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Processing and Properties of Textured Potassium Strontium Niobate ( KSr 2 Nb 5 O 15 ) Ceramic Fibers – Texture Development
Author(s) -
Alkoy Sedat,
Dursun Sinan
Publication year - 2012
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.1551-2916.2011.04994.x
Subject(s) - acicular , materials science , texture (cosmology) , ceramic , strontium , slurry , salt (chemistry) , morphology (biology) , sintering , potassium , grain growth , composite material , mineralogy , seeding , chemical engineering , grain size , metallurgy , microstructure , chemistry , image (mathematics) , organic chemistry , artificial intelligence , biology , computer science , engineering , genetics , aerospace engineering
Highly [001] textured KSr 2 Nb 5 O 15 ( KSN ) ceramic fibers were fabricated by a combination of novel alginate gelation method and templated grain growth using acicular KSr 2 Nb 5 O 15 template particles. The needle‐like KSN template particles were prepared by molten salt synthesis method with salt/powder ratio of 2 giving the highest aspect ratio. Fibers were extruded into CaCl 2 salt solutions from alginate‐based slurries without or with 10 wt% KSN template particles using a nozzle with 2 mm diameter and 80 mm length. Varying sintering temperature from 1300°C to 1450°C and time from 2 to 6 h were found to increase the texture. A maximum degree of orientation, ƒ (00l) , of 0.95 was obtained, as measured by Lotgering factor, and a grain orientation distribution, r , of 0.28 was obtained as measured by rocking curve analysis.