Abstract
Novel MgO microspheres modified with Mg(OH)2 nanoflakes were prepared by flame spraying, where the microspheres were 15–70μm, and the nanoflakes had a thickness of about 10nm. The Mg(OH)2 nanoflakes could be converted into MgO by calcination at 350°C for 2h, and during this phase transformation the nanoflake morphology was well preserved. With a micro/nano-complex structure, the MgO microspheres showed acceptable flowability and specific surface area of 21.6m2/g. The bandgap energy and refractive index of the MgO microspheres were estimated to be Eg=5.5eV and n=1.826.
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