Dielectric properties of (Ca,Sr)(Zr,Ti)O3 ceramics sintered in a reducing atmosphere with Li-B-Si-Ca-Mn glass addition

It is critical to find an appropriate sintering aid to reduce the sintering temperature of the temperature compensated (Ca,Sr)(Zr,Ti)O-3 (CSZT) ceramics while manufacturing multilayer ceramic capacitors (MLCCs) with copper electrodes. The effects of the addition of lithium borosilicate glass on the microstructure and dielectric properties of (Ca0.7Sr0.3) (Zr0.97Ti0.03)O-3 sintered in a reducing atmosphere have been reported. However, the relationships between the defect chemistry and the dielectric properties of Li-B-Si based glass added to CSZT ceramics have not been clarified. This study investigated the Li-B-Si-Ca-Mn (LBSCM) glass addition effects on the dielectric relaxation and AC impedance of sintered CSZT ceramics sintered in a reducing atmosphere based on the defect chemistry. It was observed that the dielectric relaxation peaks and AC impedance are intimately related to the defect associates V-o(..) - Li '(zr). The CSZT ceramics added with LBSCM glass can be densified at temperatures below 1000 degrees C and have lower dielectric losses, making them a promising choice for use as a dielectric ceramic in copper electrodes MLCCs.

Automated summary

This study investigates the effects of adding Li-B-Si-Ca-Mn (LBSCM) glass on the dielectric relaxation and AC impedance of sintered CSZT ceramics in a reducing atmosphere. It is found that the CSZT ceramics added with LBSCM glass can be densified at low temperatures with lower dielectric losses.