海水-富盐空气对BaTiO3 及Ni-BaTiO3 MLCC介电性能的影响.

BaTi()s ceramic and 82 nF Ni-BaTi()s MLCC were placed in seawater and salt-rich air. Impedance analyzer, SEM and EDS were used to investigate the properties and corrosion mechanism of BaTi()s ceramic and 82 nF MI'CC after treatment for 0 h, 24 h, 48 h and 72 h. The results show that when BaTi()s ceramic is placed in seawater, the relative dielectric constant and dielectric loss of BaTi()s ceramic increase at different low frequencies (1 ()-1 0s Hz), and the increase amplitude is huge. Obvious protective film is generated on the surface of the ceramic in 24 h. The variation range of dielectric properties within 72 h is small, and there is no obvious protective film on the surface, but there are certain corrosion traces. The high frequency (1 05-l ()b Hz) capacitance value and dielectric loss of 82 nF MLC'C placed in seawater and salt-rich air for 72 h changes significantly, which is caused by salt immersion in the internal crystallization, but there is also no protective film on its surface, which may be related to the oxide coating on the capacitor surface. [ABSTRACT FROM AUTHOR]