Lattice vibrational characteristics and structure-property relationships of SrWO4- x wt.% LiF (x = 0.5–3.0) microwave dielectric ceramics

Song, Fuzhou; Wang, Xiangyu; Lv, Jiqing; An, Zhongfen; Xu, Yue; Zhang, Lingcui; Guo, Hongyu; Zhou, Di; Zhou, Huanfu; Shi, Feng

doi:10.1016/j.ceramint.2022.11.101

Cited by 8 publications

(1 citation statement)

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“…By adding LiF to the BaFe 0.5 Nb 0.5 O 3 ceramic system, Intatha et al [16] successfully reduced the sintering temperature and improved the sintering characteristics of the ceramics. Song et al [17] synthesized SrWO 4 −2 wt.% LiF ceramic at 850 • C by the traditional solid phase reaction method with excellent microwave dielectric properties of ε r = 9.03 and Q × f = 47,830 GHz. Hao et al [18] prepared Li 2 TiO 3 −2.5 wt.% LiF ceramic with excellent microwave dielectric properties of ε r = 24.01, Q × f = 75,500 GHz, and τ f = −36.2 ppm/ • C at 950 • C and exhibited good compatibility with Ag.…”

Section: Introductionmentioning

confidence: 99%

Effects of LiF-Addition on Sintering Behavior and Dielectric Response of LaPO4 Ceramics at Microwave and Terahertz Frequency for LTCC Applications

Wang

Zhang

et al. 2023

Crystals

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This paper reports on the successful preparation of LaPO4-x wt.% LiF (x = 0–5) ceramics using the traditional solid-state reaction method. The crystal structures, sintering behaviors, and dielectric response at microwave and terahertz frequencies were investigated. XRD results indicate that all the diffraction peaks were attributed to LaPO4, and no secondary phase was observed. Rietveld refinement was conducted to analyze the variation of the crystal structure of LaPO4-x wt.% LiF. SEM indicates that the addition of LiF significantly decreased the grain size while increasing the apparent density of the ceramics. When x = 3, the optimum microwave dielectric properties εr = 10.03, Q × f = 81,467 GHz, and τf = −43.79 ppm/°C were achieved in LaPO4-3 wt.% LiF ceramic at 750 °C. The infrared reflectance spectrum and terahertz time-domain spectroscopy were analyzed and compared with the dielectric properties measured at microwave frequency to investigate the inherent dielectric response. The findings indicate that the dielectric constant attributed to ionic displacement polarization and oxygen vacancy is an essential factor affecting dielectric loss. Moreover, it is worth noting that the LaPO4-3 wt.% LiF ceramic demonstrates excellent compatibility with silver powders, suggesting its immense potential as a dielectric material in LTCC applications.

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Section: Introductionmentioning

confidence: 99%