In order to reduce the sintering temperature of ceramics, the effects of binary composite sintering aids, Li₂CO₃ and CuO, on the sintering temperature and properties of 0.7BiFeO₃-0.3BaTiO₃-0.0035MnCO₃ + 0.002Li₂CO₃ + xCuO (BF-BT-LC + xCuO) ceramics were studied by traditional solid-state sintering. The results show that the sintering liquid phase can effectively promote the sintering of BF-BT-LC + xCuO ceramics by adding a certain amount of Li₂CO₃ and changing the amount of CuO. The samples sintered at 930°C/2 h with 0.4 mol.% CuO get a piezoelectric constant d₃₃ = 168 pC/N, an electromechanical coupling coefficient k_p = 0.302, and a mechanical quality factor Q_m = 31.207. The addition of CuO was conducive to obtaining stable BF-BT-LC + xCuO piezoelectric ceramics. We conclude that the composite sintering aids, Li₂CO₃ and CuO, can effectively promote the sintering of BF-BT-LC + xCuO, which is beneficial to obtain BF-BT-LC + xCuO ceramics with a wide sintering temperature range and stable properties.

为了降低陶瓷的烧结温度，二元复合烧结助剂Li ₂ CO ₃和CuO对0.7BiFeO ₃ -0.3BaTiO ₃ -0.0035MnCO ₃  + 0.002Li ₂ CO ₃  + 的烧结温度和性能的影响。通过传统的固态烧结研究了x CuO（BF-BT-LC +  x CuO）陶瓷。结果表明，烧结液相可以通过加入一定量的Li ₂ CO ₃来有效地促进BF-BT-LC + x CuO陶瓷的烧结。 并改变CuO的量 在930°C / 2 h下用0.4 mol。％CuO烧结的样品的压电常数d ₃₃  = 168 pC / N，机电耦合系数k _p  = 0.302，机械品质因数Q _m  = 31.207。加入的CuO有利于获得稳定的BF-BT-LC +  X CuO的压电陶瓷。结论：Li ₂ CO ₃和CuO复合烧结助剂可以有效地促进BF-BT-LC + x CuO的烧结 ，有利于获得烧结温度范围较宽的BF-BT-LC +  x CuO陶瓷。和稳定的属性。