Patent ID: 6713123
Filing Date: 2004-03-30
Classification: H01L

Abstract:
A method for producing a piezoelectric element comprising the steps of:superposing a piezoelectric material containing a Pb(Mg, Ni)1/3Nb2/3O3â€”PbZrO3â€”PbTiO3 ternary system solid solution composition represented by the following general formula (1) as a main component on a ceramic substrate or on an electrode formed on the ceramic substrate, and subjecting the superposed piezoelectric material to a thermal treatment in an atmosphere where 0.03-0.5 mg/cm3 (NiO conversion amount per unit volume of a space in a container) of a atmosphere-controlling material having the same composition as the piezoelectric material coexists Pbx{(Mg1âˆ’yNiy)1/3Nb2/3}bTicZrdO3â€ƒâ€ƒ(1) wherein 0.95&lE;x&lE;1.05; 0.05&lE;y&lE;0.20; 0.90&lE;a&lE;1.10; b, c and d are decimals falling in a range surrounded by (b,c,d)=(0.550, 0.425, 0.025), (0.550, 0.325, 0.125), (0.375, 0.325, 0.300), (0.100, 0.425, 0.475), (0.100, 0.475, 0.425) and (0.375, 0.425, 0.200), in the coordinates with coordinate axes of said b, c and d, and b+c+d=1.000.