In this work, a series of BaZnP2-xWxO7+x/2 (0.005 ≤ x ≤ 0.04) ceramics were synthesized within the temperature range of 850-925°C, any of which exhibited a single triclinic phase. The introduction of an optimal amount of non-equivalent W6+ ions promoted grain growth and densification, which also influenced the and . The analysis revealed that the lattice energy and bond energy of the P|W-O bond contributed the most to and , respectively. Subsequently, the relationships between and , as well as between and , were thoroughly investigated. At 900°C, the relative density of BaZnP1.99W0.01O7.005 ceramics reached 97.8%, exhibiting optimal properties: ∼9.01, ∼104,959 GHz, and ∼-17.73 ppm/°C. Compared to pure BaZnP2O7 ceramics, the value improved by 86.9%, while the value demonstrated a 38.2% enhancement.