SYNTHESIS AND CHARACTERISATION OF DIELECTRIC COMPOSITES PRODUCED FROM GLYCINE AND ALKALINE NIOBATE-BASED CERAMICS
Glycine exhibits a little piezoelectric response when poled, while lead-free alkaline niobate-based ceramics show much higher responses. This research investigates the synthesis of a dielectric composite from a combination of glycine and (K0.45Na0.51Li0.04) (Nb0.85Ta0.1Sb0.04) O3 (KNNLST) ceramics....
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| Format: | Article |
| Language: | English |
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Faculty of Engineering, University of Kufa
2024-01-01
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| Series: | Mağallaẗ Al-kūfaẗ Al-handasiyyaẗ |
| Subjects: | |
| Online Access: | https://journal.uokufa.edu.iq/index.php/kje/article/view/13429 |
| _version_ | 1797327108091936768 |
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| author | Henry E. Mgbemere Viktoriya Semeykina |
| author_facet | Henry E. Mgbemere Viktoriya Semeykina |
| author_sort | Henry E. Mgbemere |
| collection | DOAJ |
| description | Glycine exhibits a little piezoelectric response when poled, while lead-free alkaline niobate-based ceramics show much higher responses. This research investigates the synthesis of a dielectric composite from a combination of glycine and (K0.45Na0.51Li0.04) (Nb0.85Ta0.1Sb0.04) O3 (KNNLST) ceramics. The mixed oxide ceramics synthesis method was used to produce the ceramics, while glycine powder was commercially procured. The composition range of the shaped and heat-treated composites is from no ceramics to 100 wt.% ceramics content. X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), dielectric studies, and hysteresis measurements were used to characterize the samples. The obtained phases transformed from the monoclinic phase in glycine to a two-phase orthorhombic-tetragonal phase in the ceramics. The samples’ morphology revealed a dense microstructure with some cracks, large porosity, and smaller grain sizes. The dielectric properties showed increasing dielectric constant and loss values with increasing ceramics content, while the ac conductivity also increased with rising ceramics content. Improving the range of ceramics led to polarization hysteresis graphs indicating ferroelectricity in the samples. The properties of the composites show they can be used in electromechanical devices. |
| first_indexed | 2024-03-08T06:33:42Z |
| format | Article |
| id | doaj.art-c536fa08cb7649c4b06a997fde9002a7 |
| institution | Directory Open Access Journal |
| issn | 2071-5528 2523-0018 |
| language | English |
| last_indexed | 2024-03-08T06:33:42Z |
| publishDate | 2024-01-01 |
| publisher | Faculty of Engineering, University of Kufa |
| record_format | Article |
| series | Mağallaẗ Al-kūfaẗ Al-handasiyyaẗ |
| spelling | doaj.art-c536fa08cb7649c4b06a997fde9002a72024-02-03T11:02:25ZengFaculty of Engineering, University of KufaMağallaẗ Al-kūfaẗ Al-handasiyyaẗ2071-55282523-00182024-01-01151819410.30572/2018/kje/150106SYNTHESIS AND CHARACTERISATION OF DIELECTRIC COMPOSITES PRODUCED FROM GLYCINE AND ALKALINE NIOBATE-BASED CERAMICSHenry E. Mgbemere0Viktoriya Semeykina1Department of Metallurgical and Materials Engineering, University of Lagos, Akoka Lagos Nigeria.Institute of Advanced Ceramics, Hamburg University of Technology Hamburg Germany.Glycine exhibits a little piezoelectric response when poled, while lead-free alkaline niobate-based ceramics show much higher responses. This research investigates the synthesis of a dielectric composite from a combination of glycine and (K0.45Na0.51Li0.04) (Nb0.85Ta0.1Sb0.04) O3 (KNNLST) ceramics. The mixed oxide ceramics synthesis method was used to produce the ceramics, while glycine powder was commercially procured. The composition range of the shaped and heat-treated composites is from no ceramics to 100 wt.% ceramics content. X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), dielectric studies, and hysteresis measurements were used to characterize the samples. The obtained phases transformed from the monoclinic phase in glycine to a two-phase orthorhombic-tetragonal phase in the ceramics. The samples’ morphology revealed a dense microstructure with some cracks, large porosity, and smaller grain sizes. The dielectric properties showed increasing dielectric constant and loss values with increasing ceramics content, while the ac conductivity also increased with rising ceramics content. Improving the range of ceramics led to polarization hysteresis graphs indicating ferroelectricity in the samples. The properties of the composites show they can be used in electromechanical devices.https://journal.uokufa.edu.iq/index.php/kje/article/view/13429glycinecompositesknnlst ceramicsamino aciddielectric |
| spellingShingle | Henry E. Mgbemere Viktoriya Semeykina SYNTHESIS AND CHARACTERISATION OF DIELECTRIC COMPOSITES PRODUCED FROM GLYCINE AND ALKALINE NIOBATE-BASED CERAMICS Mağallaẗ Al-kūfaẗ Al-handasiyyaẗ glycine composites knnlst ceramics amino acid dielectric |
| title | SYNTHESIS AND CHARACTERISATION OF DIELECTRIC COMPOSITES PRODUCED FROM GLYCINE AND ALKALINE NIOBATE-BASED CERAMICS |
| title_full | SYNTHESIS AND CHARACTERISATION OF DIELECTRIC COMPOSITES PRODUCED FROM GLYCINE AND ALKALINE NIOBATE-BASED CERAMICS |
| title_fullStr | SYNTHESIS AND CHARACTERISATION OF DIELECTRIC COMPOSITES PRODUCED FROM GLYCINE AND ALKALINE NIOBATE-BASED CERAMICS |
| title_full_unstemmed | SYNTHESIS AND CHARACTERISATION OF DIELECTRIC COMPOSITES PRODUCED FROM GLYCINE AND ALKALINE NIOBATE-BASED CERAMICS |
| title_short | SYNTHESIS AND CHARACTERISATION OF DIELECTRIC COMPOSITES PRODUCED FROM GLYCINE AND ALKALINE NIOBATE-BASED CERAMICS |
| title_sort | synthesis and characterisation of dielectric composites produced from glycine and alkaline niobate based ceramics |
| topic | glycine composites knnlst ceramics amino acid dielectric |
| url | https://journal.uokufa.edu.iq/index.php/kje/article/view/13429 |
| work_keys_str_mv | AT henryemgbemere synthesisandcharacterisationofdielectriccompositesproducedfromglycineandalkalineniobatebasedceramics AT viktoriyasemeykina synthesisandcharacterisationofdielectriccompositesproducedfromglycineandalkalineniobatebasedceramics |