Ba4MgTi11O27 microwave dielectric ceramic was investigated using X-ray diffraction, scanning electron microscopy and dielectric measurement. The pure Ba4MgTi11O27 ceramic shows a high sintering temperature (similar to 1275 degrees C) and good microwave dielectric properties as Q x f of 19,630 GHz, epsilon(r) of 36.1, tau(f) of 14.6 ppm/degrees C. It was found that the addition of BaCu(B2O5) (BCB) can effectively lower the sintering temperature from 1275 to 925 degrees C, and does not induce much degradation of the microwave dielectric properties. The BCB-doped Ba4MgTi11O27 ceramics can be compatible with Ag electrode, which makes it a promising ceramic for LTCC technology application. (C) 2010 Elsevier Ltd. All rights reserved.