Crystal Strucrure and Physical Properties of New Ferroelectric BaTi25 in Ba-Ti-O System
|
Accession number;06A0382471
|
| Title;Crystal Strucrure and Physical Properties of New Ferroelectric BaTi25 in Ba-Ti-O System |
| Author;
AKISHIGE YUKIKUNI
(Shimane Univ., Fac. of Educ.)
SHIGEMATSU HIROTAKE
(Shimane Univ., Fac. of Educ.)
KOJIMA SEIJI
(Inst. Materials Sci., Univ. Tsukuba, JPN)
|
Journal Title;Journal of the Crystallographic Society of Japan
|
Journal Code:G0232A
|
ISSN:0369-4585
|
|
VOL.48;NO.2;PAGE.115-120(2006)
|
| Figure&Table&Reference;FIG.9, TBL.1, REF.20 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;Recently, we have found a new ferroelectric barium dititanate, BaTi2O5, with a spontaneous polarization of 7.MU.C/cm'2' at room temperature. The crystals, grown by a cooling method, show a ferroelectric phase transition at the Curie temperature TC of 700-750K, and the space group changes from monoclinic C2/m to monoclinic C2 on cooling. The dielectric constant .EPSILON.b' along the b-axis measured at 1MHz reaches very large values of about 30000 at TC, while the dielectric loss tan.DELTA. remains small at values below 0.1. Thus, BaTi2O5 is very promising for use in dielectric and piezoelectric devices operating at high temperatures. In this review, we would like to describe the synthetic method, the crystal structure and the physical property on the barium dititanate. (author abst.) |
|
|
|
Related Articles;
|
|
