Influence of technological processing on physical properties of the ferroelectric Ba_0.995La_0.005Ti_0.99875O₃ ceramics

ABSTRACT

The lanthanum barium titanate (BLT) ceramics with the ABO₃ perovskite-type structure has been investigated, and the optimum technology for preparation of BLT ceramics exhibiting high density and high dielectric constant has been developed. By means of conventional technology and sol-gel method ferroelectric ceramic Ba_1-xLa_xTi_1-x/4O₃, for x = 0.005, was obtained. After a solid-phase synthesis, the obtained powders were sintered using one of three ways: free sintering, hot pressing followed by free sintering, and free sintering followed by hot pressing. The ceramic samples were characterized in terms of their microstructure and dielectric properties.

KEYWORDS:

• BLT
• electroceramics
• sol-gel
• dielectric properties

Acknowledgments

The present research has been supported by National Research and Development Centre (NCBR) and National Science Centre (NCN) in years 2015–2018, as a research project No TANGO1/269499/NCBR/2015.