Low-firing and temperature stable microwave dielectric ceramics: Ba2LnV3O11 (Ln = Nd, Sm)

Li, Chunchun, Xiang, Huaicheng, Xu, Minyu, Khaliq, Jibran, Chen, Junqi and Fang, Liang (2018) Low-firing and temperature stable microwave dielectric ceramics: Ba2LnV3O11 (Ln = Nd, Sm). Journal of the American Ceramic Society, 101 (2). pp. 773-781. ISSN 0002-7820

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Abstract

Low-firing and temperature stable microwave dielectric ceramics of Ba2LnV3O11 (Ln = Nd, Sm) were prepared by solid-state reaction. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to investigate the phase purity, crystal structure, sintering behavior, and microstructure. The XRD patterns indicated that Ba2LnV3O11 (Ln =Nd, Sm) ceramics belong to monoclinic crystal system with P21/c space group in the whole sintering temperature range (800-900 °C). Both ceramics could be well densified at 880 °C for 4 h with relative densities higher than 96%. The Ba2LnV3O11 (Ln =Nd, Sm) samples sintered at 880 °C for 4 h exhibited excellent microwave dielectric properties: εr = 12.05, Q×f = 23,010 GHz, τf = –7.7 ppm/oC, and εr = 12.19, Q×f = 27,120 GHz, τf = –16.2 ppm/oC, respectively. Besides, Ba2LnV3O11 (Ln =Nd, Sm) ceramics could be well co-fired with the silver electrode at 880 °C.

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