Obtaining nanosized niobium and tantalum pentoxides by using supercritical antisolvent fluid technology
Niobium and tantalum methylates with common formula M2(OMe)10 , where M - Nb,Ta, have been synthesized as precursors by electrochemical synthesis for obtaining niobium and tantalum oxides. Ultradispersed and nanosized oxides TT (δ)-Nb2O5 and T (γ)-Ta2O5 were obtained by supercritical fluid technolog...
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| Format: | Article |
| Language: | Russian |
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MIREA - Russian Technological University
2015-02-01
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| Series: | Тонкие химические технологии |
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| Online Access: | https://www.finechem-mirea.ru/jour/article/view/222 |
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| author | K. A. Smirnova V. V. Fomichev D. V. Drobot E. E. Nikishina |
| author_facet | K. A. Smirnova V. V. Fomichev D. V. Drobot E. E. Nikishina |
| author_sort | K. A. Smirnova |
| collection | DOAJ |
| description | Niobium and tantalum methylates with common formula M2(OMe)10 , where M - Nb,Ta, have been synthesized as precursors by electrochemical synthesis for obtaining niobium and tantalum oxides. Ultradispersed and nanosized oxides TT (δ)-Nb2O5 and T (γ)-Ta2O5 were obtained by supercritical fluid technology. The samples are characterized by different methods (chemical analysis, DTA-DTG, XRD, IR-spectroscopy, grain size analysis). It is shown that under the experimental conditions amorphous particles of niobium and tantalum pentoxides are formed, which react to form the crystalline state at temperatures of 600°C and 750°C respectively. Crystallization temperature of T(γ)-Ta2O5 obtained by SAS-technology significantly lower than the crystallization temperature of the same tantalum pentoxide obtained by heterophasic method (900°C). The particle size of the annealed tantalum pentoxide is in the range of nanosized materials, particle size of the annealed niobium pentoxide qualifies them as ultradispersed. |
| format | Article |
| id | doaj-art-becfcd67cfb44707b9af9dfe24987e0d |
| institution | Kabale University |
| issn | 2410-6593 2686-7575 |
| language | Russian |
| publishDate | 2015-02-01 |
| publisher | MIREA - Russian Technological University |
| record_format | Article |
| series | Тонкие химические технологии |
| spelling | doaj-art-becfcd67cfb44707b9af9dfe24987e0d2025-08-20T03:56:23ZrusMIREA - Russian Technological UniversityТонкие химические технологии2410-65932686-75752015-02-011017682216Obtaining nanosized niobium and tantalum pentoxides by using supercritical antisolvent fluid technologyK. A. Smirnova0V. V. Fomichev1D. V. Drobot2E. E. Nikishina3M.V. Lomonosov Moscow State University of Fine Chemical Technologies, 86, Vernadskogo pr., Moscow 119571M.V. Lomonosov Moscow State University of Fine Chemical Technologies, 86, Vernadskogo pr., Moscow 119571M.V. Lomonosov Moscow State University of Fine Chemical Technologies, 86, Vernadskogo pr., Moscow 119571M.V. Lomonosov Moscow State University of Fine Chemical Technologies, 86, Vernadskogo pr., Moscow 119571Niobium and tantalum methylates with common formula M2(OMe)10 , where M - Nb,Ta, have been synthesized as precursors by electrochemical synthesis for obtaining niobium and tantalum oxides. Ultradispersed and nanosized oxides TT (δ)-Nb2O5 and T (γ)-Ta2O5 were obtained by supercritical fluid technology. The samples are characterized by different methods (chemical analysis, DTA-DTG, XRD, IR-spectroscopy, grain size analysis). It is shown that under the experimental conditions amorphous particles of niobium and tantalum pentoxides are formed, which react to form the crystalline state at temperatures of 600°C and 750°C respectively. Crystallization temperature of T(γ)-Ta2O5 obtained by SAS-technology significantly lower than the crystallization temperature of the same tantalum pentoxide obtained by heterophasic method (900°C). The particle size of the annealed tantalum pentoxide is in the range of nanosized materials, particle size of the annealed niobium pentoxide qualifies them as ultradispersed.https://www.finechem-mirea.ru/jour/article/view/222sas-technology, supercritical fluid, niobium oxide, tantalum oxide, electrochemical synthesis, alkoxide, niobium methylate, tantalum methylate |
| spellingShingle | K. A. Smirnova V. V. Fomichev D. V. Drobot E. E. Nikishina Obtaining nanosized niobium and tantalum pentoxides by using supercritical antisolvent fluid technology Тонкие химические технологии sas-technology, supercritical fluid, niobium oxide, tantalum oxide, electrochemical synthesis, alkoxide, niobium methylate, tantalum methylate |
| title | Obtaining nanosized niobium and tantalum pentoxides by using supercritical antisolvent fluid technology |
| title_full | Obtaining nanosized niobium and tantalum pentoxides by using supercritical antisolvent fluid technology |
| title_fullStr | Obtaining nanosized niobium and tantalum pentoxides by using supercritical antisolvent fluid technology |
| title_full_unstemmed | Obtaining nanosized niobium and tantalum pentoxides by using supercritical antisolvent fluid technology |
| title_short | Obtaining nanosized niobium and tantalum pentoxides by using supercritical antisolvent fluid technology |
| title_sort | obtaining nanosized niobium and tantalum pentoxides by using supercritical antisolvent fluid technology |
| topic | sas-technology, supercritical fluid, niobium oxide, tantalum oxide, electrochemical synthesis, alkoxide, niobium methylate, tantalum methylate |
| url | https://www.finechem-mirea.ru/jour/article/view/222 |
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