کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1476089 | 991141 | 2012 | 6 صفحه PDF | دانلود رایگان |
BaTiO3–xLiF ceramics were prepared by a conventional sintering method using BaTiO3 powder about 100 nm in diameter. The effects of LiF content (x) and sintering temperature on density, crystalline structure and electrical properties were investigated. A phase transition from tetragonal to orthorhombic symmetry appeared as sintering temperatures were raised from 1100 °C to 1200 °C or as LiF was added from 0 mol% to 3 mol%. BaTiO3–6 mol% LiF ceramic sintered at 1000 °C exhibited a high relative density of 95.5%, which was comparable to that for pure BaTiO3 sintered at 1250 °C. BaTiO3–4 mol% LiF ceramic sintered at 1100 °C exhibited excellent properties with a piezoelectric constant d33 = 270 pC/N and a planar electromechanical coupling coefficient kp = 45%, because it is close to the phase transition point in addition to high density.
Journal: Journal of the European Ceramic Society - Volume 32, Issue 4, April 2012, Pages 899–904