Journal
CERAMICS INTERNATIONAL
Volume 43, Issue 8, Pages 6430-6436Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2017.02.056
Keywords
beta-gallium oxide; Transparent oxide semiconductors; Precipitation technique; Monodispersed particles; Ceramic target
Categories
Funding
- National Natural Science Foundation of China [51372093]
- Basic Research Project of Shenzhen [JCYJ20150630155150203]
- China Postdoctoral Science Foundation [2015M572136]
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Uniformly sized and monodispersed beta-Ga2O3 crystalline micro-rods and ellipsoids have been successfully synthesized through a facile direct precipitation technique, respectively, using Ga(NO3)(3) and NH4OH solution as starting materials. The as-prepared particles were characterized by XRD, FESEM equipped with EDS, TEM equipped with SAED, TG-DSC and Laser diffraction particle size analyzer, respectively. The results showed that the obtained beta-Ga2O3 particles with a narrow particle size distribution were assembled with single crystalline beta-Ga2O3 nano-sheets with the thickness of 100 nm. Furthermore, the reaction parameters including aging temperature, the molar concentration of Ga3+ and pH value had an essential effect on the morphology and size of the particles. Ostwald ripening and oriented attachment growth mechanism of the uniformly hierarchical beta-Ga2O3 crystals were proposed. Finally, the target fabricated by using the as-prepared beta-Ga2O3 particles as the raw materials exhibited a density as high as 6.01 g/cm(3), showing potential applications in the high-quality thin film formed by magnetron sputtering for optoelectronic devices.
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