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Synthesis of lead metaniobate by thermal decomposition of a coprecipitation product |
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| Authors: | L. Marta M. Zaharescu I. Haiduc |
| Affiliation: | 1. Chemistry Laboratory, Department of Materials Science, Technical University (formerly Polytechnic Institute), Cluj-Napoca, Romania 2. Institute of Physical Chemistry, Roumanian Academy, Bucharest, Romania 3. Chemistry Department, Babes-Bolyai University, Cluj-Napoca, Romania |
| Abstract: | The paper reports a new, nonconventional method for the preparation of oxygen-containing niobium compounds, based upon coprecipitation. The coprecipitation product of niobic acid with lead oxalate was used as precursor. Lead metaniobate was obtained by proper thermal treatment of the coprecipitate. The coprecipitate mechanism was studied and the optimal conditions for quantitative precipitation of niobium and lead were established. The mechanism of thermal decomposition of the coprecipitate was investigated by differential thermal analysis and X-ray powder diagrams. The final product of thermal decomposition, lead metaniobate, is formed at 850°C. |
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