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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 >Study of electrical properties of MoO3-Fe2O3-P2O5 and SrO-Fe2O3-P2O5 glasses by impedance spectroscopy. II
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Study of electrical properties of MoO3-Fe2O3-P2O5 and SrO-Fe2O3-P2O5 glasses by impedance spectroscopy. II

机译：通过阻抗光谱研究MoO3-Fe2O3-P2O5和SrO-Fe2O3-P2O5玻璃的电性能。 II

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The electrical and dielectric properties for three series of MoO3-Fe2O3-P2O5 and one series of SrO-Fe2O3-P2O5 glasses were measured by impedance spectroscopy in the frequency range from 0.01 Hz to 3 MHz and over the temperature range from 303 to 473 K. It was shown in Part I that the MoO3 is incorporated into phosphate network and the structure/properties are strongly influenced by the overall O/P ratio. The Fe2O3 content and Fe(II)/Fe-tot ratio in these glasses have significant effects on the electrical conductivity and dielectric permittivity. With decreasing Fe2O3 content in MoO3-Fe2O3-P2O5 glasses with O/P at 3.5 the dc conductivity, sigma(dc)(omega) decreases for two orders of magnitude, which indicates that the conductivity for these glasses depends on Fe2O3 and is independent of the MoO3 content. Also, the dielectric properties such as epsilon'(omega), epsilon"(omega) and sigma(ac)(omega) and their variation with frequency and temperature indicates a decrease in relaxation intensity with increase in the concentration of MoO3. On the other hand, the do conductivity. for MoO3-Fe2O3-P2O5 glasses with O/P > 3.5 increases with the substitution of MoO3 which has been explained by an increase in the number of non-bridging oxygens and formation of Fe-O-P bonds that are responsible for formation of small polarons. The increase in the dielectric permittivity, epsilon'(omega) with increasing MoO3 content is attributed to the increase in the deformation of glass network with increasing bonding defects. For SrO-Fe2O3-P2O5 glasses the conductivity and dielectric permittivity remained constant with increasing SrO. (C) 2003 Elsevier B.V. All rights reserved. [References: 27]
机译：通过阻抗光谱在0.01 Hz至3 MHz的频率范围内以及303至473 K的温度范围内通过阻抗谱法测量了三系列MoO3-Fe2O3-P2O5和一系SrO-Fe2O3-P2O5的电和介电性能。在第一部分中表明，MoO3被掺入磷酸盐网络中，其结构/性能受到总O / P比的强烈影响。这些玻璃中的Fe2O3含量和Fe（II）/ Fe-tot比率对电导率和介电常数有重要影响。随着O / P为3.5的MoO3-Fe2O3-P2O5玻璃中Fe2O3含量的降低，直流电导率sigma（dc）Ω降低了两个数量级，这表明这些玻璃的电导率取决于Fe2O3，并且与Fe2O3无关。 MoO3含量。而且，诸如ε，ε和ω随频率和温度的变化的介电特性表明松弛强度随MoO3浓度的增加而降低。对于O / P> 3.5的MoO3-Fe2O3-P2O5玻璃，其电导率随MoO3的取代而增加，这可以通过非桥连氧的数量增加和形成Fe-OP键的原因来解释MoO3含量增加时，介电常数ε的增加是由于玻璃网络的变形增加，键合缺陷增加所致;对于SrO-Fe2O3-P2O5玻璃，其电导率和介电常数（S）2003 Elsevier BV保留所有权利[参考文献：27]

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