Title :
Piezoelectric materials in the 21st century
Author :
Yamashita, Yohachi
Author_Institution :
Lab. of Power Supply Mater. & Devices, Toshiba Corp., Kawasaki, Japan
Abstract :
High-quality piezoelectric single crystals, such as Pb(Zn1/3 Nb2/3)O3-PbTiO3 (PZNT) and Pb(Mg 1/3Nb2/3)O3-PbTiO3 (PMNT), have been investigated and, since their piezoelectric properties are greatly superior to those of PZT ceramics, they have been used for certain applications since the late 1990s. However, these materials have still some shortcomings, notably low Curie temperature Tc<180°C and slower growth rate, which prevent them from replacing PZT ceramics in major application field. In this paper, some possible high Tc>200°C single crystals are introduced. Single crystals of Pb(In 1/2Nb1/2)O3-PbTiO3 (PINT) binary system and Pb(Mg1/3Nb2/3)O3-Pb(Sc1/2Nb 1/2)O3-PbTiO3 (PSMNT) ternary system have been synthesized and their electrical properties are reported. In addition, a novel guiding principle for discovering excellent piezoelectric materials, namely the presence of low-molecular-mass B-site ions which can enter the lead-perovskite structure
Keywords :
ferroelectric Curie temperature; lead compounds; piezoelectric materials; 200 C; Curie temperature; PINT; PMNT; PSMNT; PZNT; PbInO3NbO3-PbTiO3; PbMgO3NbO3-PbScO3NbO3 -PbTiO3; PbMgO3NbO3-PbTiO3; PbZnO3NbO3-PbTiO3; electrical properties; growth rate; perovskite structure; piezoelectric single crystal; Ceramics; Crystalline materials; Crystals; Laboratories; Lead; Piezoelectric devices; Piezoelectric materials; Power supplies; Temperature; Titanium compounds;
Conference_Titel :
Applications of Ferroelectrics, 2000. ISAF 2000. Proceedings of the 2000 12th IEEE International Symposium on
Conference_Location :
Honolulu, HI
Print_ISBN :
0-7803-5940-2
DOI :
10.1109/ISAF.2000.941529
