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首页> 外文会议>DAE Solid State Physics Symposium >Thermal characteristics and short-range structure in TiO_2-TeO_2 and Bi_2O_3-TeO_2 glasses: A comparative study
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Thermal characteristics and short-range structure in TiO_2-TeO_2 and Bi_2O_3-TeO_2 glasses: A comparative study

机译：TiO_2-TEO_2和BI_2O_3-TEO_2眼镜的热特性和短距离结构：比较研究

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摘要

The glass forming ability of titanium tellurite and bismuth tellurite glasses have been studied and compared. Titanium tellurite glasses require high melt quenching rates and hence, were synthesized by splat-quenching technique while the bismuth tellurite glasses require further high quenching rates owing to which they were synthesized using ice quenching. It is observed that xTiO_2-(100-x)TeO_2 glasses have poor glass forming ability (GFA), but for bismuth tellurite glasses in addition to their poor ability to form glasses, they have a very limited glass formation range (up to 5-mol %). At high Bi_2O_3 content (10-mol %) long-range order co-exists with the disturbed short-range order due its anti-glass phase formation. Bi_2O_3 and TiO_2 incorporated jointly into the tellurite network also shows the properties of their anti-glass nature since there exist sharp peak superimposed upon a broad hump in XRD while the vibrational studies show broad bands. However, incorporating B_2O_3 into the system suppresses the anti-glass phases present and forms purely a glassy sample. Raman studies found a decrease in the Te—O coordination with increase in Bi_2O_3 and B_2O_3 concentration while no effect on the Te-O speciation is observed for TiO_2 modified tellurite glasses.
机译：研究并比较了钛碲酸盐和铋玻璃的玻璃形成能力。钛碲酸盐玻璃需要高熔体淬火速率，因此通过分裂淬火技术合成，而铋碲酸盐玻璃需要进一步高淬火速率，因此使用冰淬火合成它们。观察到Xtio_2-（100-x）TEO_2眼镜具有较差的玻璃形成能力（GFA），但对于碲菊酯玻璃除了形成玻璃的差，它们具有非常有限的玻璃形成范围（最多5- mol％）。在高Bi_2O_3含量（10mol％）的远程顺序与其抗玻璃相形成的干扰的短距号共存。 Bi_2O_3和TiO_2联合进入碲技术网络也显示出抗玻璃性质的性质，因为振动研究显示宽带的XRD中的宽驼峰上存在尖锐的峰值。然而，将B_2O_3纳入系统抑制存在的抗玻璃相，并纯粹形成玻璃状样品。拉曼的研究发现，TE-O配位下降，随着BI_2O_3和B_2O_3浓度的增加，而对于TiO_2改性的碲菊眼镜，观察到对TE-O格纹的影响。

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