Impacts of P-site non-stoichiometry on the structure and properties of BaZnP2O7 ceramics

Abstract

In this work, a series of P5+-enriched BaZnP2+xO7 ceramics were synthesized using the solid-state method at temperatures ranging from 825°C to 925°C. All ceramics exhibited a single triclinic phase. A suitable excess of P5+ promoted grain growth and densification, which also affected εr and Q×f. Subsequently, the relationship between total lattice energy and Q×f was explored, as well as the connection between total bond energy and τf. At 850°C, the BaZnP2.01O7 ceramics achieved a relative density of 97.7 % and demonstrated optimal properties: εr∼8.78, Q×f∼149,008 GHz, τf∼-28.92 ppm/°C. These ceramics present an outstanding combination of low εr, high Q×f and low sintering temperature, indicating their potential for application in Low-Temperature Co-fired Ceramics (LTCC) technology.