The Effect of Dopants on Sintering and Microstructure of Lead-free KNN Ceramics
<p>Lead-free potassium sodium niobate (K<sub>0.5</sub>Na<sub>0.5</sub>)NbO<sub>3</sub> (KNN) has been prepared via conventional ceramic processing method. The influence of 0.5 wt% - 1.5 wt% MnO<sub>2</sub> and WO<sub>3</sub> addition...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Kaunas University of Technology
2011-03-01
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| Series: | Medžiagotyra |
| Subjects: | |
| Online Access: | http://matsc.ktu.lt/index.php/MatSc/article/view/251 |
| Summary: | <p>Lead-free potassium sodium niobate (K<sub>0.5</sub>Na<sub>0.5</sub>)NbO<sub>3</sub> (KNN) has been prepared via conventional ceramic processing method. The influence of 0.5 wt% - 1.5 wt% MnO<sub>2</sub> and WO<sub>3</sub> addition on the sintering, crystallographic structure, microstructure and dielectric properties of KNN has been investigated. Optimal sintering temperatures of KNN ceramics were observed to be in the narrow interval: 1090 °C - 1110 °C for MnO<sub>2</sub> doped KNN; 1150 °C - 1170 °C for pure KNN and doped with WO<sub>3</sub>. XRD patterns showed that all the samples have single perovskite structure with monoclinic structure. Microstructure of ceramics was changed greatly by using dopants.</p><p><a href="http://dx.doi.org/10.5755/j01.ms.17.1.251">http://dx.doi.org/10.5755/j01.ms.17.1.251</a></p> |
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| ISSN: | 1392-1320 2029-7289 |