| 摘要 |
PURPOSE: To obtain a piezoelectric resonator having small variation in piezoelectricity and resonant frequency in a humidified atmosphere and excellent in thermal shock resistance. CONSTITUTION: A silver electrode 2 is formed on a piezoelectric ceramic 1 obtained by polarizing a sintered material of a piezoelectric ceramic composition comprising a main component expressed by Pb(Zn1/3 Nb2/3 )XTiYZrZO3 (X=0.01-0.50, Y=0.285-0.75, Z=0.125-0.680; X+Y+Z=1) added with 0.1-10.0wt.% of a compound of Pb(Me1/2 te1/2 )O3 (Me is at least one kind of metal selected from the group consisting of Mn, Co, Ni and Cu), annealing at 0.4-0.8 times of Curie temperature for >=1hr and holding at a normal temperature for >=48hr and polishing. |
