Low temperature sintering behaviors, microstructures, and microwave dielectric properties of 11Li 2 O-3Nb 2 O 5 -12TiO 2 (LNT) ceramics with Li 2 O-B 2 O 3 -SiO 2 (LBS) glass additions were investigated. The XRD patterns reveal two phases, the ''M-phase'' and ''ss-phase'' Li 2 TiO 3 solid solution phases. The results suggest that small amount of LBS glass could effectively decrease the sintering temperature of LNT ceramic from 1100 to 900°C without reducing its microwave dielectric properties. However, decrease in microwave dielectric properties of LNT ceramic occurred when excess LBS glass added. Typically, LNT ceramics with 0.5 wt.% LBS glass possessed excellent microwave dielectric properties: e r = 47.94, Q 9 f = 9290 GHz (f = 4.67 GHz), and s f = 49.63 ppm/°C were obtained when sintered at 900°C.