Key Words:Hematite;Energy efficiency - Etching - Magnetic resonance imaging - Milling (machining) - Paramagnetism - Rietveld analysis

Abstract:In this work, the milling-etching route is designed to synthesize nanoflakes with high-content Ε-Fe<inf>2</inf>O<inf>3</inf> phase, which is environmental friendly and more desirable for energy-efficient mass production of Ε-Fe<inf>2</inf>O<inf>3</inf> phase than conventional thermal treatment methods. More strikingly, this product conforms to the characteristics of paramagnetic-class properties, and our study shows that the unique property derived from Ε-Fe<inf>2</inf>O<inf>3</inf> phase is intimately related to large lattice strain and a few of small grains of Ε-Fe<inf>2</inf>O<inf>3</inf> based on Rietveld method and the law of approach to saturation. Relaxivities confirm the paramagnetic-class product has the potential to become a candidate as contrast agent in magnetic resonance imaging application filed. Our work not only sheds light on the preparation of Ε-Fe<inf>2</inf>O<inf>3</inf> phase, but also enables a new insight into the development of functional Ε-Fe<inf>2</inf>O<inf>3</inf> material in practical magnetically-relevant applications.<br/> © 2018 The Society of Powder Technology Japan

Volume:

Issue:2

Translation or Not:no