Low-fire Processing of Microwave BaTi4O9 Dielectric with BaO–Li2O–B2O3–SiO2–ZnO Glass

Abstract

The effects of BaO–Li2O–B2O3–SiO2–ZnO (BLBSZ) glass addition on the densification and dielectric properties of BaTi4O9 (BT4) have been investigated. The microwave BT4 ceramics with 5–10 vol % BLBSZ glass can be densified at 900–925 °C, which is 400 °C lower than that required for pure BT4. The resulting microwave BT4+BLBSZ ceramics have a dielectric constant of 33–34, and the product (Q·fr) of the quality factor (Q) and resonant frequency ( fr) of 14,000–20,000 GHz at 6.6 GHz.