Low-firing and microwave dielectric properties of Na2YMg2V3O12 ceramic

Low-firing and microwave dielectric properties of Na2YMg2V3O12 ceramic
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Na2YMg2V3O12陶瓷的低烧和微波介电性能

DOI:
10.1016/j.ceramint.2015.10.163
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发表时间:
2016-02
影响因子:
5.2
通讯作者:
Li Chunchun
Li Chunchun
中科院分区:
材料科学1区
文献类型:
--
作者:
Xiang Huaicheng;Fang Liang;Jiang Xuewen;Li Chunchun

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采用常规固相反应方法制备了具有石榴石结构的低烧微波介质陶瓷Na2YMg2V3O12。 X射线衍射数据表明Na2YMg2V3O12陶瓷结晶成空间群Ia-3d的立方石榴石结构。在850℃下烧结时,可以获得相对密度为95.4%的致密Na2YMg2V3O12陶瓷,并表现出最佳的微波性能,相对介电常数为12.3,品质因数为23,180GHz(10.2GHz时),τf值接近零,为-4.1ppm/℃。研究发现,在 850 °C 下烧结时,Na2YMg2V3O12 与银电极具有化学相容性。这些优点使得Na2YMg2V3O12成为良好的微波介质陶瓷,在LTCC技术中具有潜在的应用前景。
A low-firing microwave dielectric ceramic Na2YMg2V3O12with garnet structure was prepared via the conventional solid-state reaction method. X-ray diffraction data shows that Na2YMg2V3O12ceramic crystallized into a cubic garnet structure with a space groupIa-3d. Dense Na2YMg2V3O12ceramic with a relative density of 95.4% could be obtained when sintered at 850 °C and exhibited the optimum microwave properties with a relative permittivity of 12.3, a quality factor of 23,180 GHz (at 10.2 GHz), and a nearly zeroτfvalue of −4.1 ppm/°C. Na2YMg2V3O12was found to be chemically compatible with silver electrode when sintered at 850 °C. These merits make Na2YMg2V3O12a good microwave dielectric ceramic with potential applications in LTCC technology.
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