Premium
Crystal Structure and Related Properties of Manganese‐Doped Barium Titanate Ceramics
Author(s) -
Langhammer Hans Theo,
Müller Thomas,
Felgner KarlHeinz,
Abicht HansPeter
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.tb01239.x
Subject(s) - tetragonal crystal system , microstructure , materials science , barium titanate , manganese , crystal structure , annealing (glass) , reducing atmosphere , ceramic , oxidizing agent , crystallography , phase (matter) , mineralogy , metallurgy , chemistry , organic chemistry
The influence of manganese on the crystallographic phase and the microstructure of BaTi 1− x Mn x O 3 ceramics (0 ≤ x ≤ 0.05) is investigated. The crystal structure at room temperature changes from tetragonal to hexagonal between x = 0.005 and 0.017, which causes a drastic change in the microstructure. The Jahn_Teller distortion caused by the Mn Ti 3+ ions is proposed as the driving force for the phase transition. Annealing of the as‐fired samples in both a reducing and oxidizing atmosphere restores the tetragonal phase, which is accompanied by a change in the microstructure based on the percentage of tetragonal phase.