Effects of YMnO3 Addition on Phase Structure, Microstructure and Electrical Properties of (Na0.515K0.485)0.94Li0.06(Nb0.8Ta0.2)O3 Lead-Free Ceramics

Pornsuda Bomlai

doi:10.4028/www.scientific.net/AMR.979.167

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 979Effects of YMnO3 Addition on Phase Structure,...

Effects of YMnO₃ Addition on Phase Structure, Microstructure and Electrical Properties of (Na_0.515K_0.485)_0.9₄Li_0.0₆(Nb_0.8Ta_0.2)O₃ Lead-Free Ceramics

Abstract:

The (1-x)[(Na_0.515K_0.485)_0.9₄Li_0.0₆(Nb_0.8Ta_0.2)O₃]-xYMnO₃ (x = 0, 0.005, 0.01, 0.015 and 0.02) lead-free ceramics were synthesized by solid-state reaction sintering method. It was found that the addition of YMnO₃ affected on the grain size, phase structure and electrical properties of (Na_0.515K_0.485)_0.94Li_0.06(Nb_0.8Ta_0.2)O₃ ceramics. The grain size decreased with increasing YMnO₃ content (x ≥ 0.01) and led to poor densification. The ceramic doped with 0.5 mol% YMnO₃ showed good electrical properties such as d₃₃ = 195 pC/N, k_p = 43.9 %, T_c = 292 °C, T_O₋_T = 35 °C, ε_r = 820 and rather low dielectric dissipation factor = 2.1%. This indicates that 0.5 mol% YMnO₃ -doped (Na_0.515K_0.485)_0.94Li_0.06(Nb_0.8Ta_0.2)O₃ piezoceramic is an alternative lead-free piezoelectric material for the development of piezoelectric devices working at high temperature.

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Periodical:

Advanced Materials Research (Volume 979)

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167-170

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https://doi.org/10.4028/www.scientific.net/AMR.979.167

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June 2014

Authors:

Pornsuda Bomlai*

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Dielectric, Doping, Lead-Free Materials, Piezoelectric

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