Formation of monodispersed Ta2O5 powders
The Ta2O5 powders synthesized by the hydrolysis of tantalum pentaethoxide, Ta(OC2H5)5 in alcoholic solution were monodispersed fine oxide particles, which were a uniform, spherical shape, non-agglomerate, and had a narrow size distribution. They grew to 1.2μm after ageing for 1 h after hydrolysis. Powder X-ray diffraction and differential thermal analysisthermogravimetric analysis showed the particles were amorphous and hydrated. These particles lost the water at 290° C and gave well-crystalline Ta2Oμ at 740° C. Throughout these thermal processes, the particle morphology was kept almost the same.
KeywordsOxide Polymer Hydrolysis Hydrated Tantalum
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