Premium
Effects of Heating Rate on the Sintering Behavior and the Dielectric Properties of Ba 0.7 Sr 0.3 TiO 3 Ceramics Prepared by Boron‐Containing Liquid‐Phase Sintering
Author(s) -
Rhim Sung Min,
Bak Heungjin,
Hong Seokmin,
Kim Ok Kyung
Publication year - 2000
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.1151-2916.2000.tb01675.x
Subject(s) - sintering , materials science , dielectric , curie temperature , ceramic , boron , analytical chemistry (journal) , phase (matter) , mineralogy , liquid phase , phase transition , metallurgy , thermodynamics , condensed matter physics , chemistry , ferromagnetism , chromatography , physics , optoelectronics , organic chemistry
The effects of heating rate on the sintering behavior and the dielectric properties of Ba 0.7 Sr 0.3 TiO 3 ceramics prepared by boron‐containing liquid‐phase sintering were investigated. When 0.5 wt% B 2 O 3 was added to Ba 0.7 Sr 0.3 TiO 3 , sintering was achieved at ∼1150°C, and the overdoped B 2 O 3 did not form an adequate amount of liquid phase or volatilize; it remained in the samples and formed a secondary phase. A transition broadening was observed as the heating rate increased. As the heating rate increased, the Curie temperature increased and the maximum dielectric constant ( k max ) at the Curie temperature decreased. This result is attributable to a decrease in the diffuseness parameter (δ) and the tetragonality ( c / a ).