کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1463827 | 989652 | 2008 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Grain growth kinetics in Dy-doped Bi0.5Na0.5TiO3 ceramics Grain growth kinetics in Dy-doped Bi0.5Na0.5TiO3 ceramics](/preview/png/1463827.png)
Dysprosium-doped bismuth sodium titanate ceramics were prepared using the conventional mixed-oxide method. The amount of dysprosium used was varied from 0 to 2 at.%. The mixed powders were calcined at 800 °C and checked for phase purity using X-ray diffraction technique. The calcined powders were then cold-pressed into pellets and sintered at 1050 °C for the time ranging from 2 to 48 h. The ceramics were checked for phases and microstructures using an X-ray diffractometer and a scanning electron microscope, respectively. The analysis showed that undoped BNT ceramics sintered at longer time exhibited a significant grain growth with non-uniform grain size distribution and shape. The Dy-doped BNT however showed a much more limited grain growth behavior, resulting in smaller grain size and more equiaxed grain shape. It was also found that all Dy-doped BNT ceramics sintered at 48 h possessed lower porosity than those sintered for shorter time.
Journal: Ceramics International - Volume 34, Issue 4, May 2008, Pages 769–772