Report
Effect of antimony substitution for niobium on the crystal structure, piezoelectric and dielectric properties of (K0.5Na0.5)NbO3 ceramics
| العنوان: | Effect of antimony substitution for niobium on the crystal structure, piezoelectric and dielectric properties of (K0.5Na0.5)NbO3 ceramics |
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| المؤلفون: | Mgbemere, Henry Ekene, Schneider, Gerold A., Stegk, Tobias |
| سنة النشر: | 2010 |
| المجموعة: | Hamburg University of Technology (TUHH): TUBdok |
| مصطلحات موضوعية: | blei frei piezokeramik, kalium natrium niobat, Lead-free piezoelectrics, ceramics, potassium sodium niobate, 620:Ingenieurwissenschaften, 620:Engineering and allied operations, 51.45:Werkstoffe mit besonderen Eigenschaften, 51.30:Werkstoffprüfung, Werkstoffuntersuchung, 51.60:Keramische Werkstoffe, Hartstoffe, Piezokeramik, 51.45, 51.60, 51.30 |
| Time: | 620 |
| الوصف: | The effect of antimony substitution for niobium on potassium sodium niobate (KNN) ceramic was investigated with respect to the densification behaviour at different sintering temperatures, microstructure and electrical properties. Sb5+ was slightly added while simultaneously lowering the amount of Nb5+and in this study of the (K0.5Na0.5)(Nb1-xSbx)O3 system, x content was varied from 0 to 14 mol.% Our results show that Sb5+ slightly increased the optimum sintering temperature for KNN but above 8 mol %, its resistivity and piezoelectric properties decreased. As the amount of Sb5+ substituted is increased, the structure of the ceramic transformed from orthorhombic to pseudocubic which led to slight shrinkage in the unit cell volume. Microstructural examination revealed that above 10 mol %, a second phase (K2NaSb3O9) was formed which segregated mainly to the grain boundary while the quantitative EDX analysis showed that there was A-site vacancy due to loss of the alkali elements. The two phase transitions points, Curie temperature (TC) and the tetragonal to orthorhombic (TT-O) shifted to lower temperature with increasing Sb5+ content and above 10 mol %, the TT-O shifted to below room temperature. The dielectric loss slightly increases with increasing Sb5+ content up to 200°C. There was an improvement in the piezoelectric properties with ≤ 6 mol % Sb content while optimum properties were obtained with 4 mol % (KP = 0.46, Qm= 6.2, NP = 2296). |
| نوع الوثيقة: | report |
| وصف الملف: | application/pdf |
| اللغة: | English |
| Relation: | Functional materials letters; Vol. 3.2010, no.1, pp. 25-30; 627848672; http://tubdok.tub.tuhh.de/handle/11420/810; urn:nbn:de:101:1-201505261647; 11420/810; 930768585 |
| DOI: | 10.15480/882.808 |
| الاتاحة: | http://tubdok.tub.tuhh.de/handle/11420/810 https://nbn-resolving.org/urn:nbn:de:101:1-201505261647 https://doi.org/10.15480/882.808 |
| Rights: | info:eu-repo/semantics/openAccess ; http://doku.b.tu-harburg.de/doku/lic_ohne_pod.php |
| رقم الانضمام: | edsbas.4AD3BD2B |
| قاعدة البيانات: | BASE |
| DOI: | 10.15480/882.808 |
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