Study on properties of Ca2Zn4Ti15O36 ceramics with CaO-B2O3-SiO2 glass

The effects of CaO-B2O3-SiO2 (CBS) glass additions on the sintering temperatures and dielectric properties of Ca2Zn4Ti15O36 ceramics have been investigated using X-ray diffraction, Scanning electron microscopy. A small amount of CBS glass addition to Ca2Zn4Ti15O36 ceramics can greatly decrease the sintering temperature to about 975 A degrees C. It is revealed that the reduced sintering temperature is attributed to the formation of liquid phase. The major phases of the samples are Ca2Zn4Ti15O36 and rutile. The more glass added, the more rutile phase formed. The tau(f) values shift towards negative first and then toward positive with the increasing glass additions. The Ca2Zn4Ti15O36 ceramics with 4 wt% glass addition sintered 1,050 A degrees C for 2 h exhibit good microwave dielectric properties: Q center dot f values of 31,000 GHz and dielectric constant (epsilon (r) ) of 44.7.