effect of alumina bubble modification on properties of
Effect of Li Na and K Modification of Alumina on its
The effect of alkali metal (Li Na K) incorporation on the morphology and water vapor uptake properties of mesoporous Al 2 O 3 has been studied. The modification of the raw material pseudoboehmite represented a mixture of low-temperature phases (γ η χ)-Al 2 O 3 and has been done at low-temperature that does not change the phase ratio.A decrease in specific surface values and an
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Effect of Alumina Contents on the Physicomechanical
Polyester-based composites filled with various contents of alumina (Al 2 O 3 ) (i.e. 0 1 5 and 10 vol ) have been fabricated in this study. Physical and mechanical properties of the composites have also been analysed. The analysis results showed that the experimental density of the polyester/alumina composites was smaller than the theoretical density which could be attributed to the
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Effects of filler loading and surface modification on
· The effects of filler loading and surface modification on the electrical and thermal properties of the epoxy/MMT composites are investigated. Compared with the pure epoxy resin the epoxy/MMT composite whether MMT is surface-treated or not shows low dielectric permittivity low dielectric loss and enhanced dielectric strength.
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Effect of Cavitation Bubble Collapse on the Modification
· This review examines the concepts how cavitation bubble collapse affects crystalline structure the crystallization of newly formed structures and recrystallization. Although this subject can be discussed in a broad sense across the area of metastable crystallization our main focus is discussing specific examples of the inorganic solids metal intermetallics metal oxides and silicon.
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Influence of Surface Modification of Alumina on
· In this research aluminium powder (50 wt ) and alumina (50 wt ) were first milled at a specific ball-to-powder ratio in a high-energy planetary mill at different times to manufacture Al-Al 2 O 3 composite. Then the capsules of powdery composites (Al-Al 2 O 3 ) CP produced at the milling stage were added to aluminium melt and cast through ex situ.
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Effect of Surface Functional Modification of Nano-Alumina
· Surface organic molecule modification of nanosized alumina particles is an effective way to improve its dispersion in polymer and to enhance the properties of polymer nanocomposites. In the present study γ -aminopropyl triethoxysilane was used as a surface modification agent to react with the hydroxyl group on the surface of nanosized alumina.
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Effect of Alumina Contents on the Physicomechanical
Polyester-based composites filled with various contents of alumina (Al 2 O 3 ) (i.e. 0 1 5 and 10 vol ) have been fabricated in this study. Physical and mechanical properties of the composites have also been analysed. The analysis results showed that the experimental density of the polyester/alumina composites was smaller than the theoretical density which could be attributed to the
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4 6-Dimethyldibenzothiophene Hydrodesulfurization on
· The effects of the method of modifying USY zeolite with nickel on the hydrodesulfurization (HDS) of 4 6-dimethyldibenzothiophene (4 6-DMDBT) have been investigated. USY zeolites were modified with a small amount of Ni by three different methods namely the in situ synthesis method the ion-exchange method and the impregnation method and the resulting Ni-modified USY zeolites were
Get PriceModification with boehmite-derived alumina nanoparticles
· Nanostructured γ-Al2O3 with an average particle size of 90 nm was synthesized by coated silica in solution. As a type of hard template the coated silica shell layer could decrease the sinter of alumina particles during the phase transition process at 550
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Modification of Double Oxide Film Defects with the
· In this work Mo was added into Al melt to reduce the detrimental effect of double-oxide film defect. An air bubble was trapped in a liquid metal (2L99) served as an analogy for double-oxide film defect in aluminum alloy castings. It was found that the addition of Mo significantly accelerated the consumption of the entrapped bubble by 60 pct after holding for 1 hour. 2 sets of testbar molds
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Effect of Li Na and K Modification of Alumina on its
The effect of alkali metal (Li Na K) incorporation on the morphology and water vapor uptake properties of mesoporous Al 2 O 3 has been studied. The modification of the raw material pseudoboehmite represented a mixture of low-temperature phases (γ η χ)-Al 2 O 3 and has been done at low-temperature that does not change the phase ratio.A decrease in specific surface values and an
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Effect of nano-alumina modified foaming agents on
· Effect of nano-alumina modified foaming agents on foamed concrete3.2.1. Strength drying shrinkage uniformity and water absorption. The effects of foaming agent with and without nano-alumina on the mechanical strength of the foamed concretes are illustrated in Fig. 9. With the increase in time the strength for all samples improved.
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Characterization of Modified and Polymer Coated Alumina
· The prepared modified and coated alumina surfaces were characterized by infrared spectroscopy (FTIR) to investigate the surface properties of the individual and double modified samples. FTIR helps in reporting the changes occurred in hydroxyl groups as well as the structure changes as a result of thermal treating hydrothermal treating silylation treating alkali metal treating coating
Get PriceEffect of modification of the alumina acidity on the
The effect of alumina acidity change on the properties of sulfided Mo and CoMo has been characterized using transmission electron microscope X-ray photoelectron spectroscopy and IR spectroscopy of CO-adsorption as well as model compound reactions as thiophene hydrodesulfurization (HDS) 4 6-dimethyldibenzothiophene (4 6-DMDBT) HDS and 2 6
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Assessment Effect of Surface Modification of Nano Alumina
Assessment Effect of Surface Modification of Nano Alumina with Vinyl Trimethoxy Silane to Mechanical Properties of Vinyl Ester Resin. Rostam M. This paper reports Surface treatment of nano alumina with vinyl silane coupling agents was performed.
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Effect of Alumina Contents on the Physicomechanical
Polyester-based composites filled with various contents of alumina (Al 2 O 3 ) (i.e. 0 1 5 and 10 vol ) have been fabricated in this study. Physical and mechanical properties of the composites have also been analysed. The analysis results showed that the experimental density of the polyester/alumina composites was smaller than the theoretical density which could be attributed to the
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Effect of Li Na and K Modification of Alumina on its
It has been established that alkaline modification Al2O3 with the lithium cations did not result in adsorption ability improvement whereas samples that were modified with sodium or potassium in the amount of 1.2 weight and 2.6 weight respectively possess a higher equilibrium capacity (by 40 ) as compared to that of the initial sample (Al2O3) and a sufficiently high adsorption rate.
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Effect of Li Na and K Modification of Alumina on its
The effect of alkali metal (Li Na K) incorporation on the morphology and water vapor uptake properties of mesoporous Al 2 O 3 has been studied. The modification of the raw material pseudoboehmite represented a mixture of low-temperature phases (γ η χ)-Al 2 O 3 and has been done at low-temperature that does not change the phase ratio.A decrease in specific surface values and an
Get Price
How does rare earth affect the performance of alumina
· The more rare earth oxides are added the more obvious the effect of reducing the sintering temperature but excessive addition will make the mechanical properties of ceramics worse. Influence on the microstructure of alumina ceramics After doping with
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Effect of hydrogen on the integrity of aluminium–oxide
· Hydrogen can facilitate the detachment of protective oxide layer off metals and alloys. The degradation is usually exacerbated at elevated temperatures in many industrial applications however
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Effect of Sintering on Structural Modification and Phase
· The pellets are made with the synthesized powder and are subjected to annealing for different durations and its effect on the structural properties of the Al-LLZO is investigated in detail. Reitveld refinement of the powder X-ray diffraction pattern reveals that the sintered Al-LLZO belong to the cubic system with the Ia-3d space group at room
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Modification of Double Oxide Film Defects with the
· In this work Mo was added into Al melt to reduce the detrimental effect of double-oxide film defect. An air bubble was trapped in a liquid metal (2L99) served as an analogy for double-oxide film defect in aluminum alloy castings. It was found that the addition of Mo significantly accelerated the consumption of the entrapped bubble by 60 pct after holding for 1 hour. 2 sets of testbar molds
Get PriceEffect of binder on the structure and mechanical
· The scientists spend much time on the binders of alumina ceramics and modification of alumina bubbles in order to lower the sintering temperature and improve the strength and quality uniform . The results of different researchers have great differences.
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Effect of in-situ modification of α-alumina nanoparticles
· According to the wide literature review there are few reports on the modification of α-Al 2 O 3 and its effect on the PMMA properties to the best knowledge of the authors. Therefore an in situ polymerization approach is utilized in the present study to modify α -Al 2 O 3 nanoparticles.
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Effect of Surface Functional Modification of Nano-Alumina
· Surface organic molecule modification of nanosized alumina particles is an effective way to improve its dispersion in polymer and to enhance the properties of polymer nanocomposites. In the present study γ -aminopropyl triethoxysilane was used as a surface modification agent to react with the hydroxyl group on the surface of nanosized alumina.
Get Price
Assessment Effect of Surface Modification of Nano Alumina
Assessment Effect of Surface Modification of Nano Alumina with Vinyl Trimethoxy Silane to Mechanical Properties of Vinyl Ester Resin. Rostam M. This paper reports Surface treatment of nano alumina with vinyl silane coupling agents was performed.
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Effect of alumina bubble modification on properties of
· In this work the effects of modification of alumina bubbles with silica sol on the properties of mullite castables were studied. After the alumina bubbles were modified by silica sol the bulk density of the samples was slightly increased and the apparent porosity was decreased.
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Effect of modification of the alumina acidity on the
The effect of alumina acidity change on the properties of sulfided Mo and CoMo has been characterized using transmission electron microscope X-ray photoelectron spectroscopy and IR spectroscopy of CO-adsorption as well as model compound reactions as thiophene hydrodesulfurization (HDS) 4 6-dimethyldibenzothiophene (4 6-DMDBT) HDS and 2 6
Get PriceEffect of modification of the alumina acidity on the
The effect of alumina acidity change on the properties of sulfided Mo and CoMo has been characterized using transmission electron microscope X-ray photoelectron spectroscopy and IR spectroscopy of CO-adsorption as well as model compound reactions as thiophene hydrodesulfurization (HDS) 4 6-dimethyldibenzothiophene (4 6-DMDBT) HDS and 2 6-dimethylaniline (DMA) hydrodenitrogenation
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