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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 >Crystal structure, infrared reflectivity spectra and microwave dielectric properties of CaAl2O4 ceramics with low permittivity
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Crystal structure, infrared reflectivity spectra and microwave dielectric properties of CaAl2O4 ceramics with low permittivity

机译：CaAL2O4陶瓷的晶体结构，红外反射谱和微波介电性能低介电常数

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摘要

CaAl2O4 ceramics with low permittivity have been prepared via a solid state ceramic route. X-ray diffraction analysis and Rietveld refinement result demonstrated that CaAl2O4 ceramics belonged to the monoclinic structure with P2(1)/n space group. Dense ceramics with homogeneous microstructures were obtained when sintered at around 1450 degrees C, wherein excellent microwave dielectric properties (epsilon(r) = 8.9, Qf = 91,350 GHz, tau(f)= -55 ppm/degrees C) were achieved as well. Moreover, the infrared reflectivity spectra were measured and fitted to understand their intrinsic dielectric properties. Considering the merits of easy preparation, cheap raw materials and most importantly, the outstanding microwave dielectric properties, CaAl2O4 ceramics are expected to be promising candidates for low loss microwave dielectric ceramics. (C) 2019 Elsevier B.V. All rights reserved.
机译：通过固态陶瓷途径制备低介电常数的CaAL2O4陶瓷。 X射线衍射分析和RIETVELD细化结果证明CAAL2O4陶瓷属于具有P2（1）/ N空间组的单斜晶结构。 当烧结在约1450℃的烧结时获得致密陶瓷，其中优异的微波介电性能（ε（R）= 8.9，QF = 91,350GHz，TAU（F）= -55ppm /℃）。 此外，测量红外反射率光谱，以理解其内在电介质性能。 考虑到易于制备的优点，廉价的原料和最重要的是，出色的微波介电性能，CaAL2O4陶瓷预计将为低损耗微波介质陶瓷的候选者是有希望的。 （c）2019 Elsevier B.v.保留所有权利。

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