Sodium niobate particles with controlled morphology synthesized by hydrothermal method and their use as templates in KNN fibers
Advanced Powder Technology, cilt.25, sa.6, ss.1825-1833, 2014 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 25 Sayı: 6
- Basım Tarihi: 2014
- Doi Numarası: 10.1016/j.apt.2014.07.012
- Dergi Adı: Advanced Powder Technology
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.1825-1833
- Anahtar Kelimeler: Crystal morphology, Hydrothermal synthesis, Piezoelectrics, Sodium niobate
- Maltepe Üniversitesi Adresli: Evet
Özet
Sodium niobate - NN (NaNbO3) powders were synthesized by hydrothermal process to be used as template particles in the fabrication of textured lead free piezoelectric ceramics. Sodium hexaniobate-Na8Nb6O19·13H2O particles with rod-like morphology were synthesized at 120 °C. Particles with needle-like morphology and Na2(Nb2O6)(H2O) phase started to form at temperatures of 130 °C and above. Synthesis at 150 °C yields particles with totally needle-like morphology and consisting entirely of the Na2(Nb2O6)(H2O) phase. Sodium niobate-NaNbO3 particles with cubic morphology were synthesized at temperatures of 160 °C and above. Rod-like and needle-like morphology was retained even after annealing at 400 °C for 1 h. A preliminary study was also done to integrate these anisometric template particles in the preparation of textured potassium sodium niobate (KNN) fibers.