可靠性物理银迁移对PMZNT基独石电容器电性能的作用机理.pdf

22 3 　　　　 V ol. 22 N o. 3 2000 6 P IEZOELECT RICS A COU STO OPT ICS une 2000 　　: 1004-2474( 2000) 03-0 154-03 PMZNT 左如忠, 李龙土, 桂治轮 ( , 100084) 　　　: PM N -PZN -PT ( PM ZNT )。 。 。: , , , 。, 。 , 。 : ; ; : T N 304 : A M echanism of Action of SilverM igration on E lectric Properties of PMN-PZN-PT BasedM onolithicMLCC ZUO R -zhong, LILong-t, GUI Zh i-l n (Dep t. of M eteria l S ci. E ng. , S tate K ey Lab. of N ew C eram ic and F ine P rocessin g, T singhua U n iversity, B eijing 100084, Ch in a) 　　Abstract: M echan ism of action of silver m igration in inner electrode on electric propertie s of PM ZN T based . - , M LCC w a s inve stig ated T hrough m icro dop ing silver salt in fluence of silver elem ent m igrating from inner electrode . in to ceram ic on M LCC du ring cofir ing w as d iscussed T he m icrostructure at the interface betw een electrode and ceram ic w as ob served v ia a scanning electron m icro scope. T he stud ies dem onstrate that the dielectr ic property of sin tered ceram ic pellets w as ch ang ed because of silver m ig ration, and th at the insulation resistance w a s decreased. Insu latio n resistiv ity and km ax w ere not smi p ly and m onoton ically chang ed w ith the con tent of silv er. D efect chem istry m ethod w a s used to exp lain the above re su lts. Relation sh ip of silv er m igration and m icro structu re w as also discussed. : ; ; Key words m ultilay er ceram ic capacitor cofire silver m igration 　 M LCC 1　前言