ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Lead-free piezoelectric ceramics lithium sodium potassium niobate (LixNayK1-x-y)NbO3(LNKN100x/100y) have been synthesized by a conventional solid state process. The effects of MnO2addition on the properties of (LixNayK1-x-y)NbO3(x=0.06, y=0.5)(LNKN6/50) ceramics were investigated.It was found that a morphotropic phase boundary (MPB) between orthorhombic and tetragonal phases isin the composition range 0.05〈x〈0.07. The piezoelectric constant d33 and the planar electromechanicalcoefficient kp of LNKN6/50 ceramics reach 222pC/N and 39%, respectively. As the amount of MnO2-doped increases, dielectric constant, piezoelectric constant and Curie temperature Tc of LNKN:Mnceramics decreased, while mechanical quality factor Qm of LNKN6/50:Mn increased prominentlycompared to pure LNKN6/50 ceramics. The addition of MnO2 can also decrease the sintering temperatureeffectively of LNKN6/50 ceramics
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.336-338.199.pdf
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