| 摘要 |
The soft piezoelectric ceramic composition is a soft piezoelectric ceramic composition sinterable at a reduced temperature with high piezoelectric parameters and is used in a piezoelectric device. Preferably the soft piezoelectric ceramic composition comprises:wherein m,n,x,y,a and b are molar ratio, p is wt % and are in ranges, repectively,The soft piezoelectric ceramic composition has high piezoelectric constants and electromechanical coupling coefficients and can be sintered at a reduced temperature below 1000° C. Further, the soft piezoelectric ceramic materials can be co-fired with pure Ag electrode below 960° C. Based on the piezoelectric ceramic compositions provided, multi-layer piezoelectric actuators are built with pure Ag internal electrode, saving a cost of electrode as much as 90% compared to Ag-Pd (30%) internal electrode.
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