Adjustable microwave dielectric properties of ZnO-TiO2-ZrO2-Nb2O5 composite ceramics via controlling the raw ZrO2 content and sintering temperature

作者：Sun, Wendong; Zhou, Huanfu^*; Tan, Xianghu; Wang, Kangguo; Ruan, Hong; Zhang, Hailin; Liu, Xiaobin^*; Chen, Xiuli

来源：Journal of Materials Science: Materials in Electronics , 2018, 29(14): 12055-12060.

DOI：10.1007/s10854-018-9311-x

• CRYSTAL-STRUCTURE
• MG
• BEHAVIOR
• ZN
• TA
• NB

A series of 2.5ZnO-(5-x)TiO2-xZrO(2)-2.5Nb(2)O(5) (abbreviated as ZTZN, 0.2 <= x <= 0.4) composite ceramics were prepared by a solid state reaction method. The phase composition and microwave dielectric properties of the ceramics were investigated. X-ray diffraction patterns displayed the coexistence of ZnTiNb2O8 and Zn0.17Nb0.33Ti0.5O2 phases. With increasing the sintering temperature, the bulk density (rho), permittivity (epsilon (r) ) and temperature coefficient of resonator frequency (tau (f) ) increased. With increasing the ZrO2 content, the rho firstly increased and then decreased, Q x f value increased, epsilon (r) and tau (f) value decreased. Importantly, the tau (f) value of ZTZN ceramics (0.2 <= x <= 0.4) could be adjusted to near-zero. The 2.5ZnO-4.7TiO(2)-0.3ZrO(2)-2.5Nb(2)O(5) ceramics sintered at 1075 A degrees C exhibited the best comprehensive performances of Q x f = 30,155 GHz, epsilon (r) = 44 and tau (f) = 0.89 ppm/A degrees C, indicating that they are candidates for microwave devices.

• 出版日期2018-7
• 单位桂林理工大学