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Orientation‐Control Synthesis of KTa 0.25 Nb 0.75 O 3 Nanorods
Author(s) -
Hu YongMing,
Gu HaoShuang,
Zhou Di,
Wang Zhao,
Chan Helen LaiWa,
Wang Yu
Publication year - 2010
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.1551-2916.2009.03461.x
Subject(s) - nanorod , materials science , orthorhombic crystal system , polyvinyl alcohol , raman spectroscopy , polyacrylic acid , polymer , hydrothermal synthesis , chemical engineering , hydrothermal circulation , perovskite (structure) , nanotechnology , crystal structure , crystallography , chemistry , optics , composite material , physics , engineering
Single‐crystalline KTa 0.25 Nb 0.75 O 3 (KTN) nanorods with an orthorhombic perovskite structure were synthesized via a polymer‐assisted hydrothermal method. The preferred crystallographic orientation of the nanorods were found to be controllable by using different types of polymers in the process; that is, [001]‐oriented KTN were obtained upon the use of polyvinyl alcohol (PVA) and [110]‐oriented ones were formed with the use of a combination of polyacrylic acid and PVA. The two types of nanorods showed different properties. The [110]‐oriented nanorods exhibited a better photocatalytic decolorization efficiency but very likely a lower thermal conductivity (as indicated by the Raman spectrum measurements) than the [001] nanorods.