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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Structural, photophysical and microwave dielectric properties of alpha-ZnMoO4 phosphor
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Structural, photophysical and microwave dielectric properties of alpha-ZnMoO4 phosphor

机译：α-ZnMoo4磷的结构，光药和微波介电性能

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Solid state reaction synthesis was employed for the production of triclinic zinc molybdate (alpha-ZnMoO4) crystal. X-ray diffraction (XRD) pattern, Rietveld refinement analysis, Fourier-transform infrared (FT-IR) and Fourier-transform Raman (FT-Raman) spectroscopy confirmed that alpha-ZnMoO4 exhibit a triclinic structure without evidence of any impurity phase. FT-IR spectroscopy gives information about vibrational features of Mo-O in the [MoO4] clusters. The 13 active vibrational modes were observed in Raman spectra from 100 to 1000 cm(-1). UV-Vis absorption spectroscopy was used for calculation of optical band gap. The band gap (E-g) of 4.12 eV was observed for a direct allowed transition. The photoluminescence (PL) spectrum of alpha-ZnMoO4 gives intense green emission. Microwave dielectric constant (epsilon(r)), temperature coefficient at the resonant frequency (tau(f)) and Q x f value were measured by Hakki-Coleman method and found to be 8.05, -121.81 ppm/degrees C and 48320 GHz respectively. These results suggested the applications of alpha-ZnMoO4 in LEDs, scintillating detectors and microwave device. (C) 2019 Elsevier B.V. All rights reserved.
机译：固态反应合成用于生产三斜晶系的钼酸锌（α-ZnMoO4）晶体。 X射线衍射（XRD）图案，Rietveld精修分析，傅里叶变换红外（FT-IR）和傅里叶变换拉曼（FT-拉曼）光谱证实的α-ZnMoO4表现出三斜晶结构，没有任何杂质相的证据。 FT-IR光谱给出关于在[的MoO 4]簇的Mo-O的振动特征的信息。在拉曼光谱中观察到的13种有源振动模式从100至1000厘米（-1）。用于光学带隙计算UV-Vis吸收光谱。观察到的直接允许跃迁4.12电子伏特的带隙（E-G）。的α-ZnMoO4的光致发光（PL）光谱给出强烈的绿色发光。微波介电常数（ε-（R）），在谐振频率（TAU（F））和Q温度系数X F值被哈基-科尔曼方法测定，结果为8.05，-121.81 PPM /℃，分别48320千兆赫。这些结果表明的α-ZnMoO4的应用在LED中，闪烁检测器和微波装置。 （c）2019 Elsevier B.v.保留所有权利。

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