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Temperature stable K0.5 (Nd1- x Bix )0.5 MoO4 microwave dielectrics ceramics with ultra-low sintering temperature
Journal of the American Ceramic Society ( IF 3.5 ) Pub Date : 2017-12-26 , DOI: 10.1111/jace.15388
Li-Xia Pang 1, 2 , Di Zhou 2, 3 , Da-Wei Wang 2 , Jin-Xiong Zhao 4 , Wei-Guo Liu 1 , Zhen-Xing Yue 5 , Ian M. Reaney 2
Affiliation  

K 0.5 (Nd 1-x Bi x ) 0.5 MoO 4 (0.2 ≤ x ≤ 0.7) ceramics were prepared via the solid-state reaction method. All ceramics densified below 720°C with a uniform microstructure. As x increased from 0.2 to 0.7, relative permittivity (e(open) r ) increased from 13.6 to 26.2 commensurate with an increase in temperature coefficient of resonant frequency (TCF) from - 31 ppm/°C to + 60 ppm/°C and a decrease in Qf value (Q = quality factor; f = resonant frequency) from 23 400 to 8620 GHz. Optimum TCF was obtained for x = 0.3 (-15 ppm/°C) and 0.4 (+4 ppm/°C) sintered at 660 and 620°C with e(open) r ~15.4, Q f ~19 650 GHz, and e(open) r ~17.3, Q f ~13 050 GHz, respectively. Ceramics in this novel solid solution are a candidate for ultra low temperature co-fired ceramic (ULTCC) technology.

中文翻译:

温度稳定的 K0.5 (Nd1- x Bix )0.5 MoO4 微波介电陶瓷,具有超低烧结温度

通过固相反应法制备了K 0.5 (Nd 1-x Bi x ) 0.5 MoO 4 (0.2 ≤ x ≤ 0.7)陶瓷。所有陶瓷在 720°C 以下致密,具有均匀的微观结构。随着 x 从 0.2 增加到 0.7,相对介电常数 (e(open) r ) 从 13.6 增加到 26.2,与谐振频率温度系数 (TCF) 从 - 31 ppm/°C 增加到 + 60 ppm/°C 相称,并且Qf 值(Q = 品质因数;f = 谐振频率)从 23 400 GHz 减少到 8620 GHz。在 660 和 620°C 下烧结时 x = 0.3 (-15 ppm/°C) 和 0.4 (+4 ppm/°C) 获得最佳 TCF,e(open) r ~15.4,Q f ~19 650 GHz,和e(open) r ~17.3, Q f ~13 050 GHz,分别。这种新型固溶体中的陶瓷是超低温共烧陶瓷 (ULTCC) 技术的候选材料。
更新日期:2017-12-26
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