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The effects of ZnO-B2O3 (ZB2) on the sintering behavior and microwave dielectric properties of (Ca0.254Li0.19Sm0.14)TiO3 ceramics were investigated.The densities of the specimens reached the maximum value by adding 3 wt.% ZB2 and then decreased. The sintering temperature of the specimens was lowered from 1300 to 1100 ℃ without degradation of the microwave dielectric properties. The (Ca0.254Li0.19Sm0.14)-TiO3 + 3 wt.% ZB2 sintered at 1100 ℃ for 3 h showed good microwave dielectric properties, ε r = 108.2, Qf = 6545 GHz, and τ f = 6.5 ppm/℃,respectively, indicating that ZB2 was an effective sintering aid to improve the densification and microwave dielectric properties of (Ca0.254Li0.19Sm0.14)TiO3 ceramics.