Mechano‐Synthesis of Lead–Magnesium–Niobate Ceramics

Abstract

The synthesis of Pb(Mg 1/3 Nb 2/3 )O 3 (PMN) with high‐energy milling was studied by X‐ray powder diffraction (XRD) using the Rietveld‐refinement method. The results are discussed in terms of the qualitative and quantitative composition of the crystalline and amorphous phases as a function of milling time. The mechano‐synthesis of PbO, Nb 2 O 5 , and MgO leads to the formation of perovskite PMN. In the initial stage of milling, particle size reduction and a high degree of amorphization were observed, together with the simultaneous formation of perovskite and pyrochlore‐type structures. A mechanism for the formation of PMN by the mechano‐synthesis route is proposed.