ZnBO-doped (Ba, Sr)TiO 3 ceramics were investigated for low-temperature co-fired ceramics (LTCCs) applications. Until now, B 2 O 3 and Li 2 CO 3 dopants have been commonly employed as the low-temperature sintering aids. In this paper, we suggest ZnBO as an alternative dopant to the B 2 O 3 and Li 2 CO 3 . To reduce the sintering temperature of (Ba, Sr)TiO 3 , we have added 1-5 wt.% of ZnBO to (Ba, Sr)TiO 3 . ZnBO-doped (Ba, Sr)TiO 3 ceramics were respectively sintered from 750 to 1350 โข C by 50 โข C to confirm the sintering temperature with different dopant contents. By adding 5 wt.% of ZnBO to the (Ba, Sr)TiO 3 ceramics, the sintering temperature of (Ba, Sr)TiO 3 ceramics can be reduced to 1100 โข C. From the XRD analysis, ZnBO-doped (Ba, Sr)TiO 3 has no pyro phase. By adding ZnBO dopants to (Ba, Sr)TiO 3 ceramics, both of relative dielectric permittivity and loss tangent were decreased. From the frequency dispersion of dielectric properties, the relative dielectric permittivity and loss tangent of 5 wt.% ZnBO-doped (Ba, Sr)TiO 3 were 1180 and 3.3 ร 10 -3 , while those of BST were 1585 and 4.8 ร 10 -3 , respectively.