Combustion Synthesis of Nanosized Y2Hf2O7 and Lu2Hf2O7 Powders

Yi Kun Liao; Dan Yu Jiang; Ya Ming Ji; Jian Lin Shi

doi:10.4028/www.scientific.net/KEM.280-283.643

Paper Titles

Synthesis of Perovskite Pb(Zr_0.52Ti_0.48)O₃ (PZT) Powders by a Modified Coprecipitation Method
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Preparation of Nanocrystalline Ba₃(Ca_1.18Nb_1.82)O_9-δ Powder with Sol-Gel Auto-Ignition Synthesis Process
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Low-Temperature Synthesis of PMnN-PZT Powders by Hybrid Method of Sol-Gel and Ultrasonic Atomization
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Characteristics of Sr₂CeO₄ Powder Phosphor Prepared by Combustion Route
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Combustion Synthesis of Nanosized Y₂Hf₂O₇ and Lu₂Hf₂O₇ Powders
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Photocatalytic Properties of the Transition Metal Doped TiO₂ Powder Prepared by Sol-Gel Process
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Converting Industrial TiO₂ into Titanate Nanotubes by Simple Sonochemical-Hydrothermal Processing
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Synthesis of Nanometer Cobalt Oxide (Co₃O₄) Powders by Solid-State Reaction under Microwave Irradiation
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Preparation and Characterization of Semi-Conducting (Ba,Sr)TiO₃ Powders by a Wet Chemical Route
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HomeKey Engineering MaterialsKey Engineering Materials Vols. 280-283Combustion Synthesis of Nanosized Y2Hf2O7 and...

Combustion Synthesis of Nanosized Y₂Hf₂O₇ and Lu₂Hf₂O₇ Powders

Abstract:

Y2Hf2O7 and Lu2Hf2O7 precursor powders are prepared by nitrate solution combustion method with various fuels at 450°C, respectively. Phase evolution of the synthesized powders was determined by X-ray diffraction (XRD) techniques. Single-phase cubic Y2Hf2O7 and Lu2Hf2O7 crystalline powders were obtained by calcining the resultant combustion ash at 800°C for 2h. By controlling the pH of the nitrate solution, the type of fuel and the ratio of fuel/nitrate, nanosized powders can be obtained. The crystallite size of resultant powders is much related to the combustion flame temperature, which can be controlled by controlling the type of fuel and adjusting the fuel-to-oxidizer ratio. The influence of the ratio of reactants and the type of fuel on the properties of the final products was investigated. The crystal size and morphology were analyzed by TEM.