A New Correlation for the Effects of the Crystallite Size and Calcination Temperature on the Single Metal Oxides and Spinel Oxides Nanocrystal

Abstract

Five kinds of transition metal oxides, Cr 2 O 3, Mn 2 O 3, TiO 2, ZnO, NiO, and four kinds of spinel oxide, ZnM 2 O 4 (M = Cr, Fe, Co, and Mn), nanocrystals were synthesized by the glycothermal reaction of metal acetylacetonate and 1,4-butanediol at 250 and 300 °C. The products were then calcined at temperatures in the range of 500−900 °C. It is found that both the initial crystallite size and the calcination temperature affect crystal growth, and this behavior is unambiguously demonstrated by log−linear plotting between ( d/d o ) and T / .