Effect of modifiers on the barium niobate-calcium ceramics structure
In this work, the ceramic samples Са0,3Ba0,7Nb2O6 pure and with modifying additives (5%) SrTiO3, KTaO3 or LiTaO3 were obtained by solid-phase synthesis. All studied compositions of ceramics revealed the presence of large and small grains. It is shown that the addition of LiTaO3 to the composition of...
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| Format: | Article |
| Language: | Russian |
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Tver State University
2022-12-01
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| Series: | Физико-химические аспекты изучения кластеров, наноструктур и наноматериалов |
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| Online Access: | https://physchemaspects.ru/2022/doi-10-26456-pcascnn-2022-14-572/?lang=en |
| _version_ | 1828090212662640640 |
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| author | O.S. Guseva O.V. Malyshkina A.S. Mitchenko |
| author_facet | O.S. Guseva O.V. Malyshkina A.S. Mitchenko |
| author_sort | O.S. Guseva |
| collection | DOAJ |
| description | In this work, the ceramic samples Са0,3Ba0,7Nb2O6 pure and with modifying additives (5%) SrTiO3, KTaO3 or LiTaO3 were obtained by solid-phase synthesis. All studied compositions of ceramics revealed the presence of large and small grains. It is shown that the addition of LiTaO3 to the composition of Са0,3Ba0,7Nb2O6 ceramics reduces the grain size by an order of magnitude, while the addition of SrTiO3 leads to an elongation of the grain shape. Based on the analysis of the elemental composition, it was found that the introduction of modifiers into the composition of Са0,3Ba0,7Nb2O6 reduces the excess of oxygen in the structure of tetragonal tungsten bronze, compared to unmodified Са0,3Ba0,7Nb2O6 ceramics. The maximum on the temperature dependence of the permittivity is practically independent of the type of modifier and is located in the range of 279-285°C. This is 60 degrees higher than the Curie temperature of the Са0,3Ba0,7Nb2O6 single crystal. Regardless of the measurement temperature, Са0,3Ba0,7Nb2O6 + 5%SrTiO3 material has the maximum value of the permittivity. Whereas the minimum value of the permittivity at room temperature has the Са0,3Ba0,7Nb2O6 + 5%LiTaO3 sample, and at the Curie point, the Са0,3Ba0,7Nb2O6 sample. |
| first_indexed | 2024-04-11T05:53:13Z |
| format | Article |
| id | doaj.art-93118a31a2c24b6696d8a6c9bb193ab7 |
| institution | Directory Open Access Journal |
| issn | 2226-4442 2658-4360 |
| language | Russian |
| last_indexed | 2024-04-11T05:53:13Z |
| publishDate | 2022-12-01 |
| publisher | Tver State University |
| record_format | Article |
| series | Физико-химические аспекты изучения кластеров, наноструктур и наноматериалов |
| spelling | doaj.art-93118a31a2c24b6696d8a6c9bb193ab72022-12-22T04:42:00ZrusTver State UniversityФизико-химические аспекты изучения кластеров, наноструктур и наноматериалов2226-44422658-43602022-12-011457258210.26456/pcascnn/2022.14.572Effect of modifiers on the barium niobate-calcium ceramics structure O.S. Guseva0O.V. Malyshkina1A.S. Mitchenko2Tver State Medical University, Tver, RussiaTver State University, Tver, RussiaTver State University, Tver, RussiaIn this work, the ceramic samples Са0,3Ba0,7Nb2O6 pure and with modifying additives (5%) SrTiO3, KTaO3 or LiTaO3 were obtained by solid-phase synthesis. All studied compositions of ceramics revealed the presence of large and small grains. It is shown that the addition of LiTaO3 to the composition of Са0,3Ba0,7Nb2O6 ceramics reduces the grain size by an order of magnitude, while the addition of SrTiO3 leads to an elongation of the grain shape. Based on the analysis of the elemental composition, it was found that the introduction of modifiers into the composition of Са0,3Ba0,7Nb2O6 reduces the excess of oxygen in the structure of tetragonal tungsten bronze, compared to unmodified Са0,3Ba0,7Nb2O6 ceramics. The maximum on the temperature dependence of the permittivity is practically independent of the type of modifier and is located in the range of 279-285°C. This is 60 degrees higher than the Curie temperature of the Са0,3Ba0,7Nb2O6 single crystal. Regardless of the measurement temperature, Са0,3Ba0,7Nb2O6 + 5%SrTiO3 material has the maximum value of the permittivity. Whereas the minimum value of the permittivity at room temperature has the Са0,3Ba0,7Nb2O6 + 5%LiTaO3 sample, and at the Curie point, the Са0,3Ba0,7Nb2O6 sample. https://physchemaspects.ru/2022/doi-10-26456-pcascnn-2022-14-572/?lang=enpiezoelectric ceramicsbarium-calcium niobatelead-free materialsmodifiersgrain structurepermittivity |
| spellingShingle | O.S. Guseva O.V. Malyshkina A.S. Mitchenko Effect of modifiers on the barium niobate-calcium ceramics structure Физико-химические аспекты изучения кластеров, наноструктур и наноматериалов piezoelectric ceramics barium-calcium niobate lead-free materials modifiers grain structure permittivity |
| title | Effect of modifiers on the barium niobate-calcium ceramics structure |
| title_full | Effect of modifiers on the barium niobate-calcium ceramics structure |
| title_fullStr | Effect of modifiers on the barium niobate-calcium ceramics structure |
| title_full_unstemmed | Effect of modifiers on the barium niobate-calcium ceramics structure |
| title_short | Effect of modifiers on the barium niobate-calcium ceramics structure |
| title_sort | effect of modifiers on the barium niobate calcium ceramics structure |
| topic | piezoelectric ceramics barium-calcium niobate lead-free materials modifiers grain structure permittivity |
| url | https://physchemaspects.ru/2022/doi-10-26456-pcascnn-2022-14-572/?lang=en |
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