Influence of W substitution on crystal structure, phase evolution and microwave dielectric properties of (Na(0.5)Bi(0.5))MoO(4) ceramics with low sintering temperature.
Influence of W substitution on crystal structure, phase evolution and microwave dielectric properties of (Na(0.5)Bi(0.5))MoO(4) ceramics with low sintering temperature.
复制标题
W取代对低烧结温度(Na0.5Bi0.5)MoO4陶瓷晶体结构、相演化及微波介电性能的影响
DOI：
10.1038/s41598-017-03620-0
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发表时间：
2017-06-09
影响因子：
4.6
通讯作者：
Yue ZX
中科院分区：
文献类型：
--
作者：
Pang LX;Zhou D;Qi ZM;Yue ZX
本文采用固相反应法制备了（Na0.5Bi0.5）（Mo1−xWx）O4 （x = 0.0, 0.5和1.0）陶瓷。在约720℃的烧结温度下，所有样品均能致密化。扫描电镜观察到晶粒尺寸在2~8 μm之间的致密均匀组织。在25~120℃范围内，（Na0.5Bi0.5）（Mo0.5W0.5）O4陶瓷的微波介电常数与温度无关，频率温度系数（TCF）为~ - 6 ppm/℃，介电常数为~28.9，Qf值为12,000~14,000 GHz。采用Rietveld方法对晶体结构进行细化，晶格参数为a = b = 5.281 (5) Å和c = 11.550 (6) Å，空间群为I 41/a（88）。（Na0.5Bi0.5）（Mo1−xWx）O4陶瓷可能是低温共烧陶瓷（LTCC）技术的良好候选材料。
In this work, the (Na0.5Bi0.5)(Mo1−xWx)O4 (x = 0.0, 0.5 and 1.0) ceramics were prepared via solid state reaction method. All the samples can be well densified at sintering temperature about ~720 °C. Dense and homogeneous microstructure with grain size lying between 2~8 μm can be observed from scanning electron microscopy (SEM). Microwave dielectric permittivity of the (Na0.5Bi0.5)(Mo0.5W0.5)O4 ceramic was found to be temperature-independent in a wide range between 25~120 °C with a temperature coefficient of frequency (TCF) ~−6 ppm/°C, a permittivity ~28.9, and Qf values 12,000~14,000 GHz. Crystal structure was refined using Rietveld method and lattice parameters are a = b = 5.281 (5) Å and c = 11.550 (6) Å with a space group I 41/a (88). The (Na0.5Bi0.5)(Mo1−xWx)O4 ceramics might be good candidate for low temperature co-fired ceramics (LTCC) technology.