Title :
Piezoelectric generator using a LiNbO3 plate with an inverted domain
Author :
Funasaka, Tsukasa ; Furuhata, Makoto ; Hashimoto, Yasuharu ; Nakamura, Kiyoshi
Author_Institution :
Seiko Epson Corp., Nagano, Japan
Abstract :
Piezoelectric generator using an impact hammer can achieve a high efficiency by using the vibration of a piezoelectric plate. To achieve high efficiency it is necessary for the piezoelectric plate to have a high electro-mechanical coupling factor k and high Q. Therefore, in this study the generator using a thin plate of 140° rotated Y-cut LiNbO 3 with an inverted domain is proposed to achieve for a high efficiency. The efficiency of the piezoelectric generator is 78% for this new LiNbO3 generator and 65% for a conventional PZT generator. The total efficiency including the impact hammer is 55%. A multilayer LiNbO3 element bonded with glue is tested. The efficiency of piezoelectric generator is 70%. It is confirmed that these new generators are effective
Keywords :
electric generators; lithium compounds; piezoelectric devices; 55 percent; 70 percent; LiNbO3; LiNbO3 plate; Q-factor; efficiency; electromechanical coupling factor; impact hammer; inverted domain; multilayer element; piezoelectric generator; vibration; Bonding; Contacts; Lithium niobate; Nonhomogeneous media; Q factor; Resonance; Resonant frequency; Solar power generation; Testing; Vibrations;
Conference_Titel :
Ultrasonics Symposium, 1998. Proceedings., 1998 IEEE
Conference_Location :
Sendai
Print_ISBN :
0-7803-4095-7
DOI :
10.1109/ULTSYM.1998.762301
