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The Pb(Mn 1/3 Nb 2/3 )O 3 ceramics has been obtained from oxides by sintering in air, using a two-stage process with precursor columbite-like (Mn 0.5 Nb)O 3 phase. The PbO oxide was added in the second stage. Analysis of the X-ray diffraction pattern shows that the ceramics consist of 91% of major perovskite phase. A monoclinic distortion of the perovskite structure...
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