A new microwave dielectric ceramic for LTCC applications

作者：Zhou, Huanfu^*; Chen, Xiuli; Fang, Liang; Hu, Changzheng; Wang, Hong

来源：Journal of Materials Science: Materials in Electronics , 2010, 21(8): 849-853.

DOI：10.1007/s10854-009-0006-1

• TEMPERATURE
• PHASE

A new low-sintering temperature microwave dielectric ceramic was found and investigated in the Li2O-Nb2O5-TiO2 (Li2O:Nb2O5:TiO2 = 5.7:1:14.7, by mole, abbreviated as LNT) system. This new microwave dielectric ceramic shows a relatively high permittivity (47), high Q x f values up to 17,800 GHz, and low temperature coefficients (57 ppm/A degrees C), which were obtained via sintering at 1,125 A degrees C. With the low-level doping of B2O3-CuO (BCu) (below 2 wt%), the sintering temperature of the LNT ceramic could be effectively reduced to 900 A degrees C. The addition of BCu does not induce apparent degradation in the microwave properties but lowers the tau (f) value. Typically, the 2.0 wt% BCu-doped ceramics sintered at 900 A degrees C have better microwave dielectric properties of epsilon(r) = 48.7, Q x f = 16,350 GHz, tau (f) = 32 ppm/A degrees C, which suggest that the ceramics could be applied in multilayer microwave devices requiring low sintering temperatures.

• 出版日期2010-8
• 单位桂林理工大学; 西安交通大学