AsiaIPEX is a one-stop-shop for players in the IP industry, facilitating IP trade and connection to the IP world. Whether you are a patent owner interested in selling your IP, or a manufacturer looking to buy technologies to upgrade your operation, you will find the portal a useful resource.

Back to search results

Piezoelectric Ceremic Composition and the Method for Preparing the Same

Summary: The present invention provides a piezoelectric ceramic composition, especially a lead-free piezoelectric ceramic composition, with a suitable amount of CeO2 or CeO2-containing complex additives, which is represented by the following formula: (Na0.475K0.475Li0.05)(Nb1-xAx)O3+yCeO2+zBO2 wherein “A” represents Sb or Sb+Ta, “B” represents a tetravalent transition metal, 0≦x≦0.2, 0.2 wt %

Supplementary Information: Inventor: Wang, Xiaoxing | Kwok, Kin Wing | Chan, Helen Lai Wah | Choy, Siu Hong
Priority Number: US7494601B2
IPC Current: C04B0035495 | H01L0041187
US Class: 25206290R | 501134
Assignee Applicant: The Hong Kong Polytechnic University
Title: Piezoelectric ceramic composition and the method for preparing the same
Usefulness: Piezoelectric ceramic composition and the method for preparing the same
Summary: The composition is used as lead-free piezoelectric ceramic composition for use in piezoelectric actuators, sensors, filters and transducers. The piezoelectric ceramic composition is (Na 0.475 K 0.475 Li 0.05 )NbO 3 +(0.4, 0.6, 0.8) wt.% cerium oxide (CeO 2 ); (Na 0.475 K 0.475 Li 0.05 )(Nb 0.99 Sb 0.01 )O 3 +0.4 wt.% CeO 2 ; (Na 0.475 K 0.475 Li 0.05 )(Nb 0.97 Sb 0.03 )O 3 +(0.4, 0.8) wt.% CeO 2 ; (Na 0.475 K 0.475 Li 0.05 )(Nb 0.97 Sb 0.03 )O 3 +0.4 wt.% CeO 2 +0.4 wt.% manganese oxide (MnO 2 ); (Na 0.475 K 0.475 Li 0.05 )(Nb 0.97 Sb 0.03 )O 3 +0.6 wt.% CeO 2 +0.6 wt.% MnO 2 ; (Na 0.475 K 0.475 Li 0.05 )(Nb 0.97 Sb 0.03 )O 3 +0.4 wt.% CeO 2 +0.4 wt.% titanium oxide (TiO 2 ); (Na 0.475 K 0.475 Li 0.05 )(Nb 0.97 Sb 0.03 )O 3 +0.6 wt.% CeO 2 +0.6 wt.% TiO 2 ; (Na 0.475 K 0.475 Li 0.05 )(Nb 0.97 Sb 0.03 )O 3 +0.4 wt.% CeO 2 +0.4 wt.% zirconium oxide (ZrO 2 ); (Na 0.475 K 0.475 Li 0.05 )(Nb 0.97 Sb 0.03 )O 3 +0.6 wt.% CeO 2 +0.6 wt.% ZrO 2 ; (Na 0.475 K 0.475 Li 0.05 )(Nb 0.92 Ta 0.05 Sb 0.03 )O 3 +0.4 wt.% CeO 2 ; (Na 0.475 K 0.475 Li 0.05 )(Nb 0.92 Ta 0.05 Sb 0.03 )O 3 +0.4 wt.% CeO 2 +0.4 wt.% MnO 2 ; or (Na 0.475 K 0.475 Li 0.05 )(Nb 0.92 Ta 0.05 Sb 0.03 )O 3 +0.6 wt.% CeO 2 +0.6 wt.% MnO 2 (all claimed).
Novelty: Piezoelectric ceramic composition, e.g. for piezoelectric actuator, comprises specific amounts of sodium, potassium, lithium, niobium, antimony and/or tantalum, oxygen, cerium oxide, and tetravalent transition metal oxide

Industry: Chemical/Material

Sub Category: Chemical/Material Application

Others: KWOK Kin-wing
WANG Xiaoxing
CHAN-WONG Lai-wah Helen
CHOY Siu-hong

Country/Region: USA

For more information, please click Here