LiCa3ZnV3O12: A novel low-firing, high Q microwave dielectric ceramic

A novel low-firing microwave dielectric ceramic LiCa3ZnV3O12 with low dielectric loss was synthesized by the solid-state reaction method. The phase composition, microstructure, and sintering behavior were investigated. The LiCa3ZnV3O12 ceramic could be well densified at around 900 degrees C and exhibited favorable microwave dielectric properties with a low relative permittivity (epsilon(r)) of 11.5, a fairly high quality factor (Q(u)f) of 81,100 GHz, and a negative temperature coefficient of resonant fiequency (tau(f)) approximately -72 ppm/degrees C. The LiCa3ZnV3O12 ceramic can be co-fired with Ag electrode, which makes it a promising ceramic for low temperature co-fired ceramic (LTCC) applications as substrate. Furthermore, 0.8LiCa(3)ZnV(3)O(12)-0.2CaTiO(3) ceramic sintered at 925 degrees C for 4 h exhibited improved microwave dielectric properties of epsilon(r)=13.2, Q(u)f=59,600 GHz, and tau(f)=1.3 ppm/degrees C. (C) 2013 Elsevier Ltd and Techna Group S.r.l. All rights reserved.