The Lithium Doping Effect on (Na_0.5K_0.5)NbO₃ Lead-Free Piezo-Ceramics Structure Stability and Ferroelectric Characteristics

Abstract:

The structure stability、micro-structure and electrical properties of lithium doping on potassium sodium niobate ceramics (Na0.5K0.5)NbO3 (NKN) were investigated in this study. Solid oxide mixing method with post calcination and sintering was employed to fabricate(Na0.5K0.5)(1-x) LixNbO3 ceramic. Lithium oxide was adopted as the sintering aids. For Li doping x=6 mol% in (Na0.5K0.5)(1-x) LixNbO3 ceramic a optimal crystallization and electrical properties could be achieved after 650°C calcination and 1060°C sintering. Ferroelectric properties of the lead-free ceramic behaved a coercive field of 12.5kV/cm and remanent polarization as high as 30uC/cm2.

• Periodical: Applied Mechanics and Materials (Volumes 217-219)
• Pages: 682-685
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.217-219.682
• Online since: November 2012
• Authors: Chuan Chou Hwang, Chen Chia Chou, Jyh Liang Wang, Tsang Yen Hsieh, Jui Te Tseng
• Keywords: Ferroelectric Properties, Lead-Free, Perovskite Structure, Piezoceramic, Tungsten Bronze

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