Decisive role of MgO addition in the ultra-broad temperature stability of multicomponent BaTiO3-based ceramics

Synthesis and characterization of high performance CaZrO3-doped X8R BaTiO3-based dielectric ceramics

“…(1). In our multicomponent ϳ system, it is speculated that the migration of oxygen vacancies has a profound effect on the leakage conductivity, i.e., lowering the activation energy, as in our previous study [20], thus the dielectric loss continues to increase. Fig.…”

Temperature stability, structural evolution and dielectric properties of BaTiO3–Bi(Mg2/3Ta1/3)O3 perovskite ceramics

“…Nevertheless, BT ceramics have three phase transitions at about 125 o C, 0 o C, and -90 o C, leading to three dielectric anomalies, which restricts the applications of BT in the electronic information manufacturing industry [4]. To solve the above mentioned problem, a number of BaTiO 3 -based solid solutions [5][6][7][8][9][10][11][12][13][14] have been researched owing to their high relative permittivity and good temperature-stability, especially for the addition of Bibased [general formula-Bi(Me)O 3 ] perovskite materials to BaTiO 3 , such as BaTiO 3 -Bi(Mg 0.5 Zr 0.5 )O 3 [6,7], BaTiO 3 -Bi(Zn 0.5 Zr 0.5 )O 3 [15], BaTiO 3 -Bi(Li 1/3 Ti i2/3 )O 3 [16], BaTiO 3 -BiScO 3 [17,18], and BaTiO 3 -Bi(Mg 0.5 Ti 0.5 )O 3 [19,20]. These ceramics show a common phenomenon that the curves of dielectric constant as a function of temperature (ε-T) flatten gradually with increasing the Bi(Me)O 3 content, which is highly attractive for MLCC applications.…”

The role of Co in the BaTiO3–Na0.5Bi0.5TiO3 based X9R ceramics

“…Nowadays, to investigate a new core-shell system which can satisfy EIA-X9R specification ( À 55-200 1C, ΔC/ C r 7 15%) is in need because of the harsh working condition requirements in MLCCs applications [4]. One way to improve the ceiling working temperature of X7R system is to utilize BaTiO 3 -Na 0.5 Bi 0.5 TiO 3 (BT-NBT) system to acquire a high Curie temperature at about 150 o C [5].…”