کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1611372 | 1516301 | 2014 | 4 صفحه PDF | دانلود رایگان |
• La3+ ions entered the unit cell maintaining the perovskite structure.
• The dielectric behavior show a crossover from ferroelectric to relaxor characteristics.
• Remnant polarization and strain decreased with increasing La concentration.
Ba1−xLaxZr0.1Ti0.9O3 ceramics have been prepared by the mixed-oxide route, and their structure and dielectric properties have been investigated. Results showed that La3+ ions entered the unit cell maintaining the perovskite structure. The evolution of dielectric behavior from a sharp dielectric peak with pinched phase transitions (x = 0.00) to a broad dielectric peak with frequency dependence (0.01 ⩽ x ⩽ 0.02) and successively to a ferroelectric relaxor (x = 0.05) was observed with increasing La concentration. Furthermore, remnant polarization and strain decreased due to phase transformation from ferroelectric tetragonal to paraelectric pseudocubic at room temperature.
Journal: Journal of Alloys and Compounds - Volume 592, 15 April 2014, Pages 105–108