Fabrication of sodium potassium niobate ceramics by two step sintering assisted molten salts synthesis

• Main Authors: Narumon Lartcumfu, Chatchai Kruea-In, Nattaya Tawichai, Gobwute Rujijanagul
• Format: Journal
• Published: 2018
• Subjects: Materials Science; Physics and Astronomy
• Online Access: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84891762841&origin=inward; http://cmuir.cmu.ac.th/jspui/handle/6653943832/52710
• Institution: Chiang Mai University

Potassium sodium niobate (KNN) powders were synthesized by a molten salt synthesis. The pure phase KNN was achieved for a calcination temperature of 500 °C which is lower than the conventional technique by 400°C. The KNN ceramics were then fabricated by a two steps sintering technique. Effects of dwell time at T2on the properties of the ceramics were investigated. Although there was unchanged in microstructure, the dielectric results indicate that a longer dwell time produced a higher value of peak dielectric constant. However, the 8 h sample exhibited the densest ceramic and showed a better ferroelectric performance. © 2013 Copyright Taylor and Francis Group, LLC.