Regular MgO nanoflowers and their enhanced dielectric responses

Abstract

Regular MgO nanoflowers were synthesized via a simple chemical route. The as-synthesized nanoflowers are single crystalline and consist of MgO nanofibers which have lengths up to several micrometers and diameters in the range of 20–80nm, with an average of 50nm. The frequency spectra of the relative dielectric constant and the dielectric loss were measured in the frequency range of 50Hzto5MHz. Temperature spectra of the relative dielectric constant were also measured and the experimental results showed that MgO nanoflowers have a much higher relative dielectric constant as compared with MgO micropowders, especially at low frequencies at room temperature.