waleed ragab agami (10 risultati)

Paperback. Condizione: Brand New. 144 pages. 8.66x5.91x0.33 inches. In Stock.

Taschenbuch. Condizione: Neu. Effect of Laser Radiation on the Physical Properties of PVC Polymers | Waleed Ragab Agami | Taschenbuch | Englisch | 2017 | Noor Publishing | EAN 9783330840737 | Verantwortliche Person für die EU: Noor Publishing, Brivibas Gatve 197, 1039 RIGA, LETTLAND, customerservice[at]vdm-vsg[dot]de | Anbieter: preigu.

Taschenbuch. Condizione: Neu. Electric and Magnetic Studies of Various Ions Substituted LiZn Ferrite | Promising results for different applications were obtained by improvement of all different parameters | Waleed Ragab Agami | Taschenbuch | 204 S. | Englisch | 2014 | LAP LAMBERT Academic Publishing | EAN 9783659494994 | Verantwortliche Person für die EU: preigu GmbH & Co. KG, Lengericher Landstr. 19, 49078 Osnabrück, mail[at]preigu[dot]de | Anbieter: preigu.

Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -From this study one can draw the conclusion that the addition of PEC-NPMI to PVC with concentration 0.01gm/1gmPVC improves the thermal stability of pure PVC and thus prolongs the service life time of articles made from this polymer. The results of differential thermal analysis indicated that the sample of 0.01gmPEC-NPMI/1gmPVC has the highest melting temperature Tm. While exposing it to infrared laser radiation leads to a decrease of its Tm value, which is most suitable for applications requiring the molding of this polymer at lower temperatures. Also, one can conclude that the IR and UV spectroscopy, refractive index and the degree of ordering in the polymer samples are dependent on both the PEC-NPMI concentration and the laser radiation exposure. The results show that the PVC polymer sample stabilized with 0.01gmPEC-NPMI/1gmPVC and irradiated with 4.27 J/cm2 laser energy fluence has the maximum isotropic nature. The same sample shows the maximum absorbance for electromagnetic waves in the IR and UV regions. This property suggests that this stabilized irradiated PVC polymer could be industrially useful for applications requiring high value of absorbance in in the IR and UV regions 144 pp. Englisch.

Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -The characteristics desired for magnetic materials from the application point of view are: high saturation magnetization, high magnetic permeability, high Curie temperature, high electric resistivity and low cost. Li-Zn ferrite is one of the most important magnetic materials due to its high magnetization and square hysteresis loop. It was found that the composition Li0.3Zn0.4Fe2.3O4 has the maximum saturation magnetization in the Li-Zn ferrite series. I aimed to improve the electric and magnetic properties of such a reference sample using different valent elements (Ca, Bi, Zr and Nb). They were already used as additives and produced different phases. In my work, I prepared Li-Zn ferrite substituted by these four elements with different concentrations by standard ceramic method. Magnetic properties were studied through measuring the magnetization, the initial permeability, Curie temperature and hysteresis loop parameters. Electric properties were studied through temperature dependence of the dc resistivity. Thermoelectric power and the conduction mechanism were discussed. Frequency dependence of the dielectric constant, dielectric loss and ac resistivity were measured and discussed. 204 pp. Englisch.

Condizione: New. Dieser Artikel ist ein Print on Demand Artikel und wird nach Ihrer Bestellung fuer Sie gedruckt. Autor/Autorin: Agami Waleed RagabWaleed Ragab Agami (W.R.Agami) was born in 1974 and had his B.Sc., M.Sc. and Ph.D. from Ain Shams Univ., Egypt. He is a member in Magn. Mater. Lab and a lecturer of physics in the same University since 2009. He work.

Taschenbuch. Condizione: Neu. This item is printed on demand - Print on Demand Titel. Neuware -From this study one can draw the conclusion that the addition of PEC-NPMI to PVC with concentration 0.01gm/1gmPVC improves the thermal stability of pure PVC and thus prolongs the service life time of articles made from this polymer. The results of differential thermal analysis indicated that the sample of 0.01gmPEC-NPMI/1gmPVC has the highest melting temperature Tm. While exposing it to infrared laser radiation leads to a decrease of its Tm value, which is most suitable for applications requiring the molding of this polymer at lower temperatures. Also, one can conclude that the IR and UV spectroscopy, refractive index and the degree of ordering in the polymer samples are dependent on both the PEC-NPMI concentration and the laser radiation exposure. The results show that the PVC polymer sample stabilized with 0.01gmPEC-NPMI/1gmPVC and irradiated with 4.27 J/cm2 laser energy fluence has the maximum isotropic nature. The same sample shows the maximum absorbance for electromagnetic waves in the IR and UV regions. This property suggests that this stabilized irradiated PVC polymer could be industrially useful for applications requiring high value of absorbance in in the IR and UV regionsBooks on Demand GmbH, Überseering 33, 22297 Hamburg 144 pp. Englisch.

Taschenbuch. Condizione: Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - From this study one can draw the conclusion that the addition of PEC-NPMI to PVC with concentration 0.01gm/1gmPVC improves the thermal stability of pure PVC and thus prolongs the service life time of articles made from this polymer. The results of differential thermal analysis indicated that the sample of 0.01gmPEC-NPMI/1gmPVC has the highest melting temperature Tm. While exposing it to infrared laser radiation leads to a decrease of its Tm value, which is most suitable for applications requiring the molding of this polymer at lower temperatures. Also, one can conclude that the IR and UV spectroscopy, refractive index and the degree of ordering in the polymer samples are dependent on both the PEC-NPMI concentration and the laser radiation exposure. The results show that the PVC polymer sample stabilized with 0.01gmPEC-NPMI/1gmPVC and irradiated with 4.27 J/cm2 laser energy fluence has the maximum isotropic nature. The same sample shows the maximum absorbance for electromagnetic waves in the IR and UV regions. This property suggests that this stabilized irradiated PVC polymer could be industrially useful for applications requiring high value of absorbance in in the IR and UV regions.

Taschenbuch. Condizione: Neu. This item is printed on demand - Print on Demand Titel. Neuware -The characteristics desired for magnetic materials from the application point of view are: high saturation magnetization, high magnetic permeability, high Curie temperature, high electric resistivity and low cost. Li-Zn ferrite is one of the most important magnetic materials due to its high magnetization and square hysteresis loop. It was found that the composition Li0.3Zn0.4Fe2.3O4 has the maximum saturation magnetization in the Li-Zn ferrite series. I aimed to improve the electric and magnetic properties of such a reference sample using different valent elements (Ca, Bi, Zr and Nb). They were already used as additives and produced different phases. In my work, I prepared Li-Zn ferrite substituted by these four elements with different concentrations by standard ceramic method. Magnetic properties were studied through measuring the magnetization, the initial permeability, Curie temperature and hysteresis loop parameters. Electric properties were studied through temperature dependence of the dc resistivity. Thermoelectric power and the conduction mechanism were discussed. Frequency dependence of the dielectric constant, dielectric loss and ac resistivity were measured and discussed.VDM Verlag, Dudweiler Landstraße 99, 66123 Saarbrücken 204 pp. Englisch.

Taschenbuch. Condizione: Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - The characteristics desired for magnetic materials from the application point of view are: high saturation magnetization, high magnetic permeability, high Curie temperature, high electric resistivity and low cost. Li-Zn ferrite is one of the most important magnetic materials due to its high magnetization and square hysteresis loop. It was found that the composition Li0.3Zn0.4Fe2.3O4 has the maximum saturation magnetization in the Li-Zn ferrite series. I aimed to improve the electric and magnetic properties of such a reference sample using different valent elements (Ca, Bi, Zr and Nb). They were already used as additives and produced different phases. In my work, I prepared Li-Zn ferrite substituted by these four elements with different concentrations by standard ceramic method. Magnetic properties were studied through measuring the magnetization, the initial permeability, Curie temperature and hysteresis loop parameters. Electric properties were studied through temperature dependence of the dc resistivity. Thermoelectric power and the conduction mechanism were discussed. Frequency dependence of the dielectric constant, dielectric loss and ac resistivity were measured and discussed.