2019
DOI: 10.1515/znb-2019-0080
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## Abstract:Hexagonal α-Al2O3 platelets with about 1-μm diameter and 0.2-μm thickness are prepared by the calcination of a milled Al(OH)3 precursor with NH4F and NH4Cl additives. The influences of the ball milling treatment and the composite additive on the microstructure of α-Al2O3 micro-powders are studied. The results indicate that the particle size distribution of α-Al2O3 is highly dependent on the aggregate size of the Al(OH)3 precursor and that the morphology of α-Al2O3 can be significantly favored by the addition o… Show more

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##### Cited by 7 publications
(2 citation statements)
##### References 27 publications
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“…Alumina is a compound that exhibits several phases like α, γ, β and θ, etc [1]. While the most stable phase is α-alumina with very interesting properties such as high hardness, high melting temperature, chemical stability and high elastic modulus [1][2][3][4]. Moreover, the combination of a high thermal coefficient, low thermal expansion and high compressive strength provides αalumina a good resistance to thermal shock [1,5].…”
Section: Introductionmentioning
confidence: 99%
See 1 more Smart Citation
“…Alumina is a compound that exhibits several phases like α, γ, β and θ, etc [1]. While the most stable phase is α-alumina with very interesting properties such as high hardness, high melting temperature, chemical stability and high elastic modulus [1][2][3][4]. Moreover, the combination of a high thermal coefficient, low thermal expansion and high compressive strength provides αalumina a good resistance to thermal shock [1,5].…”
Section: Introductionmentioning
confidence: 99%
“…All these important properties make αalumina a material in demand in a wide variety of fields. It is used to produce refractory ceramics, high-strength ceramics, abrasives and other ceramic materials [2,4]. Submicronic and Nano-sized α-alumina powders are also in demand in the field of catalysis as a thermally stable alternative to the widely used transition alumina powders, that undergo phase transformations when used at high temperatures [6].…”
Section: Introductionmentioning
confidence: 99%