Title :
Development of piezoelectric and relaxor ceramics for sensor materials
Author :
Singh, A. Pallavi ; Kumar, B. Ravish
Author_Institution :
Metall. & Mater. Sci. Eng, Visvesvaraya Nat. Inst. of Technol., Nagpur, India
Abstract :
In this paper, piezoelectric and relaxor ceramics are the basic materials that are used in designing sensors. The project concentrates on the study and characterization of ceramic materials on the basis of d33, g33 and dielectric constant values. PZT (Pb (Zr0.55Ti0.45)O3), which belongs to the oxygen octahedral group, exhibits perovskite structure. PZT crystallites are centra-symmetric cubic (isotropic) before poling and after poling, it exhibits tetragonal symmetry (anisotropic structure) below the Curie temperature(Tm). Above this temperature it loses the piezoelectric property. PZT ceramics are almost always used with a dopant or a modifier. Additive used in present study is La3+. Composition of PLZT used for our study is [Pb0.95La0.05 (Zr0.58Ti0.42)O3].
Keywords :
crystal structure; crystal symmetry; lanthanum compounds; lead compounds; materials preparation; permittivity; piezoceramics; relaxor ferroelectrics; Curie temperature; [Pb0.95La0.05(Zr0.58Ti0.42)O3]; anisotropic structure; dielectric constant; octahedral group; perovskite structure; piezoelectric ceramics; relaxor ceramics; sensor materials; tetragonal symmetry; Additives; Anisotropic magnetoresistance; Ceramics; Crystallization; Dielectric constant; Dielectric materials; Piezoelectric materials; Sensor phenomena and characterization; Temperature; Zirconium;
Conference_Titel :
Internet, 2009. AH-ICI 2009. First Asian Himalayas International Conference on
Conference_Location :
Kathmandu
Print_ISBN :
978-1-4244-4569-1
Electronic_ISBN :
978-1-4244-4570-7
DOI :
10.1109/AHICI.2009.5340271
