Coupled TG-MS study on the intermediate for formation of PbO(t) from PbO(O) in synthesis of perovskite PMN-PT |
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| Authors: | Kyoung Ran Han Chang-Sam Kim |
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| Institution: | a Division of Materials Science and Engineering, Korea Institute of Science and Technology, Seoul 131-791, Republic of Korea
b Department of Chemistry, Catholic University of Korea, Puchon 420-743, Republic of Korea |
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| Abstract: | Pb(OH)2 was previously proposed as an intermediate in the synthesis of PMN Pb(Mg1/3Nb2/3)O3] and PMN-PT 0.9Pb(Mg1/3Nb2/3)O3-0.1PbTiO3] from a mixture of PbO, Nb2O5, Mg(NO3)2·6H2O (w/w0) TiO2 by the modified mixed oxide method based on TG/DSC and XRD data. Coupled TG-MS of the precursor reveals that the intermediate is Pb6O5(NO3)2, not Pb(OH)2 because the evolved gas was nitric oxide and oxygen, not water. |
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| Keywords: | Oxide Chemical synthesis Differential scanning calorimetry Thermogravimetric analysis Ferroelectricity |
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