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Sodium bismuth titanate based lead-free piezoelectric ceramic material having high dielectric property
The present invention discloses a sodium bismuth titanate based lead-free piezoelectric ceramic material having high dielectric property, and a preparation method thereof, wherein the chemical general formula is Na0.5BixTi4O1.5x+8.25, x is 4.48-4.52, and two pre-firing and one sintering are performed by using the conventional solid phase method so as to obtain the product. According to the present invention, the detected Curie temperature of the prepared ceramic sheet is 675 DEG C, the relative dielectric constant near the Curie temperature is more than or equal to 1200, preferably the relative dielectric constant is more than or equal to 1700, the dielectric loss is low, the activation energies of the three material of the prepared ceramic sheet are 1.15-1.77 eV through the electric mode coefficient calculation, and the impedance of the Z* impedance map detection material is high; and the resistance of the prepared ceramic sheet material is more than or equal to 5000 so as to show the good dielectric property of the material, and the dielectric property is substantially improved compared with the conventional Bi0.5Na0.5TiO3(BNT).
Sodium bismuth titanate based lead-free piezoelectric ceramic material having high dielectric property
The present invention discloses a sodium bismuth titanate based lead-free piezoelectric ceramic material having high dielectric property, and a preparation method thereof, wherein the chemical general formula is Na0.5BixTi4O1.5x+8.25, x is 4.48-4.52, and two pre-firing and one sintering are performed by using the conventional solid phase method so as to obtain the product. According to the present invention, the detected Curie temperature of the prepared ceramic sheet is 675 DEG C, the relative dielectric constant near the Curie temperature is more than or equal to 1200, preferably the relative dielectric constant is more than or equal to 1700, the dielectric loss is low, the activation energies of the three material of the prepared ceramic sheet are 1.15-1.77 eV through the electric mode coefficient calculation, and the impedance of the Z* impedance map detection material is high; and the resistance of the prepared ceramic sheet material is more than or equal to 5000 so as to show the good dielectric property of the material, and the dielectric property is substantially improved compared with the conventional Bi0.5Na0.5TiO3(BNT).
Sodium bismuth titanate based lead-free piezoelectric ceramic material having high dielectric property
CHEN YONG (author) / YANG HUAI (author) / YANG YAN (author) / LI ZHANG (author) / HUANG HANHUA (author)
2015-11-18
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
European Patent Office | 2017
| European Patent Office | 2023