Recent Developments in Morphological Control of α-Al2O3Particles Synthesized in 1,4-Butanediol Solution

Autor:	Anthony J. Perrotta, Seung Beom Cho, Nelson S. Bell, James H. Adair
Rok vydání:	2001
Předmět:	Aqueous solution Polymers and Plastics Chemistry Precipitation (chemistry) Stereochemistry Hydrothermal circulation Surfaces Coatings and Films Metal Polyhedron Dodecahedron Boiling point Chemical engineering visual_art visual_art.visual_art_medium Particle size Physical and Theoretical Chemistry
Zdroj:	Journal of Dispersion Science and Technology. 22:143-165
ISSN:	1532-2351 0193-2691
DOI:	10.1081/dis-100105201
Popis:	Direct precipitation of metal oxides from high boiling point organic solvents presents an alternative to wholly aqueous hydrothermal material synthesis routes. In the current study, reaction conditions to control particle size and shape of α-alumina, precipitated from 1,4-butanediol solutions are described. Synthesis variables including reaction time, stirring speed, amount of methanol, and solid loading have a strong effect on the size and shape of α-alumina synthesized in 1,4-butanediol solutions conditions to prepare α-alumina crystals with different habits including circular platelets, hexagonal platelets, hexagonal platelets with habit modifications on the edges, dodecahedra, polyhedra with 14 faces, polyhedra with 20 faces, hexagonal prisms, and hexagonal prisms with habit modifications on the edges are presented. Possible growth mechanisms of α-Al2O3 particles in 1,4-butanediol solution are proposed based on theoretical shape and atomic surface structure generated with programs SHAPE© and ATOMS©. T...
Databáze:	OpenAIRE
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