0000000000133639

AUTHOR

A. Aimable

showing 3 related works from this author

Continuous hydrothermal synthesis of nanometric BaZrO3 in supercritical water

2007

Abstract Nanocrystalline barium zirconate (BaZrO 3 ) was synthesized using a hydrothermal synthesis process working in supercritical conditions and in a continuous way. By this method, we succeeded in the continuous and rapid production of nanopowders. As a preliminary work three barium precursors have been investigated: barium hydroxide (Ba(OH) 2 ), barium acetate (Ba(CH 3 COO) 2 ) and barium nitrate (Ba(NO 3 ) 2 ). Two of them (Ba(CH 3 COO) 2 and Ba(NO 3 ) 2 ) led to the pure perovskite phase. Then an experimental design has been conducted in order to determine the influence of the experimental parameters on the crystallinity and the grain size of the final product.

Materials scienceInorganic chemistrychemistry.chemical_element02 engineering and technology010402 general chemistry01 natural sciencesBarium hydroxideInorganic Chemistrychemistry.chemical_compoundCrystallinityMaterials ChemistryHydrothermal synthesisPhysical and Theoretical ChemistryComputingMilieux_MISCELLANEOUSPerovskite (structure)Barium acetateBarium[CHIM.MATE]Chemical Sciences/Material chemistryPowders-chemical preparation021001 nanoscience & nanotechnologyCondensed Matter PhysicsSupercritical fluidGrain size0104 chemical sciencesElectronic Optical and Magnetic MaterialsSupercritical water synthesischemistryChemical engineering[ CHIM.MATE ] Chemical Sciences/Material chemistryCeramics and CompositesBarium nitrate0210 nano-technologyBaZrO3
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ChemInform Abstract: Continuous Hydrothermal Synthesis of Nanometric BaZrO3in Supercritical Water.

2008

Abstract Nanocrystalline barium zirconate (BaZrO 3 ) was synthesized using a hydrothermal synthesis process working in supercritical conditions and in a continuous way. By this method, we succeeded in the continuous and rapid production of nanopowders. As a preliminary work three barium precursors have been investigated: barium hydroxide (Ba(OH) 2 ), barium acetate (Ba(CH 3 COO) 2 ) and barium nitrate (Ba(NO 3 ) 2 ). Two of them (Ba(CH 3 COO) 2 and Ba(NO 3 ) 2 ) led to the pure perovskite phase. Then an experimental design has been conducted in order to determine the influence of the experimental parameters on the crystallinity and the grain size of the final product.

chemistry.chemical_compoundCrystallinityBarium acetatechemistryChemical engineeringHydrothermal synthesischemistry.chemical_elementBarium nitrateBariumGeneral MedicineSupercritical fluidPerovskite (structure)Barium hydroxideChemInform
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Characteristics of LiFePO4 obtained through a one step continuous hydrothermal synthesis process working in supercritical water

2009

International audience; The olivine-like material LiFePO4 was prepared via a continuous hydrothermal synthesis process working from subcritical to supercritical water conditions. The influence of some processing parameters–temperature and reaction time–was investigated in terms of material purity, grain size and morphology. Supercritical conditions were found to be attractive to synthesize in one step a well-crystallized material without impurities. The primary particles size was in the nanometric range. They showed a natural tendency to form micron size agglomerates, which were supposed to be the cause of the limited capacity, as demonstrated through a cross study using laser particle size…

Materials scienceMineralogyOne-Step02 engineering and technology010402 general chemistry01 natural sciencesLiFePO4ImpurityHydrothermal synthesisGeneral Materials ScienceSupercritical water[CHIM.MATE]Chemical Sciences/Material chemistryGeneral ChemistryParticle sizeContinuous hydrothermal synthesis021001 nanoscience & nanotechnologyCondensed Matter PhysicsGrain sizeSupercritical fluid0104 chemical sciencesChemical engineeringAgglomerate[ CHIM.MATE ] Chemical Sciences/Material chemistryParticle-size distributionParticle size0210 nano-technology
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