Ananta, S (2004) Synthesis, formation and characterization of Mg4Nb2O9 powders. Materials Letters, 58 (20). 2530 - 2536.
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Official URL: http://www.sciencedirect.com/science/article/B6TX9...
Abstract
Magnesium niobate (Mg4Nb2O9) powders have been prepared and characterized by thermogravimetric and differential thermal analysis (TG–DTA), X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy-dispersive X-ray (EDX) techniques. The effect of calcination temperature, dwell time and heating/cooling rates on phase formation, morphology and chemical composition of the powders are examined. The calcination temperature and dwell time have been found to have a pronounced effect on the phase formation and morphology of the calcined magnesium niobate powders. It has been found that the minor phases of nano-sized MgO inclusion and the columbite-type MgNb2O6 phase tend to form together with the corundum-type Mg4Nb2O9 phase, depending on calcination conditions. It is seen that optimisation of calcination conditions can lead to a single-phase Mg4Nb2O9 in a hexagonal phase.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Magnesium niobate; Mg4Nb2O9; Powder synthesis; Phase formation; Calcination; X-ray diffraction |
| Subjects: | Material Science > Nanofabrication processes and tools Material Science > Nanochemistry Material Science > Nanostructured materials |
| ID Code: | 6876 |
| Deposited By: | SPI |
| Deposited On: | 24 Sep 2009 17:24 |
| Last Modified: | 24 Sep 2009 17:24 |
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