Low temperature sintering of B2O3/LiNO3 added BaMg1/3Ta2/3O3 ceramics

The lowering of the sintering temperature of BaMg1/3Ta2/3O3 (BMT) ceramic is investigated using sintering aids. First is considered the addition of B2O3 and it is shown that such addition allows to sinter BMT material at around 1100 °C, whereas the usual sintering temperature is higher than 1500 °C in air atmosphere. Sinterability of B2O3 added BMT material in reductive atmosphere (RA) is also discussed. To enhance the sintering temperature lowering, the combination of LiNO3 and B2O3 is secondly investigated. Using both sintering aids with appropriate amount, it is shown that BMT material can be sintered at 1050 °C in a reductive atmosphere as well as in air atmosphere while maintaining dielectric properties (ε=24, |τε|<50 ppm/°C and Q>1000). These results are promising for the manufacturing of base metal electrodes (BME)–multilayers capacitor (MLCC).