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。