A Temperature-Insensitive Ba3.75Nd9.5Ti17.5(Cr0.5Nb0.5)(0.5)O-54 Microwave Dielectric Ceramic by Bi3+ Substitution

作者：Chen, Hetuo; Tang, Bin^*; Guo, Xia; Wei, Meng; Si, Feng; Yuan, Ying; Zhang, Shuren

来源：Journal of Electronic Materials, 2017, 46(2): 1230-1234.

DOI：10.1007/s11664-016-5098-9

• Electroceramics
• microstructure
• x-ray diffraction

In this study, effects of Bi3+ substitution upon microwave dielectric properties of the (Cr0.5Nb0.5)(4+) replaced Ba3.75Nd9.5Ti18O54 (0 <= x <= 0.2) ceramic have been reported. The x-ray diffraction (XRD) result shows a single phase for all compositions with peak position fluctuation. Within the whole x range, while the quality factor (Q) is degraded, the dielectric constant (epsilon (r)) can be improved by as high as 32% and the temperature coefficient of resonant frequency (tau (f)) is tailored from around +40 ppm/A degrees C to the vicinity of zero. Considering practical requirements, we can obtain a series of temperature-insensitive ceramics (tau (f) similar to 0 ppm/A degrees C) with relative permittivity about 95 and Qf (defined as Q times the resonant frequency f) higher than 6000 GHz. They have the potential of being utilized in wireless microwave communication applications.

• 出版日期2017-2
• 单位电子薄膜与集成器件国家重点实验室; 电子科技大学