| Autor: |
Zong-Yang Shen, Zhu Mei Wang, Zhi Liu, Yueming Li |
| Rok vydání: |
2012 |
| Předmět: |
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| Zdroj: |
Key Engineering Materials. :1395-1398 |
| ISSN: |
1662-9795 |
| DOI: |
10.4028/www.scientific.net/kem.512-515.1395 |
| Popis: |
In this study, single-crystalline plate-shaped KNN particles were successfully synthesized by a multi-step molten salt method (MMSM). First, precursor particles K4Nb6O17 (K4N6) with layer-structure was synthesized at 1050 °C in molten KCl-salt (MMSM-1) by starting materials of Nb2O5 and K2CO3. Second, plate-shaped KNN was synthesized at 1000 °C in molten KCl-NaCl-salt (MMSM-2) from K4N6 particles and K2CO3 powders. X-ray diffraction (XRD) analysis revealed that the crystallographic {010} plane of K4N6 was converted into the pseudo-cubic {001} plane of KNN. SEM images showed that MMSM-synthesized KNN particles preserved the shape of K4N6 precursor particles, and had a thickness of about 3 ~ 5 μm, a width of 10 ~ 15 μm and a length of 15 ~ 20 μm. EDX spectrum proved that the K:Na mole ratio was 0.6:0.4. These plate-shaped KNN particles were very promising templates to fabricating textured KNN-based ceramics. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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