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Morphology-controlled synthesis of α-alumina microplatelets through an additive-assisted molten salt reaction
- Source :
- Materials Letters. 210:182-185
- Publication Year :
- 2018
- Publisher :
- Elsevier BV, 2018.
-
Abstract
- Highly dispersed α-Al2O3 microplatelets of various sizes and aspect ratios were prepared by additive-assisted molten salt synthesis. The effects of SiO2 and SiO2 + CaO additions on phase formation and morphology development of α-Al2O3 particles were investigated. Introducing additives are very effective in controlling α-Al2O3 morphology. SiO2 additive significantly enhances shape anisotropy of α-Al2O3 platelets, where a particle aspect ratio ∼23.8 was achieved, about 2.7–6.0 times higher than those of the platelets prepared without additives. When using SiO2 + CaO mixture, low concentration additive facilitates the growth of large platelets (∼9.8 µm), while increasing its content dramatically reduces the platelet size to ∼3.7 µm. These findings provide a new insight for the design and synthesis of novel advanced anisotropic microcrystals with improved quality.
- Subjects :
- 010302 applied physics
Materials science
Morphology (linguistics)
Mechanical Engineering
Large Platelets
Mineralogy
Crystal growth
02 engineering and technology
021001 nanoscience & nanotechnology
Condensed Matter Physics
01 natural sciences
Aspect ratio (image)
Phase formation
Chemical engineering
Mechanics of Materials
0103 physical sciences
Particle
General Materials Science
Molten salt
0210 nano-technology
Anisotropy
Subjects
Details
- ISSN :
- 0167577X
- Volume :
- 210
- Database :
- OpenAIRE
- Journal :
- Materials Letters
- Accession number :
- edsair.doi...........afb0e1c535d087cc2d4638ccc8379aeb