Low-temperature sintering and phase transition of zinc titanate ceramics with V2O5 and B2O3 addition

V2O5 and B2O3-doped (abbreviated to V–B) zinc titanate ceramics were prepared by a conventional mixed-oxide method combined with a chemical processing. Fine particle powders were prepared by chemical processing to activate the formation of ZnTiO3 and to improve the sinterability. The effects of V–B addition on the low-temperature sintering behavior, the phase-structure and dielectric properties of ceramics were investigated, and phase transition mechanism and low-temperature sintering mechanism were discussed. The results show that the densification temperature of zinc titanate ceramics could be reduced from 1100 to 875 °C by V–B addition. The complete phase transition temperature of hexagonal ZnTiO3 to cubic Zn2TiO4 was lowered from 945 to 930 °C by substituting V5+ for Ti4+. Exaggerated grain growth was found in high-V content samples and disappeared with B2O3 content increasing. At the same time, the grains became uniform. The dielectric properties of V–B additions-doped zinc titanate ceramics were measured at different frequencies. The results showed the decreasing tendency with the increasing measuring frequencies for both the dielectric constants and the loss tangents, and there existed the best dielectric properties for 3VB-doped ceramics.