Reaction mechanisms of PMN-PT powder prepared by molten salt synthesis

Yang Zupei The College of Material Science and Engineering, The Northwestern Polytechnical University, 710072, Xi'an, Shaanxi, PRC

Zhou Shaorong The College of Material Science and Engineering, The Northwestern Polytechnical University, 710072, Xi'an, Shaanxi, PRC

Qu Shaobo The College of Material Science and Engineering, The Northwestern Polytechnical University, 710072, Xi'an, Shaanxi, PRC

Cui Bin The College of Material Science and Engineering, The Northwestern Polytechnical University, 710072, Xi'an, Shaanxi, PRC

Tian Changsheng The College of Material Science and Engineering, The Northwestern Polytechnical University, 710072, Xi'an, Shaanxi, PRC

Abstract

By analyzing the x-ray diffraction (XRD) and differential thermal analysis (DTA) data, the difference of reacting mechanism of molten salt synthesis (MSS) and conventional mixed oxide (CMO) method were studied. The results indicated that as for MSS, unstable and B-site vacant pyrochlore phase of Pb₃Nb₂O₈ was produced and Nb⁵⁺ vacancies of Pb₃Nb₂O₈ could be occupied by Mg²⁺, forming an intermediate Pb₂Nb_4/3Mg_2/3O₆ which had low apparent activation energy and was very easy to transform into perovskite phase structure. The reaction mechanism of Pb(Mg_1/3Nb_2/3)O₃-PbTiO₃ (PMN-PT) prepared by MSS was proposed

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Reaction mechanisms of PMN-PT powder prepared by molten salt synthesis

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Reaction mechanisms of PMN-PT powder prepared by molten salt synthesis

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