Morphological Control of Magnesium Phosphate Hydrate from a Highly Concentrated Alkaline Earth Metal Phosphate Solution by Microwave Heating

Takeshi Toyama; Takuya Ishigaya; Nobuyuki Nishimiya

doi:10.4028/www.scientific.net/KEM.617.221

Paper Titles

Fabrication and Fracture Toughness of CNTs/Alumina Composites with Fine Microstructures
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Influence of Cu₂O Addition on Crystallization Process and Microstructure of Transparent Mica Glass-Ceramics
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Interface Formation of Unidirectional SiC_f/SiC Composites by Electrophoretic Deposition Method
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Low-Temperature Synthesis of MgAl₂O₄ by Capsule HIP Using Hydroxides as Starting Materials
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Morphological Control of Magnesium Phosphate Hydrate from a Highly Concentrated Alkaline Earth Metal Phosphate Solution by Microwave Heating
p.221

Reactivity of Carbonates in Superheated Steam under Atmospheric Pressure
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Synthesis of Bio-Cation-Substituted Ca-Apatites by Precipitation
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Transition Edge Sensor (TES) X-Ray Detecting System with Sensitivity Correction to Stabilize the Spectrum Peak Center
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Transmission Electron Microscopy Study of CaFe₅O₇ : Evidence of a Monoclinic Superstructure at Room Temperature
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HomeKey Engineering MaterialsKey Engineering Materials Vol. 617Morphological Control of Magnesium Phosphate...

Morphological Control of Magnesium Phosphate Hydrate from a Highly Concentrated Alkaline Earth Metal Phosphate Solution by Microwave Heating

Abstract:

A CO₂ blowing method was used to obtain a highly concentrated magnesium phosphate solution (47 times more concentrated than conventional solutions). In the present study, we exposed the solution to microwave heating. Fine and uniform spherical particles were obtained by microwave heating at a heating rate of 2030oC·min^-1. Conversely, the products formed plate-like particles after a retention time of 5 min with a low heating rate. The spherical particles had a relatively uniform size of 0.51.0 μm and were composed of magnesium phosphate octahydrate, while the plate-like particles were composed of magnesium phosphate pentahydrate. Spherical particles could not be obtained by heating at a gradual heating rate using a hot plate; instead, large and non-uniform plate-like particles were formed. From this result, it is evident that microwave heating enables the production of unusual shaped particles that are not accessible using ordinary heating methods.