Potassium zirconium oxalate a new precursor for the preparation of perovskite, pyrochlore and Nasicon type materials
| Autor: | Kammara Vaishnavi, Gundeboina Ravi, Maligi Malathi, Manasa Sunku, Muga Vithal |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Potassium Pyrochlore Infrared spectroscopy chemistry.chemical_element 02 engineering and technology engineering.material 010402 general chemistry 01 natural sciences Oxalate Inorganic Chemistry chemistry.chemical_compound Materials Chemistry Physical and Theoretical Chemistry Phosphoric acid Perovskite (structure) Zirconium Thermal decomposition 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences Electronic Optical and Magnetic Materials chemistry Ceramics and Composites engineering 0210 nano-technology Nuclear chemistry |
| Zdroj: | Journal of Solid State Chemistry. 276:133-138 |
| ISSN: | 0022-4596 |
| DOI: | 10.1016/j.jssc.2019.04.038 |
| Popis: | A new precursor, potassium zirconium oxalate pentahydrate, K4[Zr(C2O4)4]·5H2O, was used for the preparation of zirconium containing perovskite, pyrochlore and Nasicon type materials. Perovskites (BaZrO3, CaZrO3, SrZrO3 and PbZrO3) were prepared by the thermal decomposition of a mixture of potassium zirconium oxalate pentahydrate and MCl2 (M = Ba, Ca, Pb and Sr). Pyrochlore type materials, Ln2Zr2O7 (Ln = Pr, Nd and Gd) were synthesized by heating a mixture of potassium zirconium oxalate pentahydrate and LnCl3. Nasicon type composition, KZr2(PO4)3 was obtained using potassium zirconium oxalate pentahydrate and phosphoric acid by hydrothermal method. Hydrothermal treatment of potassium zirconium oxalate pentahydrate in basic, neutral and acidic medium gave different products. A compound, ZrO(C2O4)·xH2O (x = 1.2–1.8), was obtained from hydrothermal heating of parent potassium zirconium oxalate pentahydrate in acid medium. The TGA profile of ZrO(C2O4)·xH2O was recorded. All the prepared compositions were characterized by powder X-ray diffraction technique. The composition ZrO(C2O4)·xH2O was characterized by Fourier-transform infrared spectroscopy, elemental analysis, XPS and powder XRD techniques. The advantages of this precursor over other zirconium containing compounds and reasons for the formation of final products are discussed. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect