کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1611662 | 1516303 | 2014 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Preparation, characterization and dielectric tunability of La2NiMnO6 ceramics Preparation, characterization and dielectric tunability of La2NiMnO6 ceramics](/preview/png/1611662.png)
• PVA sol–gel route was used for the synthesis of La2NiMnO6.
• The single-phase La2NiMnO6 was prepared successfully at 600 °C.
• La2NiMnO6 ceramics show dielectric tunability.
• The ɛ–E relation was described by the “multi-polarization mechanism” model.
La2NiMnO6 powders were prepared by using a polyvinyl alcohol (PVA) sol–gel route. Differential scanning calorimetry (DSC), thermogravimetric (TG) analysis, Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM) were used to characterize the precursors and the derived oxide powders. Single-phase La2NiMnO6 of about 40–50 nm diameters was synthesized at 600 °C for 2 h, without the formation of any intermediate phase. La2NiMnO6 ceramics sintered at 1000 °C had tunability of 28% and 20% at 8 V/mm at 100 kHz and 1 MHz, respectively. The electric field dependence of dielectric constant of the ceramics was well described by using the “multi-polarization mechanism” model.
Journal: Journal of Alloys and Compounds - Volume 590, 25 March 2014, Pages 541–545