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Conventionally Sintered (Na 0.5 ,K 0.5 )NbO 3 with Barium Additions
Author(s) -
Ahn Zou Sam,
Schulze Walter A.
Publication year - 1987
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.1151-2916.1987.tb04862.x
Subject(s) - sintering , potassium niobate , materials science , barium , permittivity , ceramic , mineralogy , electrical resistivity and conductivity , analytical chemistry (journal) , phase (matter) , potassium , dielectric , natural bond orbital , solubility , composite material , metallurgy , chemistry , ferroelectricity , optoelectronics , organic chemistry , chromatography , density functional theory , computational chemistry , electrical engineering , engineering
The effect of Ba additions on sodium potassium niobate (NKN) ceramic bodies was investigated with regard to sintering behavior, densification, and electrical properties. Small additions of Ba retard grain growth and increase density. The approximate solubility limit of Ba is 1.5 mol%. During firing the loss of Na and K was very low. Both electrical phase transitions in NKN are lowered with Ba additions. The Ba‐containing bodies show higher permittivity values than hot‐pressed materials, while radial coupling and d 33 were similar to or higher than those of the conventionally sintered pure materials.