Piezoelectric component and method for producing a piezoelectric component
View Patent ↗A piezoelectric component has at least one piezoelectric ceramic layer and at least one electrode adjacent the piezoelectric ceramic layer. The piezoelectric ceramic layer has a piezoelectric ceramic material of the general formula Pb 1-x-y-[(2a-b)/2]-p/2 V [(2a-b)/2-p/2] ″Cu p Ba x Sr y [(Ti z Zr 1-z ) 1-a- bW a RE b ]O 3 , where 0≦x≦0.035, 0≦y≦0.025, 0.42≦z≦0.5, 0.0045≦a≦0.009, 0.009≦b≦0.011, 2a>b, p≦2a−b, RE is a rare earth metal, and V″ is a Pb vacancy.
1. A piezoelectric component comprising:
a piezoelectric ceramic layer comprising a piezoelectric ceramic material of the general formula Pb 1-x-y-[(2a-b)/2]-p/2 V [(2a-b)/2-p/2] ″Cu p Ba x Sr y [(Ti z Zr 1-z ) 1-a-b W a RE b ]O 3 , where 0≦x≦0.035, 0≦y≦0.025, 0.42≦z≦0.5, 0.0045≦a≦0.009, 0.009≦b≦0.011, 2a>b, p≦2a−b, RE is a rare earth metal, and V″ is a Pb vacancy; and
an electrode adjacent the piezoelectric ceramic layer.
2. The component according to claim 1 , wherein RE comprises an element selected from the group consisting of Lu, Yb, Tm, Er, Y, Ho, and Dy.
3. The component according claim 1 , wherein the electrode comprises copper.
4. The component according to claim 3 , wherein the piezoelectric ceramic material is Pb 0.9451 V 0.00128 ″Cu 0.003 Ba 0.0295 Sr 0.0211 [Ti 0.467 Zr 0.516 W 0.00753 Yb 0.0095 ]O 3 .
5. A method of making a piezoelectric component, the method comprising:
forming a piezoelectric ceramic layer comprising a piezoelectric ceramic material of the general formula Pb 1-x-y-[(2a-b)/2]-p/2 V [(2a-b)/2-p/2] ″Cu p Ba x Sr y [(Ti z Zr 1-z ) 1-a-b W a RE b ]O 3 , where 0≦x≦0.035, 0≦y≦0.025, 0.42≦z≦0.5, 0.0045≦a≦0.009, 0.009≦b≦0.011, 2a>b, p≦2a−b, RE is a rare earth metal, and V″ is a Pb vacancy.
6. The method according to claim 5 , further comprising forming an electrode adjacent the piezoelectric ceramic layer.
7. The method according to claim 6 , wherein the electrode comprises copper.
8. The method according to claim 5 , wherein RE comprises an element selected from the group consisting of Lu, Yb, Tm, Er, Y, Ho, and Dy.
9. The method according to claim 8 , wherein the piezoelectric ceramic material is Pb 0.9451 V 0.00128 ″Cu 0.003 Ba 0.0295 Sr 0.0211 [Ti 0.467 Zr 0.516 W 0.00753 Yb 0.0095 ]O 3 .