Crystal structure, infrared spectra and microwave dielectric properties of new ultra low-loss Li6Mg7Ti3O16 ceramics
Crystal structure, infrared spectra and microwave dielectric properties of new ultra low-loss Li6Mg7Ti3O16 ceramics
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DOI：
10.1016/j.ceramint.2017.06.184
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发表时间：
2017-11
影响因子：
5.2
通讯作者：
H. Pan;H. T. Wu
中科院分区：
文献类型：
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作者：
H. Pan;H. T. Wu
采用传统固相反应法制备了新型超低损耗Li 6 Mg 7 Ti 3 O 16（LMT）陶瓷。研究了其晶体结构、烧结特性、红外光谱和微波介电性能。采用Rietveld精修方法研究了晶体结构，得到了晶格参数。烧结样品的微波介电性能与烧结特性密切相关。计算了LMT陶瓷的键能，分析了其内在因素。主要的极化贡献主要取决于声子振荡的吸收。在1550 °C下烧结的陶瓷表现出优异的性能：εr= 15.27，Q·ε = 209，400 GHz，τf= − 11.32 ppm/°C。
New ultra low-loss Li6Mg7Ti3O16(LMT) ceramics were prepared via the conventional solid-state reaction method. The crystal structure, sintering characteristics, infrared spectrum and microwave dielectric properties were studied. Rietveld refinement was performed to research the crystal structure and the lattice parameters were obtained. The microwave dielectric properties of the sintered samples exhibited the close relationship with the sintering characteristics. The bond energy of the LMT ceramics was calculated to analyze the intrinsic factors. The major polarization contribution was mainly dependent on the absorption of phonon oscillation. The ceramics sintered at 1550 °C exhibited the excellent properties ofεr= 15.27,Q·ƒ= 209,400 GHz andτf= − 11.32 ppm/°C.