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Electrical Properties of Textured Potassium Strontium Niobate (KSr 2 Nb 5 O 15 ) Ceramics Fabricated by Reactive Templated Grain Growth
Author(s) -
Alkoy Sedat,
Duran Cihangir,
Hall David A.
Publication year - 2008
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.1551-2916.2008.02342.x
Subject(s) - materials science , texture (cosmology) , acicular , grain growth , ceramic , strontium barium niobate , ferroelectricity , dielectric , analytical chemistry (journal) , mineralogy , sintering , curie temperature , piezoelectricity , potassium niobate , grain size , composite material , microstructure , ferromagnetism , optoelectronics , chemistry , condensed matter physics , chromatography , image (mathematics) , physics , artificial intelligence , computer science
Highly [001] textured KSr 2 Nb 5 O 15 (KSN) ceramics were fabricated by templated grain growth using acicular KSN template particles (5–15 wt%) and reactive matrix of SrNb 2 O 6 and KNbO 3 . Excess Nb 2 O 5 (1–1.5 wt%) was added as a liquid former. Increasing sintering temperature and time resulted in increased texture with a maximum texture fraction of 0.98. Dielectric, ferroelectric, and piezoelectric measurements indicate anisotropic properties that are close to single crystal values in the textured ceramics with the highest P r ≈18 μC/cm 2 , P s ≈25 μC/cm 2 , and d 33 =65 pC/N obtained in the c ‐axis direction.