Bi0.5Na0.5TiO3 (BNT) powders with nanometre and micrometre sizes were prepared by an ultrasonic spray pyrolysis process. The BNT powders obtained from the spray solution without citric acid had a spherical shape and micrometre size. On the other hand, the BNT powders obtained from a spray solution with 0.4M citric acid of had nanometre size at a calcinations temperature of 700 °C. Single phase BNT powders with a rhombohedral structure were obtained at a calcination temperature of 700 ° C. The sintering of pellets obtained from the micrometre sized BNT powders started at a temperature of 900 ° C. On the other hand, sintering and grain growth of the pellet obtained from the nanometre sized BNT powders occurred even at the low temperature of 850 °C. The relative densities of the pellets obtained from the nanometre sized BNT powders were 95 and 96% of the theoretical density of BNT at sintering temperatures of 950 and 1000 °C. The mean grain sizes of the pellets sintered at temperatures of 950 and 1000 °C were the same at 1.10 μm.
|Number of pages||7|
|Journal||Journal of Ceramic Processing Research|
|Publication status||Published - 2010|
- Nano powder
- Spray pyrolysis
ASJC Scopus subject areas
- Ceramics and Composites