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MgNb2O6 nanocrystalline powders have been synthesized at a low temperature by improved citrate sol–gel method in this paper. The high quality solution of Nb5+ was prepared using Nb2O5 as the starting material. The crystal structure and microstructure of MgNb2O6 powders were characterized by XRD and SEM techniques, and the effects of preparation craft including pH value and the proportion of citric...
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