Investigation of structural, optical and transport properties of MoO3-PbO-B2O3 glasses
Investigation of structural, optical and transport properties of MoO3-PbO-B2O3 glasses
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DOI：
10.1016/j.jallcom.2009.07.186
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发表时间：
2009-11
影响因子：
6.2
通讯作者：
Sanjay;N. Kishore;A. Agarwal
中科院分区：
文献类型：
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作者：
Sanjay;N. Kishore;A. Agarwal
组成为 xMoO3·(40−x)PbO·60B2O3 的重金属基氧化物玻璃是通过标准熔融淬火技术制备的。研究了玻璃化转变温度 (Tg)、密度、理论光学碱度、红外和直流电导率等各种性能。本系统的无定形性质通过 XRD 图案进行评估。密度 (d) 和玻璃化转变温度 (Tg) 的降低是由于钼和非桥接氧离子之间的交联程度较低，导致玻璃网络减弱。这些玻璃的结构变化已通过红外光谱监测。对于所有组合物，在 473-623K 温度范围内测量了温度对直流电导率的影响。 Mo5+和Mo6+阳离子之间存在极化跳跃传导机制表明这些玻璃充当纯电子半导体玻璃。还提出了这些玻璃的理论光学碱度值。
Heavy metal based oxide glasses of compositions xMoO3·(40−x)PbO·60B2O3have been prepared by the standard melt-quenching technique. The various properties such as the glass transition temperature (Tg), density, theoretical optical basicity, IR and DC conductivity have been studied. Amorphous nature of the present system was estimated by XRD patterns. The decrease in the density (d) and glass transition temperature (Tg) is due to the lower degree of cross-bonding between the Molybdenum and non-bridging oxygen ions resulting in a weakening of glass network. The structural changes in these glasses have been monitored by IR spectroscopy. The effect of temperature on the DC conductivity has been measured in the temperature range 473–623K for all the compositions. The existence of a polaronic hopping conduction mechanism between Mo5+and Mo6+cations suggested that these glasses act as purely electronic semiconductor glasses. The values of theoretical optical basicity of these glasses have also been presented.