Sol-gel synthesis of fluorescent materials based on barium aluminate

Barium aluminate was obtained by sol-gel method. We used a heat treatment in an oven at 130°C, and microwave radiation for drying the gel. To obtain a crystalline product all samples were calcined in the muffle furnace at the temperatures up to 1100°C. Complex studies were used to identify the dynamics of phase and structural transformations in the synthesis of barium aluminate. The main stages of formation BaAl2O4 were determined by thermal analysis; evolution of phase composition and crystal structure were studied using X-ray diffraction and IR-spectroscopy. The morphology of surface of the barium aluminate was investigated by scanning electron microscope. In the work fluorescent material with composition Ba1-xEuxAl2O4 was obtained. The maximum of luminescent intensity is achieved with content of Eu3+ equal 0.75 mol in the case of processing of gel by microwaves. The phosphor obtained by heat treatment in an oven gel has a composition Ba0.9Eu0.1Al2O4

Sol-gel synthesis of fluorescent materials based on barium aluminate

Barium aluminate was obtained by sol-gel method. We used a heat treatment in an oven at 130°C, and microwave radiation for drying the gel. To obtain a crystalline product all samples were calcined in the muffle furnace at the temperatures up to 1100°C. Complex studies were used to identify the dynamics of phase and structural transformations in the synthesis of barium aluminate. The main stages of formation BaAl2O4 were determined by thermal analysis; evolution of phase composition and crystal structure were studied using X-ray diffraction and IR-spectroscopy. The morphology of surface of the barium aluminate was investigated by scanning electron microscope. In the work fluorescent material with composition Ba1-xEuxAl2O4 was obtained. The maximum of luminescent intensity is achieved with content of Eu3+ equal 0.75 mol in the case of processing of gel by microwaves. The phosphor obtained by heat treatment in an oven gel has a composition Ba0.9Eu0.1Al2O4

Nitrate-citrate sol-gel synthesis of hydrated calcium aluminate and sorption materials on its basis

Sol-gel technique was used to develop a method for synthesis of hydrated tricalcium aluminate Ca3[Al(OH)6]2 and surface-layered gas-chromatographic sorbents on its basis. The materials obtained were examined by X-ray diffraction analysis, scanning electron microscopy, X-ray fluorescence microanalysis, adsorption porosimetry, and gas chromatography. It was found that cubic Ca3[Al(OH)6]2 is the main phase in the surface layer of the sorption materials. The Hammett indicator method was used to examine the acid-base properties and the variation of the content of active centers between sorbents obtained in different ways. The chromatographic retention parameters were determined for test compounds, and the polarity and selectivity of the sorbents under study was evaluated. It was shown that Chromaton N-AW modified with hydrated calcium aluminate can be used, with addition of SE-30 stationary liquid phase, to separate complex mixtures of organic compounds

Study of calcium aluminate formation

The paper studies phase formation of calcium aluminate prepared by the sol-gel method. The stages of the end products’ formation were proposed using methods of gas chromatography, the thermal and the infrared spectrometric analysis. Dependence of phase composition and the crystalline structure on the annealing temperature of the precursor was revealed

Study of calcium aluminate formation

The paper studies phase formation of calcium aluminate prepared by the sol-gel method. The stages of the end products’ formation were proposed using methods of gas chromatography, the thermal and the infrared spectrometric analysis. Dependence of phase composition and the crystalline structure on the annealing temperature of the precursor was revealed

Synthesis and characteristics of CaAl2O4:Eu3+ phosphor prepared by zol-gel method

Alkaline earth metal aluminates activated by rare-earth ions (REn+) possess intensive luminescence upon UV excitation. The paper studies phase formation of calcium aluminate prepared by the sol-gel method. The stages of the end products’ formation using methods of the thermal and the infrared spectrometric analysis and X-ray diffraction are proposed. Dependence of phase composition, the surface morphology and luminescence properties on the annealing temperature of the precursor is investigated

Sol-gel synthesis of fluorescent materials based on barium aluminate

Barium aluminate was obtained by sol-gel method. We used a heat treatment in an oven at 130°C, and microwave radiation for drying the gel. To obtain a crystalline product all samples were calcined in the muffle furnace at the temperatures up to 1100°C. Complex studies were used to identify the dynamics of phase and structural transformations in the synthesis of barium aluminate. The main stages of formation BaAl2O4 were determined by thermal analysis; evolution of phase composition and crystal structure were studied using X-ray diffraction and IR-spectroscopy. The morphology of surface of the barium aluminate was investigated by scanning electron microscope. In the work fluorescent material with composition Ba1-xEuxAl2O4 was obtained. The maximum of luminescent intensity is achieved with content of Eu3+ equal 0.75 mol in the case of processing of gel by microwaves. The phosphor obtained by heat treatment in an oven gel has a composition Ba0.9Eu0.1Al2O4

Synthesis and characteristics of CaAl2O4:Eu3+ phosphor prepared by zol-gel method

Alkaline earth metal aluminates activated by rare-earth ions (REn+) possess intensive luminescence upon UV excitation. The paper studies phase formation of calcium aluminate prepared by the sol-gel method. The stages of the end products’ formation using methods of the thermal and the infrared spectrometric analysis and X-ray diffraction are proposed. Dependence of phase composition, the surface morphology and luminescence properties on the annealing temperature of the precursor is investigated

Study of calcium magnesium aluminate CaMgAl10O17 formation

Aluminates of alkaline earth elements have high photoluminescence properties and resistance to UV radiation. Due to this, they are widely used in optical industry. In this work magnesium calcium aluminate was prepared by sol-gel method. The main stages of the formation of the crystalline structure CaMgAl10O17 were determined by thermal analysis, X-ray diffraction and IR spectroscopy. The surface morphology was studied using scanning electron microscopy. The ratio of elements in the product was installed by X-ray microanalysis

Study of calcium magnesium aluminate CaMgAl10O17 formation

Aluminates of alkaline earth elements have high photoluminescence properties and resistance to UV radiation. Due to this, they are widely used in optical industry. In this work magnesium calcium aluminate was prepared by sol-gel method. The main stages of the formation of the crystalline structure CaMgAl10O17 were determined by thermal analysis, X-ray diffraction and IR spectroscopy. The surface morphology was studied using scanning electron microscopy. The ratio of elements in the product was installed by X-ray microanalysis