Homogeneous precipitation synthesis and characterization of BaTi5O11 powders
BaTi5O11 powders with microwave dielectric application potentials were synthesized using the homogeneous precipitation method and characterized. The precursor of the powders was prepared by co-precipitation of a solution of barium and titanium species with oxalic acid at a temperature of 80°C and su...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
2014
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| Online Access: | http://www.scopus.com/inward/record.url?eid=2-s2.0-0041387363&partnerID=40&md5=96b1cd54565d410b21e6c5efbb3b8384 http://cmuir.cmu.ac.th/handle/6653943832/6001 |
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| Institution: | Chiang Mai University |
| Language: | English |
| Summary: | BaTi5O11 powders with microwave dielectric application potentials were synthesized using the homogeneous precipitation method and characterized. The precursor of the powders was prepared by co-precipitation of a solution of barium and titanium species with oxalic acid at a temperature of 80°C and subsequent calcination at different temperatures. The phase evolution and characteristics of the samples were studied using differential thermal analysis. Fourier transform infrared spectroscopy, x-ray diffractometry, and transmission electron diffraction. The results show that formation of BaTi5O11 starts around 700°C and continues until 1100°C in air, and in this calcination temperature range all powders appear to be single-phase, monoclinic BaTi5O11. Scanning electron microscopy and transmission electron microscopy observations reveal that the sizes of the particles, nearly round in shape, formed due to agglomeration, are about 100 nm at a calcination temperature of 700°C, and 600 nm at 1100°C. |
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