کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1504925 | 993747 | 2012 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Dielectric, pyroelectric and piezoelectric properties in the (1 − x)(0.1BaTiO3–0.9NaNbO3)–xLiNbO3 system Dielectric, pyroelectric and piezoelectric properties in the (1 − x)(0.1BaTiO3–0.9NaNbO3)–xLiNbO3 system](/preview/png/1504925.png)
New lead free piezoceramics with the given compositions (1 − x)(0.1BaTiO3–0.9NaNbO3)–xLiNbO3(0.01 ≤ x ≤ 0.125) were prepared by solid–state reaction technique. XRD patterns revealed a single perovskite-structured phase only for 0.01 ≤ x < 0.05. The dielectric, pyroelectric and piezoelectric responses were investigated for compositions with x = 0.01 and 0.02. For both compositions, ɛ’r exhibited a sharp peak with no frequency dependence (classical ferroelectrics). Losses displayed a strong dispersion at low frequencies in the paraelectric phase which was attributed to Li ionic conductivity in these compositions. The spontaneous polarization was found to be 35 and ≈22 μC cm−2 for x = 0.01 and 0.02 respectively. The transverse piezoelectric coefficient d31 measured for x = 0.01 reached value of 37 pC/N at room temperature while the planar coupling factor was about 0.23.
Figure optionsDownload as PowerPoint slide
Journal: Solid State Sciences - Volume 14, Issue 9, September 2012, Pages 1333–1337