Study on the Phase Formation of Corundum-Type Mg4Nb2O9 Powders by the Solid-State Process

Yi Shan Jiang; Ying Zi Wang; Ya Ming Chen; Yun Long Yue; Hai Tao Wu

doi:10.4028/www.scientific.net/AMR.499.174

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Effects of Ball Milling Time on the Microwave Properties of Mg₄Nb₂O₉ Ceramics by the Solid-State Process
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Study on the Phase Formation of Corundum-Type Mg₄Nb₂O₉ Powders by the Solid-State Process
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Effects of Sintering Temperatures on Microwave Properties of Mg₄Nb₂O₉ Ceramics by the Solid-State Process
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Effects of Holding Time on Microwave Properties of Mg₄Nb₂O₉ Ceramics by the Solid-State Process
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Advances in Process Technology of Sepiolite Mineral Fibrous Materials
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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 499Study on the Phase Formation of Corundum-Type...

Study on the Phase Formation of Corundum-Type Mg₄Nb₂O₉ Powders by the Solid-State Process

Abstract:

The corundum-type magnesium niobate, Mg₄Nb₂O₉, powders were synthesized by the conventional solid-state process. The mixtures of MgO and Nb₂O₅ were calcined in the temperature ranging from 500°C to 1200°C for crystallization in air atmosphere. The formation of the Mg₄Nb₂O₉ phase was investigated as a function of calcination temperatures by DTA and XRD. The morphology and phase composition were determined via a combination of SEM and EDX techniques. The results showed that the single-phase Mg₄Nb₂O₉ could be obtained at 1050°C for 2h with the size of less than 5μm.