Synthesis of Cubic Alpha-Alumina Using a Blocking Reagent of Tetraethyl Ammonium Hydroxide

Title
Synthesis of Cubic Alpha-Alumina Using a Blocking Reagent of Tetraethyl Ammonium Hydroxide
Author(s)
강미숙김현수박노국이태진
Keywords
BEHAVIOR
Issue Date
201502
Publisher
AMER SCIENTIFIC PUBLISHERS
Citation
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, v.15, no.2, pp.1383 - 1388
Abstract
This study was an attempt to obtain a stable and reproducible cubic primary alumina by a hydrothermal method using various aluminum precursors, AIP, AlO(OH), and Al(OH)(3). Tetraethyl ammonium hydroxide was introduced as a blocking reagent to control the shape of alumina. The synthesized primary alumina powders from Al precursors showed a boehmite structure after hydrothermal treatment at 200 degrees C for 1 h. The primary alumina powders synthesized using the precursors of AIP and AlO(OH) had irregular shapes, however the cubic-shape of approximately 300 nm was observed in the primary alumina powder synthesized using Al(OH)(3) precursor. The cubic primary alumina samples were transformed to different solid phases like gamma-, delta-, theta-, and alpha-phases according to the calcined temperatures. The theta-phase alumina formed at 1100 degrees C continually kept the cubic shape, but the shape was collapsed at 1200 degrees C. However the cubic alpha-alumina was stably remained by thermal treatment at 1100 degrees C under the fierce oxygen atmosphere.
URI
http://hdl.handle.net/YU.REPOSITORY/33476http://dx.doi.org/10.1166/jnn.2015.9307
ISSN
1533-4880
Appears in Collections:
이과대학 > 화학생화학부 > Articles
문과대학 > 중국언어문화학과 > Articles
공과대학 > 화학공학부 > Articles
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