Study of the Aid Effect of CuO-TiO<sub>2</sub>-Nb<sub>2</sub>O<sub>5</sub> on the Dielectric and Structural Properties of Alumina Ceramics
The aim of this work is to study the structural, dielectric, and mechanical properties of aluminum oxide ceramics with the triple sintering additive 4CuO-TiO<sub>2</sub>-2Nb<sub>2</sub>O<sub>5</sub>. With an increase in sintering temperature from 1050 to 1500 °C,...
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| Online Access: | https://www.mdpi.com/1996-1944/16/14/5018 |
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| author | Rafael I. Shakirzyanov Natalia O. Volodina Kayrat K. Kadyrzhanov Artem L. Kozlovskiy Dmitriy I. Shlimas Gulzada A. Baimbetova Daryn B. Borgekov Maxim V. Zdorovets |
| author_facet | Rafael I. Shakirzyanov Natalia O. Volodina Kayrat K. Kadyrzhanov Artem L. Kozlovskiy Dmitriy I. Shlimas Gulzada A. Baimbetova Daryn B. Borgekov Maxim V. Zdorovets |
| author_sort | Rafael I. Shakirzyanov |
| collection | DOAJ |
| description | The aim of this work is to study the structural, dielectric, and mechanical properties of aluminum oxide ceramics with the triple sintering additive 4CuO-TiO<sub>2</sub>-2Nb<sub>2</sub>O<sub>5</sub>. With an increase in sintering temperature from 1050 to 1500 °C, the average grain size and the microhardness value at a load of 100 N (HV0.1) increased with increasing density. It has been shown that at a sintering temperature of 1300 °C, the addition of a 4CuO-TiO<sub>2</sub>-2Nb<sub>2</sub>O<sub>5</sub> additive increases the low-frequency permittivity (2–500 Hz) in alumina ceramic by more than an order of magnitude due to the presence of a quadruple perovskite phase. At the same time, the density of such ceramics reached 89% of the theoretical density of α-Al<sub>2</sub>O<sub>3</sub>, and the microhardness value HV0.1 was 1344. It was observed that the introduction of 5 wt.% 4CuO-TiO<sub>2</sub>-2Nb<sub>2</sub>O<sub>5</sub> in the raw mixture remarkably increases values of shrinkage and density of sintered ceramics. Overall, the results of this work confirmed that introducing the 4CuO-TiO<sub>2</sub>-2Nb<sub>2</sub>O<sub>5</sub> sintering additive in the standard solid-phase ceramics route can significantly reduce the processing temperature of alumina ceramics, even when micron-sized powders are used as a starting material. The obtained samples demonstrated the potential of α-Al<sub>2</sub>O<sub>3</sub> with the triple additive in such applications as electronics, microwave technology, and nuclear power engineering. |
| first_indexed | 2024-03-11T00:52:54Z |
| format | Article |
| id | doaj.art-74333274f55a4693bf5e361a280fd365 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-11T00:52:54Z |
| publishDate | 2023-07-01 |
| publisher | MDPI AG |
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| series | Materials |
| spelling | doaj.art-74333274f55a4693bf5e361a280fd3652023-11-18T20:16:43ZengMDPI AGMaterials1996-19442023-07-011614501810.3390/ma16145018Study of the Aid Effect of CuO-TiO<sub>2</sub>-Nb<sub>2</sub>O<sub>5</sub> on the Dielectric and Structural Properties of Alumina CeramicsRafael I. Shakirzyanov0Natalia O. Volodina1Kayrat K. Kadyrzhanov2Artem L. Kozlovskiy3Dmitriy I. Shlimas4Gulzada A. Baimbetova5Daryn B. Borgekov6Maxim V. Zdorovets7Engineering Profile Laboratory, L.N. Gumilyov Eurasian National University, Satpayev St., Astana 010008, KazakhstanEngineering Profile Laboratory, L.N. Gumilyov Eurasian National University, Satpayev St., Astana 010008, KazakhstanEngineering Profile Laboratory, L.N. Gumilyov Eurasian National University, Satpayev St., Astana 010008, KazakhstanEngineering Profile Laboratory, L.N. Gumilyov Eurasian National University, Satpayev St., Astana 010008, KazakhstanEngineering Profile Laboratory, L.N. Gumilyov Eurasian National University, Satpayev St., Astana 010008, KazakhstanDepartment of Science, Abai Kazakh National Pedagogical University, Almaty 050010, KazakhstanEngineering Profile Laboratory, L.N. Gumilyov Eurasian National University, Satpayev St., Astana 010008, KazakhstanEngineering Profile Laboratory, L.N. Gumilyov Eurasian National University, Satpayev St., Astana 010008, KazakhstanThe aim of this work is to study the structural, dielectric, and mechanical properties of aluminum oxide ceramics with the triple sintering additive 4CuO-TiO<sub>2</sub>-2Nb<sub>2</sub>O<sub>5</sub>. With an increase in sintering temperature from 1050 to 1500 °C, the average grain size and the microhardness value at a load of 100 N (HV0.1) increased with increasing density. It has been shown that at a sintering temperature of 1300 °C, the addition of a 4CuO-TiO<sub>2</sub>-2Nb<sub>2</sub>O<sub>5</sub> additive increases the low-frequency permittivity (2–500 Hz) in alumina ceramic by more than an order of magnitude due to the presence of a quadruple perovskite phase. At the same time, the density of such ceramics reached 89% of the theoretical density of α-Al<sub>2</sub>O<sub>3</sub>, and the microhardness value HV0.1 was 1344. It was observed that the introduction of 5 wt.% 4CuO-TiO<sub>2</sub>-2Nb<sub>2</sub>O<sub>5</sub> in the raw mixture remarkably increases values of shrinkage and density of sintered ceramics. Overall, the results of this work confirmed that introducing the 4CuO-TiO<sub>2</sub>-2Nb<sub>2</sub>O<sub>5</sub> sintering additive in the standard solid-phase ceramics route can significantly reduce the processing temperature of alumina ceramics, even when micron-sized powders are used as a starting material. The obtained samples demonstrated the potential of α-Al<sub>2</sub>O<sub>3</sub> with the triple additive in such applications as electronics, microwave technology, and nuclear power engineering.https://www.mdpi.com/1996-1944/16/14/5018alumina ceramicsdielectric permittivityhardeningthe effect of the triple additiveperovskite phase |
| spellingShingle | Rafael I. Shakirzyanov Natalia O. Volodina Kayrat K. Kadyrzhanov Artem L. Kozlovskiy Dmitriy I. Shlimas Gulzada A. Baimbetova Daryn B. Borgekov Maxim V. Zdorovets Study of the Aid Effect of CuO-TiO<sub>2</sub>-Nb<sub>2</sub>O<sub>5</sub> on the Dielectric and Structural Properties of Alumina Ceramics Materials alumina ceramics dielectric permittivity hardening the effect of the triple additive perovskite phase |
| title | Study of the Aid Effect of CuO-TiO<sub>2</sub>-Nb<sub>2</sub>O<sub>5</sub> on the Dielectric and Structural Properties of Alumina Ceramics |
| title_full | Study of the Aid Effect of CuO-TiO<sub>2</sub>-Nb<sub>2</sub>O<sub>5</sub> on the Dielectric and Structural Properties of Alumina Ceramics |
| title_fullStr | Study of the Aid Effect of CuO-TiO<sub>2</sub>-Nb<sub>2</sub>O<sub>5</sub> on the Dielectric and Structural Properties of Alumina Ceramics |
| title_full_unstemmed | Study of the Aid Effect of CuO-TiO<sub>2</sub>-Nb<sub>2</sub>O<sub>5</sub> on the Dielectric and Structural Properties of Alumina Ceramics |
| title_short | Study of the Aid Effect of CuO-TiO<sub>2</sub>-Nb<sub>2</sub>O<sub>5</sub> on the Dielectric and Structural Properties of Alumina Ceramics |
| title_sort | study of the aid effect of cuo tio sub 2 sub nb sub 2 sub o sub 5 sub on the dielectric and structural properties of alumina ceramics |
| topic | alumina ceramics dielectric permittivity hardening the effect of the triple additive perovskite phase |
| url | https://www.mdpi.com/1996-1944/16/14/5018 |
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