Premium
Processing and Properties of Strontium Bismuth Vanadate Niobate Ferroelectric Ceramics
Author(s) -
Wu Yun,
Nguyen Chau,
Seraji Seana,
Forbess Mike J.,
Limmer Steven J.,
Chou Tammy,
Cao Guozhong
Publication year - 2001
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.2001.tb01109.x
Subject(s) - materials science , vanadium , curie temperature , microstructure , dielectric , ferroelectricity , mineralogy , bismuth , analytical chemistry (journal) , ceramic , vanadate , strontium , dissipation factor , grain size , bismuth vanadate , sintering , perovskite (structure) , dielectric loss , metallurgy , crystallography , chemistry , condensed matter physics , biochemistry , physics , optoelectronics , organic chemistry , chromatography , photocatalysis , ferromagnetism , catalysis
The processing conditions, microstructure, and dielectric properties of strontium bismuth niobate vanadate ceramics, SrBi 2 (V x Nb 1− x ) 2 O 9 (SBVN, with 0 ≤ x ≤ 0.3), were systematically studied. A relative density of >90% was obtained for all the samples using a two‐step sintering process. XRD showed that a single phase with the layered perovskite structure of SrBi 2 Nb 2 O 9 (SBN) was formed with a vanadium content of up to 30 at.%. SEM revealed that the average grain size decreased gradually with an increase in vanadium content. The Curie point was found to gradually increase from ∼418°C for SBN to ∼459°C for SBVN with 30 at.% vanadium. Dielectric constants at room temperature and their respective Curie points were found to peak at a composition with 10–15 at.%; vanadium. Moreover, a high concentration of vanadium (>5 at.%) resulted in a significant increase in tangent loss at low frequencies (<1000 Hz). The relationships between chemical composition, processing condition, microstructure, and dielectric properties of SBVN ferroelectric ceramics are discussed.