Li2CO3烧结助剂对(Ba0.85Ca0.15)(Zr0.1Ti0.9)O3陶瓷介电、铁电及储能性能的影响

The dielectric, ferroelectric and energy storage properties of (Ba 0.85 Ca 0.15 )(Zr 0.1 Ti 0.9 )O 3 (BCZT)-x wt% Li 2 CO 3 ceramics ( x = 0, 1, 2, 3 and 4) are studied. With x increasing to 2, the diffused phase transition gradually enhances because of the enhanced distortion of crystal structure. With further increasing x, the diffused phase transition gradually weakens due to the generated oxygen vacancies. A maximum ε m of 15,488 is achieved at x = 3 due to the bigger average grain size. Meanwhile, the optimal energy storage properties are found at BCZT-3 wt% Li 2 CO 3 ceramic. Compared with pure BCZT ceramic, the energy storage density of BCZT-3 wt% Li 2 CO 3 ceramic is improved from 71 mJ/cm 3 to 143 mJ/cm 3 and the energy storage efficiency increases from 56 to 69%. It makes BCZT-3 wt% Li 2 CO 3 ceramic more suitable to use as energy storage capacitors.