3-B2O3 glasses and crystallization of LaMo1-xWxBO6 solid
Structure of MoO3-WO3-La2O3-B2O3 glasses and crystallization of LaMo1-xWxBO6 solid
复制标题
MoO3-WO3-La2O3-B2O3玻璃的结构和LaMo1-xWxBO6固体的结晶
DOI：
10.1016/j.jnoncrysol.2015.09.004
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发表时间：
2015
影响因子：
3.5
通讯作者：
R. Iordanova
中科院分区：
文献类型：
--
作者：
L. Aleksandorov;T. Komatsu;K. Shinozaki;T. Honma;R. Iordanova
采用常规熔体淬火法制备了标称成分为（50−x） moo3 - xwo3 - 25la2o3 - 25b2o3的玻璃，x = 0、10、20、30、40和50 (mol%)，并用拉曼散射光谱、红外光谱、x射线光电子能谱和x射线衍射分析（XRD）对其结构和结晶行为进行了研究。结果表明，随着wo3取代MoO3，玻璃化转变温度和结晶温度以及抗结晶热稳定性均有所提高。结晶样品中形成了LaMox−1wxo6固溶体。提出了玻璃结构主要由四面体（MoO4）2 -和（WO4）2 -单元组成，提供约330,830和920 cm - 1的拉曼带，以及由B-O-B键组成的网络。当wo3含量增加时，（WO4）2−部分转变为八面体wo6单元。
The glasses with the nominal compositions of (50 − x)MoO3–xWO3–25La2O3–25B2O3with x = 0, 10, 20, 30, 40, and 50 (mol%) were prepared using a conventional melt quenching method and their structure and crystallization behavior were investigated from Raman scattering spectroscopy, infrared spectroscopy (IR), X-ray photoelectron spectroscopy (XPS), and X-ray diffraction analysis (XRD). It was found that the glass transition and crystallization temperatures and the thermal stability against crystallization increase with the substitution of WO3for MoO3. The formation of LaMox − 1WxO6solid solutions was found in the crystallized samples. It was proposed that the glass structure is built up mainly from tetrahedral (MoO4)2 −and (WO4)2 −units providing the Raman bands of around 330, 830, and 920 cm− 1and the network consisting of B–O–B bonds. The partial transformation from (WO4)2 −to octahedral WO6units was proposed to occur when the content of WO3increases.