Dielectric Anisotropy in Partially Grain-Oriented Bi2VO5.5 Ceramics

Autor:	K. V. R. Prasad, K. B. R. Varma
Jazyk:	angličtina
Rok vydání:	1995
Předmět:	Electrical engineering. Electronics. Nuclear engineering TK1-9971
Zdroj:	Active and Passive Electronic Components, Vol 18, Iss 3, Pp 137-144 (1995)
Druh dokumentu:	article
ISSN:	0882-7516 1563-5031
DOI:	10.1155/1995/85454
Popis:	Ceramics obtained from quenching melts of prereacted polycrystalline Bi2V5.5 exhibit grain orientation (~ 55%). Microstructural studies carried out using scanning electron microscopy (SEM) on subsequently annealed ceramics show ferroelectric domains. These post-annealed ceramics possess dielectric anisotropies of about 1:1.2 at 300 K and 1:4.3 in the vicinity of the Curie temperature (~ 730 K) between the directions parallel and perpendicular to the quenching direction. The dielectric constants of the samples, obtained by quenching the melts, are higher than that of the post-annealed ceramics. Electrically poled and thermally cycled samples of both as-quenched and post-annealed exhibit ferroelectric hysteresis loops at 300 K.
Databáze:	Directory of Open Access Journals
Externí odkaz:	https://doaj.org/article/f7f7e0eacb4f4af1babe522942d836a5 Zobrazit plný text záznamu Plný text View record in DOAJ