Dielectric properties of (1-x)Na_0.5Bi_0.5TiO₃-xBa_0.66Mg_0.04Sr_0.3Sn_0.1Ti_0.9O₃ composite ceramics

ABSTRACT

The synthesis of (1-x)Na_0.5Bi_0.5TiO₃-xBa_0.66Mg_0.04Sr_0.3Sn_0.1Ti_0.9O₃ by the wet solid-phase method was successfully investigated. The microstructure, dielectric properties, and temperature stability of the obtained ceramics were investigated in detail. The size of the grains was determined by scanning electron microscopy. It was determined that the addition of Na_0.5Bi_0.5TiO₃ could enhance the dielectric constant. When the NBT amount is 0.4 mol%, the dielectric loss of capacitance is below 0.11 and the dielectric constant of the composites is about 1720. The temperature coefficient of capacity varied from −12.24% to 4.79% at the temperature range between −55°C and 200°C. The temperature-capacitance characteristics meet EIA X9R specifications.

KEYWORDS:

• Dielectric properties
• temperature stability
• Na_0.5Bi_0.5TiO₃-BaTiO₃

Additional information

Funding

This work is funded by the National Natural Science Foundation of China (Grant No.51302061), Natural Science Foundation of Hebei province (Grant No. E2014201076), Post-graduate's Innovation Fund Project of Hebei University (Grant No. X2016084).